Tenacity
Brittle
-
Solubility
insoluble
-
Durability
-
-
Specific Gravity
6.86-7.032.69-2.72
1
7.18
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Fracture
Subconchoidal, Uneven, Conchoidal, Irregular
Uneven, Conchoidal
Cleavage
{100} imperfect, {110} indistinct; partings on {111} or {011}
Perfect on {001}, less perfect on {010}, intersecting at near 90°; distinct on {110}
Mohs Hardness
6-76-6.5
2
10
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Chemical Composition
SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Na,Ca)1-2Si3-2O8