Realgar and Apatite Physical Properties

Realgar

Apatite

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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

3.563.16-3.23

1 7.18

1.5 Fracture

(e.g. graphite).

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

1.6 Cleavage

{010} Good

[0001] indistinct, [1010] indistinct

1.7 Mohs Hardness

Not Available5

2 10

1.8 Chemical Composition

AsSMichael OâDonoghue , Gems, Sixth Edition (2006)

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

Realgar and Apatite Chemical Formula

While comparing Realgar 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 Realgar and Apatite chemical formula.

Chemical formula of Realgar- AsSMichael OâDonoghue , Gems, Sixth Edition (2006)
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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Realgar and Apatite Specific Gravity

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