Tenacity
Brittle
-
Solubility
Soluble
-
Durability
-
-
Specific Gravity
2.95-2.963.1-3.2
1
7.18
👆🏻
Fracture
Conchoidal
-
Cleavage
None
Vitreous, pearly on cleavage
Mohs Hardness
7-7.53-4
2
10
👆🏻
Chemical Composition
Mg 3B 7O 13ClMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references