Calcite and Pyrope Physical Properties

Calcite

Pyrope

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

insoluble in water

1.3 Durability

Not Available

1.4 Specific Gravity

2.67-2.733.62-3.87

1 7.18

1.5 Fracture

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

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

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

None

1.7 Mohs Hardness

37-7.5

2 10

1.8 Chemical Composition

CaCO 3Ulrich Henn and Claudio C.

Mg 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Calcite and Pyrope Chemical Formula

While comparing Calcite and Pyrope 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 Pyrope chemical formula.

Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.
Chemical formula of Pyrope- Mg 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

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Calcite and Pyrope Specific Gravity

Another important criteria for qualitative analysis of gemstones is Calcite and Pyrope Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Calcite and Pyrope Optical Properties during the identification of gemstone. Specific gravity of Calcite is 3.62-3.87 whereas that of Pyrope is 3.62-3.87.