Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.30-2.405.9-6.3
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Conchoidal, Uneven
Cleavage
{110} Perfect
On {101}, distinct; on {112}, interrupted; on {001}, indistinct
Mohs Hardness
-99994.5-5
2
10
👆🏻
Chemical Composition
Na 8Al 6Si 6O 24(SO 4) · H 2OAnthony et al , Handbook of Mineralogy (2001)
CaWO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references