Pyromorphite and Anhydrite Physical Properties

Pyromorphite

Anhydrite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

6.5-7.12.90-2.98

1 7.18

1.5 Fracture

Uneven, ConchoidalArthur Thomas, Brittle, Metallic

Conchoidal, Brittle, Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal

1.6 Cleavage

Imperfect- [10 1 1]

Rare tabular and prismatic crystals. Usually occurs as fibrous, parallel veins that break off into cleavage fragments.

1.7 Mohs Hardness

3.5-43.5

2 10

1.8 Chemical Composition

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

CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

Pyromorphite and Anhydrite Chemical Formula

While comparing Pyromorphite and Anhydrite 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 Anhydrite chemical formula.

Chemical formula of Pyromorphite- Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)
Chemical formula of Anhydrite- CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

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Pyromorphite Vs Sapphire

Pyromorphite and Anhydrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyromorphite and Anhydrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyromorphite and Anhydrite Optical Properties during the identification of gemstone. Specific gravity of Pyromorphite is 2.90-2.98 whereas that of Anhydrite is 2.90-2.98.