Willemite and Calcite Physical Properties

Willemite

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

3.89-4.18

2.67-2.73

1.5 Fracture

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven

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

1.6 Cleavage

{0001}, {11 2 0} imperfect

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

1.7 Mohs Hardness

5.5

1.8 Chemical Composition

Zn 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

CaCO 3Ulrich Henn and Claudio C.

Willemite and Calcite Chemical Formula

While comparing Willemite 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 Willemite and Calcite chemical formula.

Chemical formula of Willemite- Zn 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.

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Willemite and Calcite Specific Gravity

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