Tenacity
-
Brittle
Solubility
-
insoluble
Durability
-
-
Specific Gravity
2.60-3.026.86-7.03
1
7.18
👆🏻
Fracture
-
Subconchoidal, Uneven, Conchoidal, Irregular
Cleavage
Perfect
{100} imperfect, {110} indistinct; partings on {111} or {011}
Mohs Hardness
-99996-7
2
10
👆🏻
Chemical Composition
(Mg,Fe2+ ) 5Al(Si 3Al)O 10(OH) 8Anthony et al , Handbook of mineralogy (2001)
SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references