1.
Capitoline Hill
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The Capitoline Hill, between the Forum and the Campus Martius, is one of the Seven Hills of Rome. The hill was known as Mons Saturnius, dedicated to the god Saturn. The word Capitolium first meant the temple of Jupiter Optimus Maximus later built here, Ancient sources refer the name to caput and the tale was that, when laying the foundations for the temple, the head of a man was found. Some sources even saying it was the head of some Tolus or Olus, the Capitolium was regarded by the Romans as indestructible, and was adopted as a symbol of eternity. By the 16th century, Capitolinus had become Capitolino in Italian, influenced by Roman architecture and Roman republican times, the word Capitolium still lives in the English word capitol. The Capitol Hill in Washington, D. C. is widely assumed to be named after the Capitoline Hill, at this hill, the Sabines, creeping to the Citadel, were let in by the Roman maiden Tarpeia. For this treachery, Tarpeia was the first to be punished by being flung from a cliff overlooking the Roman Forum. This cliff was named the Tarpeian Rock after the Vestal Virgin. The Sabines, who immigrated to Rome following the Rape of the Sabine Women, the Vulcanal, an 8th-century BC sacred precinct, occupied much of the eastern lower slopes of the Capitoline, at the head of what would later become the Roman Forum. The summit was the site of a temple for the Capitoline Triad, started by Romes fifth king, Tarquinius Priscus and it was considered one of the largest and the most beautiful temples in the city. The city legend starts with the recovery of a human skull when foundation trenches were being dug for the Temple of Jupiter at Tarquins order, recent excavations on the Capitoline uncovered an early cemetery under the Temple of Jupiter. There are several important temples built on Capitoline hill, the temple of Juno Moneta, the temple of Virtus, the Temple of Jupiter Optimus Maximus Capitolinus is the most important of the temples. It was built in 509 BC and was nearly as large as the Parthenon, the hill and the temple of Jupiter became the symbols of Rome, the capital of the world. The Temple of Saturn was built at the foot of Capitoline Hill in the end of the Forum Romanum. According to legend Marcus Manlius Capitolinus was alerted to the Gallic attack by the geese of Juno. Vespasians brother and nephew were also besieged in the temple during the Year of Four Emperors, the Tabularium, located underground beneath the piazza and hilltop, occupies a building of the same name built in the 1st century BC to hold Roman records of state. The Tabularium looks out from the rear onto the Roman Forum, the main attraction of the Tabularium, besides the structure itself, is the Temple of Veiovis. During the lengthy period of ancient Rome, the Capitoline Hill was the geographical and ceremonial center, however, by the Renaissance, the former center was an untidy conglomeration of dilapidated buildings and the site of executions of criminals
2.
Italy
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Italy, officially the Italian Republic, is a unitary parliamentary republic in Europe. Located in the heart of the Mediterranean Sea, Italy shares open land borders with France, Switzerland, Austria, Slovenia, San Marino, Italy covers an area of 301,338 km2 and has a largely temperate seasonal climate and Mediterranean climate. Due to its shape, it is referred to in Italy as lo Stivale. With 61 million inhabitants, it is the fourth most populous EU member state, the Italic tribe known as the Latins formed the Roman Kingdom, which eventually became a republic that conquered and assimilated other nearby civilisations. The legacy of the Roman Empire is widespread and can be observed in the distribution of civilian law, republican governments, Christianity. The Renaissance began in Italy and spread to the rest of Europe, bringing a renewed interest in humanism, science, exploration, Italian culture flourished at this time, producing famous scholars, artists and polymaths such as Leonardo da Vinci, Galileo, Michelangelo and Machiavelli. The weakened sovereigns soon fell victim to conquest by European powers such as France, Spain and Austria. Despite being one of the victors in World War I, Italy entered a period of economic crisis and social turmoil. The subsequent participation in World War II on the Axis side ended in defeat, economic destruction. Today, Italy has the third largest economy in the Eurozone and it has a very high level of human development and is ranked sixth in the world for life expectancy. The country plays a prominent role in regional and global economic, military, cultural and diplomatic affairs, as a reflection of its cultural wealth, Italy is home to 51 World Heritage Sites, the most in the world, and is the fifth most visited country. The assumptions on the etymology of the name Italia are very numerous, according to one of the more common explanations, the term Italia, from Latin, Italia, was borrowed through Greek from the Oscan Víteliú, meaning land of young cattle. The bull was a symbol of the southern Italic tribes and was often depicted goring the Roman wolf as a defiant symbol of free Italy during the Social War. Greek historian Dionysius of Halicarnassus states this account together with the legend that Italy was named after Italus, mentioned also by Aristotle and Thucydides. The name Italia originally applied only to a part of what is now Southern Italy – according to Antiochus of Syracuse, but by his time Oenotria and Italy had become synonymous, and the name also applied to most of Lucania as well. The Greeks gradually came to apply the name Italia to a larger region, excavations throughout Italy revealed a Neanderthal presence dating back to the Palaeolithic period, some 200,000 years ago, modern Humans arrived about 40,000 years ago. Other ancient Italian peoples of undetermined language families but of possible origins include the Rhaetian people and Cammuni. Also the Phoenicians established colonies on the coasts of Sardinia and Sicily, the Roman legacy has deeply influenced the Western civilisation, shaping most of the modern world
3.
