Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.90-3.003.13-3.75
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Subconchoidal, Uneven, Conchoidal
Cleavage
None
Poor on {100}
Mohs Hardness
5-5.56
2
10
👆🏻
Chemical Composition
CaBSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Mg,Fe2+ ) 9(SiO 4) 4(F,OH)) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references