Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.03-3.182.98-3.10
1
7.18
👆🏻
Fracture
Uneven, Irregular, Conchoidal
Sub-Conchoidal, Irregular/uneven, Uneven, Conchoidal
Cleavage
{???} Indistinct
[100] Perfect, [110] Good, [011] Distinct
Mohs Hardness
7-7.56
2
10
👆🏻
Chemical Composition
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
(Li,Na)Al(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth edition (2006) More from other references