Apatite and Calcite Physical Properties

Apatite

Calcite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.16-3.232.67-2.73

1 7.18

1.5 Fracture

Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal to uneven

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

1.6 Cleavage

[0001] indistinct, [1010] indistinct

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

1.7 Mohs Hardness

2 10

1.8 Chemical Composition

Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references

CaCO 3Ulrich Henn and Claudio C.

Apatite and Calcite Chemical Formula

While comparing Apatite 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 Apatite and Calcite chemical formula.

Chemical formula of Apatite- Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references
Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.

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Apatite and Calcite Specific Gravity

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