Inclusion (mineral)
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An inclusion in mineralogy is any material trapped inside a mineral during its formation. In gemology, it is an object enclosed within a gemstone or reaching its surface from the interior. According t
Dark inclusions of aegerine in light-green apatite
Sketch showing different shapes of inclusions
An insect encased in amber, has gas bubbles protruding from its thorax and head.
The term three phase relates to the three phases of matter, solid, liquid, and gas. This is a three phase inclusion in rock crystal quartz. The solid is a black material that is of bituminous origin. The liquid encased is petroleum, and the gas bubble is methane.
Sapphire
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Sapphire is a precious gemstone, a variety of the mineral corundum, consisting of aluminium oxide with trace amounts of elements such as iron, titanium, cobalt, lead, chromium, vanadium, magnesium, bo
Inclusion (mineral)
…when it comes to gem valuation. They diminish the clarity and value of many gemstones, such as diamonds, and increase the value of others, such as star sapphires. Many colored gemstones are expected to have inclusions which do not greatly affect their values. They are categorized into three types…
Main sapphire-producing countries
Teardrop-shaped blue sapphire
The 193.39 carat Star of Lanka star sapphire
Sapphire ring made c. 1940