Anhydrite and Petalite Physical Properties
Solubility
Not Available
insoluble
Durability
Not Available
Not Available
Specific Gravity
2.90-2.98
2.40
Fracture
Conchoidal, Brittle, Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Subconchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal
Cleavage
Rare tabular and prismatic crystals. Usually occurs as fibrous, parallel veins that break off into cleavage fragments.
Perfect on {001}, poor on {201} with 38.5° angle between the two
Chemical Composition
CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Anhydrite and Petalite Chemical Formula
While comparing Anhydrite and Petalite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Anhydrite and Petalite chemical formula.
- Chemical formula of Anhydrite- CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
- Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Anhydrite and Petalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Anhydrite and Petalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Anhydrite and Petalite Optical Properties during the identification of gemstone. Specific gravity of Anhydrite is 2.40 whereas that of Petalite is 2.40.