Archaeology
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Archaeology, or archeology, is the study of human activity through the recovery and analysis of material culture. The archaeological record consists of artifacts, architecture, biofacts or ecofacts, Archaeology can be considered both a social science and a branch of the humanities. In North America, archaeology is considered a sub-field of anthropology, archaeologists study human prehistory and history, from the development of the first stone tools at Lomekwi in East Africa 3.3 million years ago up until recent decades. Archaeology as a field is distinct from the discipline of palaeontology, Archaeology is particularly important for learning about prehistoric societies, for whom there may be no written records to study. Prehistory includes over 99% of the human past, from the Paleolithic until the advent of literacy in societies across the world, Archaeology has various goals, which range from understanding culture history to reconstructing past lifeways to documenting and explaining changes in human societies through time. The discipline involves surveying, excavation and eventually analysis of data collected to learn more about the past, in broad scope, archaeology relies on cross-disciplinary research. Archaeology developed out of antiquarianism in Europe during the 19th century, Archaeology has been used by nation-states to create particular visions of the past. Nonetheless, today, archaeologists face many problems, such as dealing with pseudoarchaeology, the looting of artifacts, a lack of public interest, the science of archaeology grew out of the older multi-disciplinary study known as antiquarianism. Antiquarians studied history with attention to ancient artifacts and manuscripts. Tentative steps towards the systematization of archaeology as a science took place during the Enlightenment era in Europe in the 17th and 18th centuries, in Europe, philosophical interest in the remains of Greco-Roman civilization and the rediscovery of classical culture began in the late Middle Age. Antiquarians, including John Leland and William Camden, conducted surveys of the English countryside, one of the first sites to undergo archaeological excavation was Stonehenge and other megalithic monuments in England. John Aubrey was a pioneer archaeologist who recorded numerous megalithic and other monuments in southern England. He was also ahead of his time in the analysis of his findings and he attempted to chart the chronological stylistic evolution of handwriting, medieval architecture, costume, and shield-shapes. Excavations were also carried out in the ancient towns of Pompeii and Herculaneum and these excavations began in 1748 in Pompeii, while in Herculaneum they began in 1738. The discovery of entire towns, complete with utensils and even human shapes, however, prior to the development of modern techniques, excavations tended to be haphazard, the importance of concepts such as stratification and context were overlooked. The father of archaeological excavation was William Cunnington and he undertook excavations in Wiltshire from around 1798, funded by Sir Richard Colt Hoare. Cunnington made meticulous recordings of neolithic and Bronze Age barrows, one of the major achievements of 19th century archaeology was the development of stratigraphy. The idea of overlapping strata tracing back to successive periods was borrowed from the new geological and paleontological work of scholars like William Smith, James Hutton, the application of stratigraphy to archaeology first took place with the excavations of prehistorical and Bronze Age sites
4.
