Tenacity
Brittle
-
Solubility
insoluble
insoluble
Durability
-
-
Specific Gravity
6.86-7.032.36
1
7.18
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Fracture
Subconchoidal, Uneven, Conchoidal, Irregular
Uneven, Subconchoidal, Fibrous
Cleavage
{100} imperfect, {110} indistinct; partings on {111} or {011}
[110] perfect, [101] good, [010] distinct
Mohs Hardness
6-73.5-4
2
10
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Chemical Composition
SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Al 3(PO 4) 2(OH,F) 3 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references