Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
1.98-2.25
2.91
Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references
Handbook of mineralogy (2001)
Cleavage
Not Available
None
Mohs Hardness
5-6.5
Not Available
Chemical Composition
SiO 2 · nH 2OGemdat.org , Management Team (2012)
(Ca,Mn2+ ) 2(SiO 3OH)(OH)Anthony et al , Handbook of Mineralogy (2001)
