Faustite and Erythrite Physical Properties

Faustite

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

2.93.06

1 7.18

1.5 Fracture

Conchoidal, ConchoidalAnthony et al, Conchoidal, Brittle, Conchoidal

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

1.6 Cleavage

{???} Indistinct

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

1.7 Mohs Hardness

4.5Not Available

2 10

1.8 Chemical Composition

(Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Co3(AsO4)2•8(H2O)

Faustite and Erythrite Chemical Formula

While comparing Faustite 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 Faustite and Erythrite chemical formula.

Chemical formula of Faustite- (Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)

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Faustite and Erythrite Specific Gravity

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