1 Physical Properties
1.1 Tenacity
1.2 Solubility
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
Not Available2.90-2.98
1
7.18
2.7 Fracture
(e.g. graphite).
Conchoidal, Brittle, Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
2.8 Cleavage
{???} Imperfect, {???} Imperfect
Rare tabular and prismatic crystals. Usually occurs as fibrous, parallel veins that break off into cleavage fragments.
2.9 Mohs Hardness
2.13 Chemical Composition
Not Available
CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references