Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.95-3.073.1-3.2
1
7.18
👆🏻
Fracture
Conchoidal
-
Cleavage
Perfect on {110} at 56° and 124°; partings on {010} and {100}
Vitreous, pearly on cleavage
Mohs Hardness
5-63-4
2
10
👆🏻
Chemical Composition
Ca 2Mg 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references