Grandidierite and Calcite Physical Properties

Grandidierite

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

2.85-3.002.67-2.73

1 7.18

1.5 Fracture

Brittle, UnevenArthur Thomas, Gemstones (2009), Brittle, Uneven

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

1.6 Cleavage

Perfect

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

1.7 Mohs Hardness

7.53

2 10

1.8 Chemical Composition

(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.

CaCO 3Ulrich Henn and Claudio C.

Grandidierite and Calcite Chemical Formula

While comparing Grandidierite 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 Grandidierite and Calcite chemical formula.

Chemical formula of Grandidierite- (Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.

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Grandidierite and Calcite Specific Gravity

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