Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.6-3.33.05-3.08
1
7.18
👆🏻
Fracture
Lamellar
Subconchoidal, Uneven, Conchoidal
Cleavage
Perfect 001
Poor on {100}
Mohs Hardness
2-2.55
2
10
👆🏻
Chemical Composition
(Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)