1 Physical Properties
1.1 Tenacity
1.2 Solubility
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.82-4.002.67-2.73
1
7.18
1.5 Fracture
Not Available
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
1.6 Cleavage
{???} Indistinct
Perfect on [10 1 1] three directions with angle of 74° 55
1.7 Mohs Hardness
1.8 Chemical Composition
Mn2+9(SiO 4) 4(OH,F) 2Anthony et al , Handbook of mineralogy (2001)
CaCO 3Ulrich Henn and Claudio C.