1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.5 Durability
Not Available
Not Available
1.7 Specific Gravity
5.85-6.152.72-2.83
1
7.18
1.8 Fracture
Conchoidal, Metallic, UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
1.9 Cleavage
Fair in four directions forming octahedrons
Good on {100} and {110}
1.10 Mohs Hardness
1.11 Chemical Composition
Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Na 2(Ti,Fe)Si 4(O,F) 11Ulrich Henn and Claudio C.