Apatite and Realgar Physical Properties

Apatite

Realgar

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.16-3.23

3.56

1.5 Fracture

Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal to uneven

(e.g. graphite).

1.6 Cleavage

[0001] indistinct, [1010] indistinct

{010} Good

1.7 Mohs Hardness

Not Available

1.8 Chemical Composition

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

AsSMichael OâDonoghue , Gems, Sixth Edition (2006)

Apatite and Realgar Chemical Formula

While comparing Apatite and Realgar 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 Apatite and Realgar chemical formula.

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

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Apatite and Realgar Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Realgar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Realgar Optical Properties during the identification of gemstone. Specific gravity of Apatite is 3.56 whereas that of Realgar is 3.56.