Cinnabar and Apatite Physical Properties

Cinnabar

Apatite

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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

23.16-3.23

1 7.18

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Fracture

Uneven

Conchoidal, Uneven, Conchoidal to uneven

Cleavage

Prismatic {10 1 0}, perfect

[0001] indistinct, [1010] indistinct

Mohs Hardness

2-2.55

2 10

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Chemical Composition

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

Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references

Cinnabar and Apatite Chemical Formula

While comparing Cinnabar and Apatite 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 Cinnabar and Apatite chemical formula.

Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Apatite- Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references

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Cinnabar and Apatite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cinnabar and Apatite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cinnabar and Apatite Optical Properties during the identification of gemstone. Specific gravity of Cinnabar is 3.16-3.23 whereas that of Apatite is 3.16-3.23.