Gahnite and Calcite Physical Properties

Gahnite

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

4.00-4.622.67-2.73

1 7.18

1.5 Fracture

Conchoidal, Uneven

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

1.6 Cleavage

Indistinct parting on [111]

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

1.7 Mohs Hardness

7.5-83

2 10

1.8 Chemical Composition

ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

CaCO 3Ulrich Henn and Claudio C.

Gahnite and Calcite Chemical Formula

While comparing Gahnite 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 Gahnite and Calcite chemical formula.

Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.

Compare Blue Gemstones

Gahnite Vs Howlite

Gahnite Vs Hydrogrossular

Gahnite Vs Indicolite Blue Tourmaline

Gahnite and Calcite Specific Gravity

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