Sapphire

Sapphire is a gemstone variety of the aluminum oxide mineral corundum (Al2O3). It often has a blue color (the Greek word sappheiros translates to ‘blue stone’ in English), which is the result of the incorporation of trace amounts of iron in the mineral structure. Sapphire is a precious stone commonly used in jewelry, together with ruby, emerald and diamond.


Information source: Mindat.org

Image: Sapphire crystals found in Pakistan. Source: Parent Géry, Wikimedia Commons.

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