1 Physical Properties
1.1 Tenacity
1.2 Solubility
insoluble in water
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.51-2.635.85-6.15
1
7.18
1.5 Fracture
Fibrous
Conchoidal, Metallic, UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
1.6 Cleavage
Not Available
Fair in four directions forming octahedrons
1.7 Mohs Hardness
1.8 Chemical Composition
Mg 3(Si 2O 5)(OH) 4Gemdat.org , Management Team (2012)
Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references