Calcite and Dravite Physical Properties

Calcite

Dravite

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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

2.67-2.733.03-3.18

1 7.18

1.5 Fracture

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

Uneven, Uneven, Irregular, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle

1.6 Cleavage

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

{???} Indistinct

1.7 Mohs Hardness

37-7.5

2 10

1.8 Chemical Composition

CaCO 3Ulrich Henn and Claudio C.

Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

Calcite and Dravite Chemical Formula

While comparing Calcite and Dravite 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 Dravite chemical formula.

Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.
Chemical formula of Dravite- Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

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Calcite and Dravite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Calcite and Dravite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Calcite and Dravite Optical Properties during the identification of gemstone. Specific gravity of Calcite is 3.03-3.18 whereas that of Dravite is 3.03-3.18.