Calcite and Annabergite Physical Properties

Calcite

Annabergite

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1 Physical Properties

1.1 Tenacity

Brittle

Sectile

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.67-2.73

3.07

1.5 Fracture

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

Brittle, Metallic, Brittle, Metallic, Brittle, Metallic

1.6 Cleavage

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

Perfect on {010}, indistinct on {100} and {102}

1.7 Mohs Hardness

1.8 Chemical Composition

CaCO 3Ulrich Henn and Claudio C.

Ni3(AsO4)2•8(H2O)

Calcite and Annabergite Chemical Formula

While comparing Calcite and Annabergite 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 Calcite and Annabergite chemical formula.

Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.
Chemical formula of Annabergite- Ni3(AsO4)2•8(H2O)

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Calcite and Annabergite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Calcite and Annabergite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Calcite and Annabergite Optical Properties during the identification of gemstone. Specific gravity of Calcite is 3.07 whereas that of Annabergite is 3.07.