Dravite and Cinnabar Physical Properties

Dravite

Cinnabar

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Physical Properties

Tenacity

Slightly sectile

Solubility

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

Durability

Specific Gravity

3.03-3.182

1 7.18

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Fracture

Uneven, Irregular, Conchoidal

Uneven

Cleavage

{???} Indistinct

Prismatic {10 1 0}, perfect

Mohs Hardness

7-7.52-2.5

2 10

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Chemical Composition

Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

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

Dravite and Cinnabar Chemical Formula

While comparing Dravite 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 Dravite and Cinnabar chemical formula.

Chemical formula of Dravite- Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Dravite and Cinnabar Specific Gravity

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