Tenacity
Brittle
-
Solubility
Soluble
-
Durability
-
-
Specific Gravity
2.95-2.963.85-3.94
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal, Uneven
Cleavage
None
{010} Good, {100} Distinct
Mohs Hardness
7-7.55-5.5
2
10
👆🏻
Chemical Composition
Mg 3B 7O 13ClMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)