1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
Not Available5.6-5.76
1
7.18
1.5 Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001)
Uneven, UnevenAnthony et al, Handbook of mineralogy (2001)
1.6 Cleavage
Not Available
[001] perfect; [100] distinct
1.7 Mohs Hardness
1.8 Chemical Composition
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)