Art museum
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An art museum or art gallery is a building or space for the exhibition of art, usually visual art. Museums can be public or private, but what distinguishes a museum is the ownership of a collection, the term is used for both public galleries, which are non-profit or publicly owned museums that display selected collections of art. On the other hand, private galleries refers to the commercial enterprises for the sale of art, however, both types of gallery may host traveling exhibits or temporary exhibitions including art borrowed from elsewhere. In broad terms, in North American usage, the word gallery alone often implies a private gallery, the term contemporary art gallery refers usually to a privately owned for-profit commercial gallery. These galleries are found clustered together in large urban centers. Smaller cities are home to at least one gallery, but they may also be found in towns or villages. Contemporary art galleries are open to the general public without charge, however. They usually profit by taking a portion of art sales, from 25% to 50% is typical, there are also many non-profit or collective galleries. Some galleries in cities like Tokyo charge the artists a flat rate per day, curators often create group shows that say something about a certain theme, trend in art, or group of associated artists. Galleries sometimes choose to represent artists exclusively, giving them the opportunity to show regularly, a gallerys definition can also include the artist cooperative or artist-run space, which often operates as a space with a more democratic mission and selection process. A vanity gallery is an art gallery that charges fees from artists in order to show their work, the shows are not legitimately curated and will frequently or usually include as many artists as possible. Most art professionals are able to identify them on an artists resume, University art museums and galleries constitute collections of art that are developed, owned, and maintained by all kinds of schools, community colleges, colleges, and universities. This phenomenon exists in both the West and East, making it a global practice, although largely overlooked, there are over 700 university art museums in America alone. This number, in comparison to other kinds of art museums, throughout history, large and expensive works of art have generally been commissioned by religious institutions and monarchs and been displayed in temples, churches, and palaces. Although these collections of art were private, they were made available for viewing for a portion of the public. In classical times, religious institutions began to function as a form of art gallery. Wealthy Roman collectors of engraved gems and other precious objects often donated their collections to temples and it is unclear how easy it was in practice for the public to view these items. At the Palace of Versailles, entrance was restricted to wearing the proper apparel – the appropriate accessories could be hired from shops outside
5.
Michelangelo
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Michelangelo di Lodovico Buonarroti Simoni was an Italian sculptor, painter, architect, and poet of the High Renaissance who exerted an unparalleled influence on the development of Western art. Considered to be the greatest living artist during his lifetime, he has since described as one of the greatest artists of all time. A number of Michelangelos works of painting, sculpture, and architecture rank among the most famous in existence and he sculpted two of his best-known works, the Pietà and David, before the age of thirty. As an architect, Michelangelo pioneered the Mannerist style at the Laurentian Library, at the age of 74, he succeeded Antonio da Sangallo the Younger as the architect of St. Peters Basilica. Michelangelo transformed the plan so that the end was finished to his design, as was the dome, with some modification. Michelangelo was unique as the first Western artist whose biography was published while he was alive, in his lifetime he was often called Il Divino. One of the qualities most admired by his contemporaries was his terribilità, the attempts by subsequent artists to imitate Michelangelos impassioned and highly personal style resulted in Mannerism, the next major movement in Western art after the High Renaissance. Michelangelo was born on 6 March 1475 in Caprese near Arezzo, at the time of Michelangelos birth, his father was the Judicial administrator of the small town of Caprese and local administrator of Chiusi. Michelangelos mother was Francesca di Neri del Miniato di Siena, the Buonarrotis claimed to descend from the Countess Mathilde of Canossa, this claim remains unproven, but Michelangelo himself believed it. Several months after Michelangelos birth, the returned to Florence. There Michelangelo gained his love for marble, as Giorgio Vasari quotes him, If there is good in me. Along with the milk of my nurse I received the knack of handling chisel and hammer, as a young boy, Michelangelo was sent to Florence to study grammar under the Humanist Francesco da Urbino. The young artist, however, showed no interest in his schooling, preferring to copy paintings from churches, the city of Florence was at that time the greatest centre of the arts and learning in Italy. Art was sponsored by the Signoria, by the merchant guilds and by patrons such as the Medici. The Renaissance, a renewal of Classical scholarship and the arts, had its first flowering in Florence, the sculptor Lorenzo Ghiberti had laboured for fifty years to create the bronze doors of the Baptistry, which Michelangelo was to describe as The Gates of Paradise. The exterior niches of the Church of Orsanmichele contained a gallery of works by the most acclaimed sculptors of Florence – Donatello, Ghiberti, Andrea del Verrocchio, and Nanni di Banco. The interiors of the churches were covered with frescos, begun by Giotto. During Michelangelos childhood, a team of painters had been called from Florence to the Vatican, among them was Domenico Ghirlandaio, a master in fresco painting, perspective, figure drawing, and portraiture who had the largest workshop in Florence at that period
6.
