Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.54-2.783.90-4.00
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
Good in three directions
Perfect on {001}, good on {210}, poor on {010}
Mohs Hardness
5-63-3.5
2
10
👆🏻
Chemical Composition
K(Ca,Na) 2Si 4O 10(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references