Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.90-4.002.81
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
Perfect on {001}, good on {210}, poor on {010}
{001} Perfect
Mohs Hardness
3-3.54.5-5
2
10
👆🏻
Chemical Composition
SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
NaAl 3(PO 4) 2(OH) 4 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references