Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.95-3.073.05-3.08
1
7.18
👆🏻
Fracture
Conchoidal
Subconchoidal, Uneven, Conchoidal
Cleavage
Perfect on {110} at 56° and 124°; partings on {010} and {100}
Poor on {100}
Mohs Hardness
5-65
2
10
👆🏻
Chemical Composition
Ca 2Mg 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)