Erythrite and Anhydrite Physical Properties
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.06
2.90-2.98
Fracture
Sectile Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Conchoidal, Brittle, Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Cleavage
Perfect on {010}; poor on {100} and { 1 02}.
Rare tabular and prismatic crystals. Usually occurs as fibrous, parallel veins that break off into cleavage fragments.
Mohs Hardness
Not Available
3.5
Chemical Composition
Co3(AsO4)2•8(H2O)
CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Erythrite and Anhydrite Chemical Formula
While comparing Erythrite and Anhydrite 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 Erythrite and Anhydrite chemical formula.
- Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)
- Chemical formula of Anhydrite- CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Erythrite and Anhydrite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Erythrite and Anhydrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Erythrite and Anhydrite Optical Properties during the identification of gemstone. Specific gravity of Erythrite is 2.90-2.98 whereas that of Anhydrite is 2.90-2.98.