Tenacity
-
Brittle
Solubility
-
insoluble
Durability
-
-
Specific Gravity
2.08-2.166.86-7.03
1
7.18
👆🏻
Fracture
Irregular/uneven
Subconchoidal, Uneven, Conchoidal, Irregular
Cleavage
distinct/good on {1011}
{100} imperfect, {110} indistinct; partings on {111} or {011}
Mohs Hardness
4.56-7
2
10
👆🏻
Chemical Composition
CaAl 2Si 4O 12 -6H 2OArthur Thomas , Gemstones (2009)
SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references