Pyromorphite and Bustamite Physical Properties

Pyromorphite

Bustamite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

Partly soluble in HCl.

1.3 Durability

Not Available

1.4 Specific Gravity

6.5-7.13.32-3.43

1 7.18

1.5 Fracture

Uneven, ConchoidalArthur Thomas, Brittle, Metallic

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

Imperfect- [10 1 1]

{100} perfect; {110} and {1 1 0} good; {010} poor

1.7 Mohs Hardness

3.5-45.5-6

2 10

1.8 Chemical Composition

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

(Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Pyromorphite and Bustamite Chemical Formula

While comparing Pyromorphite and Bustamite 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 Bustamite chemical formula.

Chemical formula of Pyromorphite- Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)
Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Pyromorphite and Bustamite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyromorphite and Bustamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyromorphite and Bustamite Optical Properties during the identification of gemstone. Specific gravity of Pyromorphite is 3.32-3.43 whereas that of Bustamite is 3.32-3.43.