Tenacity
-
-
Solubility
-
Insoluble in acids
Durability
-
-
Specific Gravity
3.07-3.134.20-4.30
1
7.18
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Fracture
Conchoidal, Uneven
Uneven, Conchoidal
Cleavage
{100} Perfect, {010} Distinct, {102} Distinct
{110} good, 100 moderate, parting on {092} and {011}
Mohs Hardness
3-3.56-6.5
2
10
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Chemical Composition
Zn 2(Fe2+ ,Mn2+ )(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)