Legrandite and Omphacite Physical Properties

Legrandite

Omphacite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

3.98-4.043.16-3.43

1 7.18

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Fracture

Conchoidal

Uneven, Conchoidal

Cleavage

Imperfect, poor one {100}

{110} Good, {110} Good

Mohs Hardness

4.5-55-6

2 10

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Chemical Composition

Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

(Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)

Legrandite and Omphacite Chemical Formula

While comparing Legrandite and Omphacite 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 Legrandite and Omphacite chemical formula.

Chemical formula of Legrandite- Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Omphacite- (Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)

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Legrandite and Omphacite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Legrandite and Omphacite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Legrandite and Omphacite Optical Properties during the identification of gemstone. Specific gravity of Legrandite is 3.16-3.43 whereas that of Omphacite is 3.16-3.43.