Calcite and Spinel Physical Properties

Calcite

Spinel

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

none

1.3 Durability

Not Available

1.4 Specific Gravity

2.67-2.733.64-3.66

1 7.18

1.5 Fracture

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

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

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

None, but may exhibit slight parting

1.7 Mohs Hardness

2 10

1.8 Chemical Composition

CaCO 3Ulrich Henn and Claudio C.

MgAl₂O₄

Calcite and Spinel Chemical Formula

While comparing Calcite and Spinel 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 Spinel chemical formula.

Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.
Chemical formula of Spinel- MgAl₂O₄

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Calcite and Spinel Specific Gravity

Another important criteria for qualitative analysis of gemstones is Calcite and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Calcite and Spinel Optical Properties during the identification of gemstone. Specific gravity of Calcite is 3.64-3.66 whereas that of Spinel is 3.64-3.66.