Anhydrite and Calcite Physical Properties

Anhydrite

Calcite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-2.98

2.67-2.73

1.5 Fracture

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

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

1.6 Cleavage

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

Perfect on [10 1 1] three directions with angle of 74° 55

1.7 Mohs Hardness

3.5

1.8 Chemical Composition

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

CaCO 3Ulrich Henn and Claudio C.

Anhydrite and Calcite Chemical Formula

While comparing Anhydrite and Calcite 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 Calcite chemical formula.

Chemical formula of Anhydrite- CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.

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Anhydrite and Calcite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Anhydrite and Calcite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Anhydrite and Calcite Optical Properties during the identification of gemstone. Specific gravity of Anhydrite is 2.67-2.73 whereas that of Calcite is 2.67-2.73.