Anhydrite and Erythrite Physical Properties

Anhydrite

Erythrite

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1 Physical Properties

1.1 Tenacity

Brittle

Sectile

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-2.983.06

1 7.18

1.5 Fracture

Conchoidal, Brittle, Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal

Sectile Curved shavings or scrapings produced by a knife blade, (e.g. graphite).

1.6 Cleavage

Rare tabular and prismatic crystals. Usually occurs as fibrous, parallel veins that break off into cleavage fragments.

Perfect on {010}; poor on {100} and { 1 02}.

1.7 Mohs Hardness

3.5Not Available

2 10

1.8 Chemical Composition

CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

Co3(AsO4)2•8(H2O)

Anhydrite and Erythrite Chemical Formula

While comparing Anhydrite and Erythrite 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 Erythrite chemical formula.

Chemical formula of Anhydrite- CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)

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Anhydrite and Erythrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Anhydrite and Erythrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Anhydrite and Erythrite Optical Properties during the identification of gemstone. Specific gravity of Anhydrite is 3.06 whereas that of Erythrite is 3.06.