Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.40-2.423.90-4.00
1
7.18
👆🏻
Fracture
-
Conchoidal
Cleavage
{010} Perfect, {001} Distinct
Perfect on {001}, good on {210}, poor on {010}
Mohs Hardness
4.53-3.5
2
10
👆🏻
Chemical Composition
Ca 2B 6O 11 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references