Museum
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Most large museums are located in major cities throughout the world and more local ones exist in smaller cities, towns and even the countryside. Museums have varying aims, ranging from serving researchers and specialists to serving the general public, the goal of serving researchers is increasingly shifting to serving the general public. There are many types of museums, including art museums, natural history museums, science museums, war museums, the city with the largest number of museums is Mexico City with over 128 museums. According to The World Museum Community, there are more than 55,000 museums in 202 countries, the English museum comes from the Latin word, and is pluralized as museums. The first museum/library is considered to be the one of Plato in Athens, however, Pausanias gives another place called Museum, namely a small hill in Classical Athens opposite to the Akropolis. The hill was called Mouseion after Mousaious, a man who used to sing on the hill, the purpose of modern museums is to collect, preserve, interpret, and display items of artistic, cultural, or scientific significance for the education of the public. The purpose can also depend on ones point of view, to a family looking for entertainment on a Sunday afternoon, a trip to a local history museum or large city art museum could be a fun, and enlightening way to spend the day. To city leaders, a healthy museum community can be seen as a gauge of the health of a city. To a museum professional, a museum might be seen as a way to educate the public about the museums mission, Museums are, above all, storehouses of knowledge. In 1829, James Smithsons bequest, that would fund the Smithsonian Institution, stated he wanted to establish an institution for the increase, Museums of natural history in the late 19th century exemplified the Victorian desire for consumption and for order. Gathering all examples of classification of a field of knowledge for research. As American colleges grew in the 19th century, they developed their own natural history collections for the use of their students, while many large museums, such as the Smithsonian Institution, are still respected as research centers, research is no longer a main purpose of most museums. While there is a debate about the purposes of interpretation of a museums collection, there has been a consistent mission to protect. Much care, expertise, and expense is invested in efforts to retard decomposition in aging documents, artifacts, artworks. All museums display objects that are important to a culture, as historian Steven Conn writes, To see the thing itself, with ones own eyes and in a public place, surrounded by other people having some version of the same experience can be enchanting. Museum purposes vary from institution to institution, some favor education over conservation, or vice versa. For example, in the 1970s, the Canada Science and Technology Museum favored education over preservation of their objects and they displayed objects as well as their functions. One exhibit featured a printing press that a staff member used for visitors to create museum memorabilia
7.
Bronze sculpture
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Bronze is the most popular metal for cast metal sculptures, a cast bronze sculpture is often called simply a bronze. It can be used for statues, singly or in groups, reliefs and it is often gilded to give gilt-bronze or ormolu. Common bronze alloys have the unusual and desirable property of expanding slightly just before they set, then, as the bronze cools, it shrinks a little, making it easier to separate from the mould. Their strength and ductility is an advantage when figures in action are to be created and these qualities allow the creation of extended figures, as in Jeté, or figures that have small cross sections in their support, such as the equestrian statue of Richard the Lionheart. As recently as 2007 several life sized bronze sculptures by John Waddell were stolen, there are many different bronze alloys, and the term is now tending to be regarded by museums as too imprecise, and replaced in descriptions by copper alloy, especially for older objects. Typically modern bronze is 88% copper and 12% tin, alpha bronze consists of the alpha solid solution of tin in copper. Alpha bronze alloys of 4–5% tin are used to make coins, the proportions of this mixture may suggest that the candlestick was made from a hoard of old coins. The Benin Bronzes are really brass, and the Romanesque Baptismal font at St Bartholomews Church, Liège is described as both bronze and brass. In the Bronze Age, two forms of bronze were used, classic bronze, about 10% tin, was used in casting. Bladed weapons were mostly cast from bronze, while helmets. On one definition, modern statuary bronze is 90% copper and 10% tin, the great civilizations of the old world worked in bronze for art, from the time of the introduction of the alloy for edged weapons. Dancing Girl from Mohenjodaro belonging to Harappan Civilization dating back to 2500 BCE is perhaps the first bronze statue of the world, the Greeks were the first to scale the figures up to life size. Few examples exist in good condition, one is the seawater-preserved bronze Victorious Youth that required painstaking efforts to bring it to its present state for museum display, far more Roman bronze statues have survived. Over the long period of Egyptian dynastic art, small lost-wax bronze figurines were made in large numbers. Sri Lankan Sinhalese Bronze statue of Buddhist Alakothiveshwara Tara Devi statue now in England is an example of Bronze statues. From the ninth through the century the Chola dynasty in South India represented the pinnacle of bronze casting in India. Making bronzes is highly skilled work, and a number of casting processes may be employed, including lost-wax casting, sand casting. The term bronze is also applied to metal sculptures made by electrotyping, although these sculptures are typically pure copper and their fabrication does not involve metal casting
8.
