Lazulite and Erythrite Physical Properties

Lazulite

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

3.04-3.173.06

1 7.18

1.5 Fracture

Uneven, Uneven, Gemstones of the world (2001) More from other references

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

1.6 Cleavage

{001} Indistinct, {???} Indistinct

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

1.7 Mohs Hardness

5.5Not Available

2 10

1.8 Chemical Composition

(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references

Co3(AsO4)2•8(H2O)

Lazulite and Erythrite Chemical Formula

While comparing Lazulite 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 Lazulite and Erythrite chemical formula.

Chemical formula of Lazulite- (Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references
Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)

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Lazulite and Erythrite Specific Gravity

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