2 Physical Properties
2.2 Tenacity
Not Available
Not Available
2.4 Solubility
Not Available
Not Available
2.7 Durability
Not Available
Not Available
2.9 Specific Gravity
3.77-3.932.66-2.86
1
7.18
2.17 Fracture
Gems, Conchoidal, Brittle
ConchoidalWalter Schumann, Gemstones of the world (2001), ConchoidalWalter Schumann, Gemstones of the world (2001)
2.18 Cleavage
2.19 Mohs Hardness
2.20 Chemical Composition
Ca 3Ti4+2(Fe3+2Si)O 12Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Al 2Be 3Si 6O 18Martin H.