Pyromorphite and Apatite Physical Properties

Pyromorphite

Apatite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

6.5-7.13.16-3.23

1 7.18

1.5 Fracture

Uneven, ConchoidalArthur Thomas, Brittle, Metallic

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

1.6 Cleavage

Imperfect- [10 1 1]

[0001] indistinct, [1010] indistinct

1.7 Mohs Hardness

3.5-45

2 10

1.8 Chemical Composition

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

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

Pyromorphite and Apatite Chemical Formula

While comparing Pyromorphite 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 Pyromorphite and Apatite chemical formula.

Chemical formula of Pyromorphite- Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)
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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Pyromorphite and Apatite Specific Gravity

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