Erythrite and Apophyllite Physical Properties

Erythrite

Apophyllite

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1 Physical Properties

1.1 Tenacity

Sectile

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.062.30-2.50

1 7.18

1.5 Fracture

Sectile Curved shavings or scrapings produced by a knife blade, (e.g. graphite).

Uneven, UnevenArthur Thomas, Gemstones (2009)

1.6 Cleavage

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

Perfect on (001)

1.7 Mohs Hardness

Not Available4.5-5

2 10

1.8 Chemical Composition

Co3(AsO4)2•8(H2O)

KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.

Erythrite and Apophyllite Chemical Formula

While comparing Erythrite and Apophyllite 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 Erythrite and Apophyllite chemical formula.

Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)
Chemical formula of Apophyllite- KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.

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Erythrite and Apophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Erythrite and Apophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Erythrite and Apophyllite Optical Properties during the identification of gemstone. Specific gravity of Erythrite is 2.30-2.50 whereas that of Apophyllite is 2.30-2.50.