1 Physical Properties
1.1 Tenacity
1.2 Solubility
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.60-3.022.20-2.40
1
7.18
1.5 Fracture
Uneven
Conchoidal, Splintery, Fibrous, UnevenArthur Thomas, Gemstones (2009)
1.6 Cleavage
{001} Perfect
Perfect on {010}, distinct on {100}
1.7 Mohs Hardness
1.8 Chemical Composition
(Mg,Fe2+ ) 5Al(Si 3Al)O 10(OH) 8Anthony et al , Handbook of mineralogy (2001)
CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)