Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.20-2.263.1-3.2
1
7.18
👆🏻
Fracture
Uneven
-
Cleavage
Perfect on {110}
Vitreous, pearly on cleavage
Mohs Hardness
5-5.53-4
2
10
👆🏻
Chemical Composition
Na 2[Al 2Si 3O 10] · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references