Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.20-2.263.95-4.10
1
7.18
👆🏻
Fracture
Uneven
Uneven
Cleavage
Perfect on {110}
{110} Perfect, {110} Perfect, {110} Perfect
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
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references