Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
1.65-1.993.85-3.94
1
7.18
👆🏻
Fracture
Uneven
Conchoidal, Uneven
Cleavage
{010} Perfect, {110} Perfect
{010} Good, {100} Distinct
Mohs Hardness
2-2.55-5.5
2
10
👆🏻
Chemical Composition
NaCaB 5O 6(OH) 6 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)