Faustite

Faustite is a massive, bright green, zinc-rich member of the Turquoise group that is mined near near Neynschabour, Iran. It is the same structure as Turquoise but the copper element has been replaced by zinc.
General Information
Chemical Formula
(Zn,Cu)Al
 
6
(PO
 
4
)
 
4
(OH)
 
8
 · 4H
 
2
O
Michael O’Donoghue, Gems, Sixth Edition (2006)
Mohs Hardness
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