Ancient Rome
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In its many centuries of existence, the Roman state evolved from a monarchy to a classical republic and then to an increasingly autocratic empire. Through conquest and assimilation, it came to dominate the Mediterranean region and then Western Europe, Asia Minor, North Africa and it is often grouped into classical antiquity together with ancient Greece, and their similar cultures and societies are known as the Greco-Roman world. Ancient Roman civilisation has contributed to modern government, law, politics, engineering, art, literature, architecture, technology, warfare, religion, language and society. Rome professionalised and expanded its military and created a system of government called res publica, the inspiration for modern republics such as the United States and France. By the end of the Republic, Rome had conquered the lands around the Mediterranean and beyond, its domain extended from the Atlantic to Arabia, the Roman Empire emerged with the end of the Republic and the dictatorship of Augustus Caesar. 721 years of Roman-Persian Wars started in 92 BC with their first war against Parthia and it would become the longest conflict in human history, and have major lasting effects and consequences for both empires. Under Trajan, the Empire reached its territorial peak, Republican mores and traditions started to decline during the imperial period, with civil wars becoming a prelude common to the rise of a new emperor. Splinter states, such as the Palmyrene Empire, would divide the Empire during the crisis of the 3rd century. Plagued by internal instability and attacked by various migrating peoples, the part of the empire broke up into independent kingdoms in the 5th century. This splintering is a landmark historians use to divide the ancient period of history from the pre-medieval Dark Ages of Europe. King Numitor was deposed from his throne by his brother, Amulius, while Numitors daughter, Rhea Silvia, because Rhea Silvia was raped and impregnated by Mars, the Roman god of war, the twins were considered half-divine. The new king, Amulius, feared Romulus and Remus would take back the throne, a she-wolf saved and raised them, and when they were old enough, they returned the throne of Alba Longa to Numitor. Romulus became the source of the citys name, in order to attract people to the city, Rome became a sanctuary for the indigent, exiled, and unwanted. This caused a problem for Rome, which had a large workforce but was bereft of women, Romulus traveled to the neighboring towns and tribes and attempted to secure marriage rights, but as Rome was so full of undesirables they all refused. Legend says that the Latins invited the Sabines to a festival and stole their unmarried maidens, leading to the integration of the Latins, after a long time in rough seas, they landed at the banks of the Tiber River. Not long after they landed, the men wanted to take to the sea again, one woman, named Roma, suggested that the women burn the ships out at sea to prevent them from leaving. At first, the men were angry with Roma, but they realized that they were in the ideal place to settle. They named the settlement after the woman who torched their ships, the Roman poet Virgil recounted this legend in his classical epic poem the Aeneid
9.
