1 Physical Properties
1.1 Tenacity
1.3 Solubility
Not Available
Not Available
1.4 Durability
Not Available
Not Available
1.6 Specific Gravity
1.98-2.505.85-6.15
1
7.18
1.9 Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001)
Conchoidal, Metallic, UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
1.10 Cleavage
Not Available
Fair in four directions forming octahedrons
1.11 Mohs Hardness
1.12 Chemical Composition
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references