Legrandite and Cinnabar Physical Properties

Legrandite

Cinnabar

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

Brittle

3.98-4.04

Conchoidal

Imperfect, poor one {100}

4.5-5

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

Slightly sectile

1.04 x 10⁻²⁵ g per 100 ml water (Ksp at 25°C = 2 x 10⁻³²)

Uneven

Prismatic {10 1 0}, perfect

2-2.5

HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Legrandite and Cinnabar Chemical Formula

While comparing Legrandite and Cinnabar 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 Cinnabar 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 Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Legrandite and Cinnabar Specific Gravity

Another important criteria for qualitative analysis of gemstones is Legrandite and Cinnabar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Legrandite and Cinnabar Optical Properties during the identification of gemstone. Specific gravity of Legrandite is 2 whereas that of Cinnabar is 2.