Apatite and Pyromorphite Physical Properties

Apatite

Pyromorphite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.16-3.236.5-7.1

1 7.18

1.5 Fracture

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

Uneven, ConchoidalArthur Thomas, Brittle, Metallic

1.6 Cleavage

[0001] indistinct, [1010] indistinct

Imperfect- [10 1 1]

1.7 Mohs Hardness

53.5-4

2 10

1.8 Chemical Composition

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

Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)

Apatite and Pyromorphite Chemical Formula

While comparing Apatite and Pyromorphite 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 Pyromorphite 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 Pyromorphite- Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)

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Apatite and Pyromorphite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Pyromorphite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Pyromorphite Optical Properties during the identification of gemstone. Specific gravity of Apatite is 6.5-7.1 whereas that of Pyromorphite is 6.5-7.1.