Tenacity
-
Brittle
Solubility
-
insoluble
Durability
-
-
Specific Gravity
2.60-2.646.86-7.03
1
7.18
👆🏻
Fracture
Uneven, Splintery, Conchoidal
Subconchoidal, Uneven, Conchoidal, Irregular
Cleavage
Absent
{100} imperfect, {110} indistinct; partings on {111} or {011}
Mohs Hardness
6.5-76-7
2
10
👆🏻
Chemical Composition
SiO 2Arthur Thomas , Gemstones (2009)
SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references