Anhydrite and Cinnabar Physical Properties

Anhydrite

Cinnabar

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1 Physical Properties

1.1 Tenacity

Brittle

Slightly sectile

1.2 Solubility

Not Available

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

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-2.982

1 7.18

1.5 Fracture

Conchoidal, Brittle, Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal

Uneven, Uneven, Gemstones (2009), Brittle

1.6 Cleavage

Rare tabular and prismatic crystals. Usually occurs as fibrous, parallel veins that break off into cleavage fragments.

Prismatic {10 1 0}, perfect

1.7 Mohs Hardness

3.52-2.5

2 10

1.8 Chemical Composition

CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

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

Anhydrite and Cinnabar Chemical Formula

While comparing Anhydrite 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 Anhydrite and Cinnabar chemical formula.

Chemical formula of Anhydrite- CaSO 4Michael 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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Anhydrite and Cinnabar Specific Gravity

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