Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.60-3.612.58-2.74
1
7.18
👆🏻
Fracture
Conchoidal
ConchoidalWalter Schumann, Splintery
Cleavage
Imperfect/fair/absent
{100} Distinct, {110} Distinct
Mohs Hardness
8-8.55.5-6
2
10
👆🏻
Chemical Composition
Mg 3Al 8BeO 16Walter Schumann , Gemstones of the world (2001) More from other references
Na 4Al 3Si 9O 24Cl to Ca 4Al 6Si 6O 24(CO 3,SO 4)Walter Schumann , Gemstones of the world (2001) More from other references