Vishnevite and Legrandite Physical Properties

Vishnevite

Legrandite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

Not Available3.98-4.04

1 7.18

1.5 Fracture

Brittle, Uneven

Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

Perfect

Imperfect, poor one {100}

1.7 Mohs Hardness

5-64.5-5

2 10

1.8 Chemical Composition

Not Available

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

Vishnevite and Legrandite Chemical Formula

While comparing Vishnevite and Legrandite 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 Vishnevite and Legrandite chemical formula.

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

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Vishnevite and Legrandite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Vishnevite and Legrandite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vishnevite and Legrandite Optical Properties during the identification of gemstone. Specific gravity of Vishnevite is 3.98-4.04 whereas that of Legrandite is 3.98-4.04.