Tenacity
Brittle
-
Solubility
insoluble
-
Durability
-
-
Specific Gravity
6.86-7.032.74-2.76
1
7.18
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Fracture
Subconchoidal, Uneven, Conchoidal, Irregular
Uneven
Cleavage
{100} imperfect, {110} indistinct; partings on {111} or {011}
{010} Perfect, {001} 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
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)