Calcite and Labradorite Physical Properties

Calcite

Labradorite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.67-2.732.69-2.72

1 7.18

1.5 Fracture

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

Uneven, Conchoidal, Gems, Sixth Edition (2006)

1.6 Cleavage

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

Perfect on {001}, less perfect on {010}, intersecting at near 90°; distinct on {110}

1.7 Mohs Hardness

36-6.5

2 10

1.8 Chemical Composition

CaCO 3Ulrich Henn and Claudio C.

(Na,Ca)_1-2Si_3-2O₈

Calcite and Labradorite Chemical Formula

While comparing Calcite and Labradorite 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 Labradorite chemical formula.

Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.
Chemical formula of Labradorite- (Na,Ca)_1-2Si_3-2O₈

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Calcite and Labradorite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Calcite and Labradorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Calcite and Labradorite Optical Properties during the identification of gemstone. Specific gravity of Calcite is 2.69-2.72 whereas that of Labradorite is 2.69-2.72.