ZOISITE
Calcium aluminium hydroxysilicate
Zoisite occurs in a number of varieties, the most sought-after being tanzanite, a variety coloured sapphire-blue by the presence of vanadium.
![]() tanzanite A massive green variety of zoisite (top), containing rubies and occasionally dark hornblende inclusions, may be polished, carved, or tumbled to make ornaments or an attractive decorative stone. Discovered by Baron von Zois in the Sau-Alp mountains of Austria, zoisite was first called saualpite. Hardness: 6 1/2
![]() Look what I found! Isn't this lovely! It'll cost you a mere $2,450 from a company called Fire and Ice.
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