1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
insoluble in common solvents
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, Brittle
1.6 Cleavage
Indiscernible
{110} Perfect, {???} Distinct, {???} Distinct
1.7 Mohs Hardness
1.8 Chemical Composition
SiO2
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)