Willemite and Sylvite Physical Properties

Willemite

Sylvite

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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

3.89-4.181.993

1 7.18

1.5 Fracture

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven

Uneven, Brittle

1.6 Cleavage

{0001}, {11 2 0} imperfect

Perfect on [100], [010], [001]

1.7 Mohs Hardness

5.52.5

2 10

1.8 Chemical Composition

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

Not Available

Willemite and Sylvite Chemical Formula

While comparing Willemite and Sylvite 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 Sylvite chemical formula.

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

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Willemite and Sylvite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Willemite and Sylvite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Willemite and Sylvite Optical Properties during the identification of gemstone. Specific gravity of Willemite is 1.993 whereas that of Sylvite is 1.993.