Scapolite and Erythrite Physical Properties

Scapolite

Erythrite

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Physical Properties

Tenacity

Sectile

Solubility

Durability

Specific Gravity

2.58-2.743.06

1 7.18

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Fracture

ConchoidalWalter Schumann, Splintery

Sectile

Cleavage

{100} Distinct, {110} Distinct

Perfect on {010}; poor on {100} and { 1 02}.

Mohs Hardness

5.5-6-9999

2 10

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Chemical Composition

Na 4Al 3Si 9O 24Cl to Ca 4Al 6Si 6O 24(CO 3,SO 4)Walter Schumann , Gemstones of the world (2001) More from other references

Co3(AsO4)2•8(H2O)

Scapolite and Erythrite Chemical Formula

While comparing Scapolite 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 Scapolite and Erythrite chemical formula.

Chemical formula of Scapolite- Na 4Al 3Si 9O 24Cl to Ca 4Al 6Si 6O 24(CO 3,SO 4)Walter Schumann , Gemstones of the world (2001) More from other references
Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)

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Scapolite and Erythrite Specific Gravity

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