1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.2 Durability
Not Available
Not Available
1.4 Specific Gravity
2.90-2.983.18-3.37
1
7.18
2.5 Fracture
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001), Brittle
Conchoidal
2.6 Cleavage
Distinct on {11 2 0}, imperfect on {10 1 1}
Perfect on 210
2.8 Mohs Hardness
2.14 Chemical Composition
Be 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Not Available