1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.95-4.033.80-4.15
1
7.18
2.7 Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)
Uneven, UnevenArthur Thomas, Gemstones (2009)
2.8 Cleavage
None, but may exhibit parting
perfect along [010] and [100]
2.9 Mohs Hardness
2.16 Chemical Composition
Al 2 O 3
Cu 5(SiO 3) 4(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references