1 Physical Properties
1.1 Tenacity
1.4 Solubility
1.7 Durability
Not Available
Not Available
1.9 Specific Gravity
1.17 Fracture
Not Available
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle
1.18 Cleavage
Not Available
Perfect in three directions
1.19 Mohs Hardness
1.20 Chemical Composition
Not Available
CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references