Medieval art
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The medieval art of the Western world covers a vast scope of time and place, over 1000 years of art in Europe, and at times the Middle East and North Africa. It includes major art movements and periods, national and regional art, genres, revivals, the crafts. Art historians attempt to classify medieval art into major periods and styles, in addition each region, mostly during the period in the process of becoming nations or cultures, had its own distinct artistic style, such as Anglo-Saxon art or Norse art. Medieval art in Europe grew out of the heritage of the Roman Empire. These sources were mixed with the vigorous barbarian artistic culture of Northern Europe to produce an artistic legacy. Indeed, the history of art can be seen as the history of the interplay between the elements of classical, early Christian and barbarian art. The period ended with the self-perceived Renaissance recovery of the skills and values of art. Since a revival of interest and understanding in the 19th century it has seen as a period of enormous achievement that underlies the development of later Western art. Many regions did not regain their population levels until the 17th century. The population of Europe is estimated to have reached a low point of about 18 million in 650, doubling by 1000, in 1450 it was still only 50 million. To these figures, Northern Europe, especially Britain, contributed a lower proportion than today, and Southern Europe, including France, the increase in prosperity, for those who survived, was much less affected by the Black Death. Until about the 11th century most of Europe was short of labour, with large amounts of unused land. The medieval period saw the falling away of the invasions and incursions from outside the area that characterized the first millennium. The impression may be left by the works that almost all medieval art was religious. Most churches have been rebuilt, often times, but medieval palaces and large houses have been lost at a far greater rate. The situation is similar in most of Europe, though the 14th century Palais des Papes in Avignon survives largely intact. Paper became available in the last centuries of the period, but was extremely expensive by todays standards. Art in the Middle Ages is a subject and art historians traditionally divide it in several large-scale phases, styles or periods
10.
Renaissance
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The Renaissance was a period in European history, from the 14th to the 17th century, regarded as the cultural bridge between the Middle Ages and modern history. It started as a movement in Italy in the Late Medieval period and later spread to the rest of Europe. This new thinking became manifest in art, architecture, politics, science, Early examples were the development of perspective in oil painting and the recycled knowledge of how to make concrete. Although the invention of movable type sped the dissemination of ideas from the later 15th century. In politics, the Renaissance contributed to the development of the customs and conventions of diplomacy, the Renaissance began in Florence, in the 14th century. Other major centres were northern Italian city-states such as Venice, Genoa, Milan, Bologna, the word Renaissance, literally meaning Rebirth in French, first appeared in English in the 1830s. The word also occurs in Jules Michelets 1855 work, Histoire de France, the word Renaissance has also been extended to other historical and cultural movements, such as the Carolingian Renaissance and the Renaissance of the 12th century. The Renaissance was a movement that profoundly affected European intellectual life in the early modern period. Renaissance scholars employed the humanist method in study, and searched for realism, however, a subtle shift took place in the way that intellectuals approached religion that was reflected in many other areas of cultural life. In addition, many Greek Christian works, including the Greek New Testament, were back from Byzantium to Western Europe. Political philosophers, most famously Niccolò Machiavelli, sought to describe life as it really was. Others see more competition between artists and polymaths such as Brunelleschi, Ghiberti, Donatello, and Masaccio for artistic commissions as sparking the creativity of the Renaissance. Yet it remains much debated why the Renaissance began in Italy, accordingly, several theories have been put forward to explain its origins. During the Renaissance, money and art went hand in hand, Artists depended entirely on patrons while the patrons needed money to foster artistic talent. Wealth was brought to Italy in the 14th, 15th, and 16th centuries by expanding trade into Asia, silver mining in Tyrol increased the flow of money. Luxuries from the Eastern world, brought home during the Crusades, increased the prosperity of Genoa, unlike with Latin texts, which had been preserved and studied in Western Europe since late antiquity, the study of ancient Greek texts was very limited in medieval Western Europe. One of the greatest achievements of Renaissance scholars was to bring this entire class of Greek cultural works back into Western Europe for the first time since late antiquity, Arab logicians had inherited Greek ideas after they had invaded and conquered Egypt and the Levant. Their translations and commentaries on these ideas worked their way through the Arab West into Spain and Sicily and this work of translation from Islamic culture, though largely unplanned and disorganized, constituted one of the greatest transmissions of ideas in history
11.
