Annabergite and Calcite Physical Properties

Annabergite

Calcite

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1 Physical Properties

1.1 Tenacity

Sectile

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.072.67-2.73

1 7.18

1.5 Fracture

Brittle, Metallic, Brittle, Metallic, Brittle, Metallic

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

1.6 Cleavage

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

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

1.7 Mohs Hardness

2 10

1.8 Chemical Composition

Ni3(AsO4)2•8(H2O)

CaCO 3Ulrich Henn and Claudio C.

Annabergite and Calcite Chemical Formula

While comparing Annabergite 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 Annabergite and Calcite chemical formula.

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

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Annabergite and Calcite Specific Gravity

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