1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009)
Uneven, UnevenAnthony et al, Handbook of mineralogy (2001)
1.6 Cleavage
{110} Perfect, {110} Perfect
[001] perfect; [100] distinct
1.7 Mohs Hardness
1.8 Chemical Composition
(Fe,Mn) 7Si 7O 21Ulrich Henn and Claudio C.
Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)