Tenacity
-
-
Solubility
-
insoluble
Durability
-
-
Specific Gravity
3.04-3.262.36
1
7.18
👆🏻
Fracture
Splintery, Uneven
Uneven, Subconchoidal, Fibrous
Cleavage
{110} perfect
[110] perfect, [101] good, [010] distinct
Mohs Hardness
5-63.5-4
2
10
👆🏻
Chemical Composition
NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Al 3(PO 4) 2(OH,F) 3 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references