Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.95-3.072.60-2.65
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, Conchoidal
Cleavage
Perfect on {110} at 56° and 124°; partings on {010} and {100}
Perfect on {001}, very good on {010}, imperfect on {110}
Mohs Hardness
5-66-6.5
2
10
👆🏻
Chemical Composition
Ca 2Mg 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)