Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.20-3.303.05-3.08
1
7.18
👆🏻
Fracture
-
Subconchoidal, Uneven, Conchoidal
Cleavage
Perfect
Poor on {100}
Mohs Hardness
5-65
2
10
👆🏻
Chemical Composition
Ca 2(Mg,Fe,Mn,Al) 2(SiO 4)(Si 2O 7)(OH) 2 · H 2OUlrich Henn and Claudio C.
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)