Cinnabar and Fluorapatite Physical Properties

Cinnabar

Fluorapatite

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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

23.1-3.25

1 7.18

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Fracture

Uneven

Cleavage

Prismatic {10 1 0}, perfect

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) 3FAnthony et al , Handbook of mineralogy (2001)

Cinnabar and Fluorapatite Chemical Formula

While comparing Cinnabar and Fluorapatite 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 Fluorapatite chemical formula.

Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Fluorapatite- Ca 5(PO 4) 3FAnthony et al , Handbook of mineralogy (2001)

Compare Red Gemstones

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Cinnabar Vs Friedelite

Cinnabar Vs Hexagonite

Cinnabar and Fluorapatite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cinnabar and Fluorapatite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cinnabar and Fluorapatite Optical Properties during the identification of gemstone. Specific gravity of Cinnabar is 3.1-3.25 whereas that of Fluorapatite is 3.1-3.25.