Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.04-3.263.90-4.00
1
7.18
👆🏻
Fracture
Splintery, Uneven
Conchoidal
Cleavage
{110} perfect
Perfect on {001}, good on {210}, poor on {010}
Mohs Hardness
5-63-3.5
2
10
👆🏻
Chemical Composition
NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references