Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.82-3.972.9
1
7.18
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Fracture
Subconchoidal, Conchoidal
Conchoidal
Cleavage
Perfect on [001] and [011]
{???} Indistinct
Mohs Hardness
5.5-64.5
2
10
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Chemical Composition
TiO 2Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
(Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)