Tenacity
Brittle
Brittle
Solubility
-
Poorly soluble in dilute HCl
Durability
-
-
Specific Gravity
2.20-2.262.80-2.95
1
7.18
👆🏻
Fracture
Uneven
Conchoidal
Cleavage
Perfect on {110}
Perfect on {10 1 1}, rhombohedral cleavage
Mohs Hardness
5-5.53.5-4
2
10
👆🏻
Chemical Composition
Na 2[Al 2Si 3O 10] · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaMg(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references