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Tanzanite

Tanzanite's name came from the place it was discovered: Tanzania, Africa.

Chemical Formula: HAl₃Ca₂O₁₃Si₃

Other names: Dicalcium trialuminium tris(silicate) hydroxide

Layman's explanation: Tanzanite was discovered in Tanzania, Africa in1967, which is still the only place it can be found. It is a variety of zoisite, which is a calcium aluminum silicate. Due to its rarity and beautiful color, tanzanite is mainly used as a gemstone for jewelry. Tanzanite is trichroic, meaning it shows three different colors depending on the angle viewed; the colors seen are blue, purple or bronze. However the blue color is attributed vanadium impurities.

Keywords: zosite, trichroic, Tanzania

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