Pyromorphite and Brookite Physical Properties

Pyromorphite

Brookite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

6.5-7.13.87-4.14

1 7.18

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Fracture

Uneven, Conchoidal

Subconchoidal, Conchoidal

Cleavage

Imperfect- [10 1 1]

Poor on {120}, in traces on {001}

Mohs Hardness

3.5-45.5-6

2 10

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Chemical Composition

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

TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Pyromorphite and Brookite Chemical Formula

While comparing Pyromorphite and Brookite 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 Brookite chemical formula.

Chemical formula of Pyromorphite- Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)
Chemical formula of Brookite- TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Pyromorphite Vs Smithsonite

Pyromorphite Vs Sphalerite

Pyromorphite and Brookite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyromorphite and Brookite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyromorphite and Brookite Optical Properties during the identification of gemstone. Specific gravity of Pyromorphite is 3.87-4.14 whereas that of Brookite is 3.87-4.14.