Apophyllite and Erythrite Physical Properties

Apophyllite

Erythrite

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1 Physical Properties

1.1 Tenacity

Not Available

Sectile

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.30-2.503.06

1 7.18

1.5 Fracture

Uneven, UnevenArthur Thomas, Gemstones (2009)

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

1.6 Cleavage

Perfect on (001)

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

1.7 Mohs Hardness

4.5-5Not Available

2 10

1.8 Chemical Composition

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

Co3(AsO4)2•8(H2O)

Apophyllite and Erythrite Chemical Formula

While comparing Apophyllite 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 Apophyllite and Erythrite chemical formula.

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

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Apophyllite and Erythrite Specific Gravity

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