Pyromorphite and Pollucite Physical Properties

Pyromorphite

Pollucite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

Readily soluble in HF

1.3 Durability

Not Available

1.4 Specific Gravity

6.5-7.12.86-2.94

1 7.18

1.5 Fracture

Uneven, ConchoidalArthur Thomas, Brittle, Metallic

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

1.6 Cleavage

Imperfect- [10 1 1]

None observed

1.7 Mohs Hardness

3.5-46.5-7

2 10

1.8 Chemical Composition

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

(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references

Pyromorphite and Pollucite Chemical Formula

While comparing Pyromorphite and Pollucite 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 Pollucite chemical formula.

Chemical formula of Pyromorphite- Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)
Chemical formula of Pollucite- (Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references

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Pyromorphite Vs Sapphire

Pyromorphite and Pollucite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyromorphite and Pollucite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyromorphite and Pollucite Optical Properties during the identification of gemstone. Specific gravity of Pyromorphite is 2.86-2.94 whereas that of Pollucite is 2.86-2.94.