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Sard
Sard

Erythrite
Erythrite



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Sard
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Erythrite

Sard and Erythrite Physical Properties

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Physical Properties

Tenacity

-
Sectile

Solubility

-
-

Durability

-
-

Specific Gravity

2.58-2.633.06
1 7.18
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Fracture

Conchoidal
Sectile

Cleavage

None
Perfect on {010}; poor on {100} and { 1 02}.

Mohs Hardness

6.5-7-9999
2 10
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Chemical Composition

SiO 2Ulrich Henn and Claudio C.
Co3(AsO4)2•8(H2O)

Sard and Erythrite Chemical Formula

While comparing Sard and Erythrite 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 Sard and Erythrite chemical formula.

  • Chemical formula of Sard- SiO 2Ulrich Henn and Claudio C.
  • Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)

Sard and Erythrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sard and Erythrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sard and Erythrite Optical Properties during the identification of gemstone. Specific gravity of Sard is 3.06 whereas that of Erythrite is 3.06.