1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.69-2.723.80-4.15
1
7.18
1.5 Fracture
Uneven, Conchoidal, Gems, Sixth Edition (2006)
Uneven, UnevenArthur Thomas, Gemstones (2009)
1.6 Cleavage
Perfect on {001}, less perfect on {010}, intersecting at near 90°; distinct on {110}
perfect along [010] and [100]
1.7 Mohs Hardness
1.8 Chemical Composition
(Na,Ca)1-2Si3-2O8
Cu 5(SiO 3) 4(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references