Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.20-2.262.98-3.10
1
7.18
👆🏻
Fracture
Uneven
Uneven, Conchoidal
Cleavage
Perfect on {110}
{100} Perfect, {110} Good, {011} Distinct
Mohs Hardness
5-5.55.5-6
2
10
👆🏻
Chemical Composition
Na 2[Al 2Si 3O 10] · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
LiAl(PO 4)(OH,F)Walter Schumann , Gemstones of the world (2001) More from other references