1 Physical Properties
1.2 Tenacity
1.3 Solubility
Not Available
Not Available
1.4 Durability
Not Available
Not Available
1.6 Specific Gravity
2.90-3.002.58-2.64
1
7.18
1.9 Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Metallic
Gemstones of the world (2001)
1.10 Cleavage
1.11 Mohs Hardness
1.12 Chemical Composition
CaBSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
SiO 2Walter Schumann , Gemstones of the world (2001)