Tenacity
-
Brittle
Solubility
insoluble in water
insoluble
Durability
-
-
Specific Gravity
2.51-2.636.86-7.03
1
7.18
👆🏻
Fracture
Fibrous
Subconchoidal, Uneven, Conchoidal, Irregular
Cleavage
Perfect basal
{100} imperfect, {110} indistinct; partings on {111} or {011}
Mohs Hardness
2.5-4.56-7
2
10
👆🏻
Chemical Composition
Mg 3(Si 2O 5)(OH) 4Gemdat.org , Management Team (2012)
SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references