1 Physical Properties
1.2 Tenacity
1.4 Solubility
Not Available
Not Available
1.6 Durability
Not Available
Not Available
1.8 Specific Gravity
2.57-2.662.97-3.03
1
7.18
1.9 Fracture
Subconchoidal, Conchoidal, Brittle
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle
1.10 Cleavage
Fair on {100}, poor on {001} and {010}
{001} Poor
1.12 Mohs Hardness
1.15 Chemical Composition
Mg2Al4Si5O18
CaB 2(SiO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references