Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.20-2.262.90-2.98
1
7.18
👆🏻
Fracture
Uneven
Conchoidal
Cleavage
Perfect on {110}
Rare tabular and prismatic crystals. Usually occurs as fibrous, parallel veins that break off into cleavage fragments.
Mohs Hardness
5-5.53.5
2
10
👆🏻
Chemical Composition
Na 2[Al 2Si 3O 10] · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references