1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.3 Solubility
Not Available
Not Available
1.5 Durability
Not Available
Not Available
1.6 Specific Gravity
3.76-3.771.98-2.50
1
7.18
1.7 Fracture
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009)
Conchoidal, Conchoidal, Gemstones of the world (2001)
1.8 Cleavage
{110} Perfect, {110} Perfect
Not Available
1.9 Mohs Hardness
1.12 Chemical Composition
(Fe,Mn) 7Si 7O 21Ulrich Henn and Claudio C.
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)