Tenacity
-
-
Solubility
Soluble
-
Durability
-
-
Specific Gravity
1.847-1.8523.85-3.94
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal, Uneven
Cleavage
Poor to indistinct on {010}
{010} Good, {100} Distinct
Mohs Hardness
2-35-5.5
2
10
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Chemical Composition
Ca3Al3(SiO4)3(OH)
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)