Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.90-3.003.95-4.10
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Uneven
Cleavage
None
{110} Perfect, {110} Perfect, {110} Perfect
Mohs Hardness
5-5.53.5-4
2
10
👆🏻
Chemical Composition
CaBSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references