Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.54-2.782.98-3.10
1
7.18
👆🏻
Fracture
Conchoidal
Sub-Conchoidal, Irregular/uneven, Uneven, Conchoidal
Cleavage
Good in three directions
[100] Perfect, [110] Good, [011] Distinct
Mohs Hardness
5-66
2
10
👆🏻
Chemical Composition
K(Ca,Na) 2Si 4O 10(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Li,Na)Al(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth edition (2006) More from other references