Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.90-3.102.98-3.10
1
7.18
👆🏻
Fracture
Splintery, Granular
Sub-Conchoidal, Irregular/uneven, Uneven, Conchoidal
Cleavage
None
[100] Perfect, [110] Good, [011] Distinct
Mohs Hardness
6-6.56
2
10
👆🏻
Chemical Composition
Ca 2(Mg,Fe) 5(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references
(Li,Na)Al(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth edition (2006) More from other references