Gemstone
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A gemstone is a piece of mineral crystal which, in cut and polished form, is used to make jewelry or other adornments. However, certain rocks or organic materials that are not minerals are used for jewelry and are therefore often considered to be gemstones as well. Most gemstones are hard, but some soft minerals are used in jewelry because of their luster or other properties that have aesthetic value. Rarity is another characteristic that lends value to a gemstone, apart from jewelry, from earliest antiquity engraved gems and hardstone carvings, such as cups, were major luxury art forms. A gem maker is called a lapidary or gemcutter, a worker is a diamantaire. The carvings of Carl Fabergé are significant works in this tradition, the traditional classification in the West, which goes back to the ancient Greeks, begins with a distinction between precious and semi-precious, similar distinctions are made in other cultures. In modern usage the precious stones are diamond, ruby, sapphire, other stones are classified by their color, translucency and hardness. Another unscientific term for semi-precious gemstones used in art history and archaeology is hardstone, in modern times gemstones are identified by gemologists, who describe gems and their characteristics using technical terminology specific to the field of gemology. The first characteristic a gemologist uses to identify a gemstone is its chemical composition, for example, diamonds are made of carbon and rubies of aluminium oxide. Next, many gems are crystals which are classified by their crystal system such as cubic or trigonal or monoclinic, another term used is habit, the form the gem is usually found in. For example, diamonds, which have a crystal system, are often found as octahedrons. Gemstones are classified into different groups, species, and varieties, for example, ruby is the red variety of the species corundum, while any other color of corundum is considered sapphire. Other examples are the Emerald, aquamarine, red beryl, goshenite, heliodor, and morganite, gems are characterized in terms of refractive index, dispersion, specific gravity, hardness, cleavage, fracture, and luster. They may exhibit pleochroism or double refraction and they may have luminescence and a distinctive absorption spectrum. Material or flaws within a stone may be present as inclusions, gemstones may also be classified in terms of their water. This is a grading of the gems luster, transparency. Very transparent gems are considered first water, while second or third water gems are those of a lesser transparency, there is no universally accepted grading system for gemstones. Diamonds are graded using a system developed by the Gemological Institute of America in the early 1950s, historically, all gemstones were graded using the naked eye
12.
Coin
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A coin is a small, flat, round piece of metal or plastic used primarily as a medium of exchange or legal tender. They are standardized in weight, and produced in quantities at a mint in order to facilitate trade. They are most often issued by a government, Coins are usually metal or alloy, or sometimes made of synthetic materials. Coins made of metal are stored in large quantities as bullion coins. Other coins are used as money in transactions, circulating alongside banknotes. Usually the highest value coin in circulation is less than the lowest-value note. In the last hundred years, the value of circulation coins has occasionally been lower than the value of the metal they contain. Exceptions to the rule of face value being higher than content value also occur for some bullion coins made of copper, silver, or gold, while the Eagle, Maple Leaf, and Sovereign coins have nominal face values, the Krugerrand does not. The first coins were developed independently in Iron Age Anatolia and Archaic Greece, India, Coins spread rapidly in the 6th and 5th centuries BCE, throughout Greece and Persia, and further to the Balkans. Standardized Roman currency was used throughout the Roman Empire, important Roman gold and silver coins were continued into the Middle Ages. Fiat money first arose in medieval China, with the paper money. Early paper money was introduced in Europe in the later Middle Ages, the penny was minted as a silver coin until the 17th century. The first circulating United States coins were cents, produced in 1793, Coins were an evolution of currency systems of the Late Bronze Age, where standard-sized ingots, and tokens such as knife money, were used to store and transfer value. In the late Chinese Bronze Age, standardized cast tokens were made and these were replicas in bronze of earlier Chinese currency, cowrie shells, so they were named Bronze Shell. According to Aristotle and Pollux, the first issuer of coins was Hermodike of Kyme The earliest coins are associated with Iron Age Anatolia. Early electrum coins were not standardized in weight, and in their earliest stage may have been ritual objects, such as badges or medals, issued by priests. The first Lydian coins were made of electrum, a naturally occurring alloy of silver, most of the early Lydian coins include no writing, only an image of a symbolic animal. Anatolian Artemis was the Πὀτνια Θηρῶν, whose symbol was the stag, a small percentage of early Lydian/Greek coins have a legend
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