Tenacity
-
-
Solubility
Soluble
-
Durability
-
-
Specific Gravity
1.847-1.8523.05-3.21
1
7.18
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Fracture
Conchoidal
Uneven, Subconchoidal, Splintery
Cleavage
Poor to indistinct on {010}
Good on {110}, poor on {100}
Mohs Hardness
2-37.5
2
10
👆🏻
Chemical Composition
Ca3Al3(SiO4)3(OH)
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references