1 Physical Properties
1.1 Tenacity
BrittleWalter Schumann
Brittle
1.2 Solubility
hot salt water
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.98-2.255.50-5.90
1
7.18
1.7 Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
1.8 Cleavage
None
On {10 1 0}, perfect; parting on {000 1 }
1.9 Mohs Hardness
1.13 Chemical Composition
SiO2 · nH2O
(Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)