Erythrite and Gedrite Physical Properties

Erythrite

Gedrite

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Physical Properties

Tenacity

Sectile

Solubility

Durability

Specific Gravity

3.063.15-3.259

1 7.18

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Fracture

Sectile

Cleavage

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

Gedrite Magnesiogedrite , Comments: Dark gray cleavage fragment of magnesiogedrite (gedrite). , Location: Bamble, Telemark, Norway. , Scale: See Image.

Mohs Hardness

-99995.5-6

2 10

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Chemical Composition

Co3(AsO4)2•8(H2O)

(Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)

Erythrite and Gedrite Chemical Formula

While comparing Erythrite and Gedrite 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 Gedrite chemical formula.

Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)
Chemical formula of Gedrite- (Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)

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Erythrite and Gedrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Erythrite and Gedrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Erythrite and Gedrite Optical Properties during the identification of gemstone. Specific gravity of Erythrite is 3.15-3.259 whereas that of Gedrite is 3.15-3.259.