Brass
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Brass is an alloy of copper and zinc, in proportions which can be varied to achieve different colours and mechanical, electrical, acoustic, and chemical properties, but copper typically has the larger
Islamic Golden Age brass astrolabe
Brass lectern with an eagle, attributed to Aert van Tricht, Limburg (Netherlands), circa 1500
Microstructure of rolled and annealed brass (400× magnification)
Brass sampling cock with stainless steel handle
Bronze
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Bronze is an alloy consisting primarily of copper, commonly with about 12–12.5% tin and often with the addition of other metals and sometimes non-metals or metalloids. These additions produce a range
Brass
…times, it is a substitutional alloy: atoms of the two constituents may replace each other within the same crystal structure. Brass is similar to bronze, a copper alloy that contains tin instead of zinc. Both bronze and brass may include small amounts of a range of other elements, including arsenic…
Houmuwu ding (Chinese: 后母戊鼎; pinyin: Hòumǔwù dǐng), the heaviest Chinese ritual bronze ever found; 1300–1046 BC; National Museum of China (Beijing). This ding's name is based on the inscription in the bronze interior wall, which reads Hòumǔwù 'Queen Mother Wu'.
Hoard of bronze socketed axes from the Bronze Age found in modern Germany. This was the most common tool of the period, and also seems to have been used as a store of value.
Roman bronze nails with magical signs and inscriptions, 3rd-4th century AD.
Bronze bell with a visible crystallite structure