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Willemite
Willemite

Sellaite
Sellaite



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Willemite
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Sellaite

Willemite and Sellaite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
3.89-4.18
Conchoidal, Uneven
{0001}, {11 2 0} imperfect
5.5
Zn 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
 
Brittle
-
-
3.14-3.16
Conchoidal
Perfect on {010} and {110}
5-5.5
MgF 2Ulrich Henn and Claudio C.

Willemite and Sellaite Chemical Formula

While comparing Willemite and Sellaite 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 Sellaite chemical formula.

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Willemite and Sellaite Specific Gravity

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