Willemite and Anorthite Physical Properties

Willemite

Anorthite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.89-4.182.77

1 7.18

1.5 Fracture

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven

Uneven, Uneven, Gems, Sixth Edition (2006)

1.6 Cleavage

{0001}, {11 2 0} imperfect

Perfect [001] good [010] poor [110]

1.7 Mohs Hardness

5.56-6.5

2 10

1.8 Chemical Composition

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

CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Willemite and Anorthite Chemical Formula

While comparing Willemite and Anorthite 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 Anorthite chemical formula.

Chemical formula of Willemite- Zn 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Anorthite- CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

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Willemite Vs Garnet Color Change

Willemite and Anorthite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Willemite and Anorthite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Willemite and Anorthite Optical Properties during the identification of gemstone. Specific gravity of Willemite is 2.77 whereas that of Anorthite is 2.77.