Epidote and Cinnabar Physical Properties

Epidote

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

3.25-3.502

1 7.18

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Fracture

Conchoidal, Fibrous

Uneven

Cleavage

{001} perfect and {100} imperfect

Prismatic {10 1 0}, perfect

Mohs Hardness

6-72-2.5

2 10

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Chemical Composition

CaAl 2(Fe3+ ,Al)Si 3O 12(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Epidote and Cinnabar Chemical Formula

While comparing Epidote 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 Epidote and Cinnabar chemical formula.

Chemical formula of Epidote- CaAl 2(Fe3+ ,Al)Si 3O 12(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Brown Gemstones

Epidote Vs Gedrite

Epidote Vs Goethite

Epidote Vs Hessonite

Epidote and Cinnabar Specific Gravity

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