Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.05-3.214.33-4.42
1
7.18
👆🏻
Fracture
Uneven, Subconchoidal, Splintery
-
Cleavage
Good on {110}, poor on {100}
Perfect
Mohs Hardness
7.54.5
2
10
👆🏻
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Ca(Nd,Ce,La) 2(CO 3) 3F 2Ulrich Henn and Claudio C.