Pyromorphite and Fluorite Physical Properties

Pyromorphite

Fluorite

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Physical Properties

Tenacity

Brittle

Solubility

slightly water soluble and in hot hydrochloric acid

Durability

Specific Gravity

6.5-7.13.00-3.25

1 7.18

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Fracture

Uneven, Conchoidal

Subconchoidal, Uneven, ConchoidalWalter Schumann

Cleavage

Imperfect- [10 1 1]

Octahedral, perfect on {111}, parting on {011}

Mohs Hardness

3.5-44

2 10

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Chemical Composition

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

CaF₂

Pyromorphite and Fluorite Chemical Formula

While comparing Pyromorphite and Fluorite 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 Fluorite chemical formula.

Chemical formula of Pyromorphite- Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)
Chemical formula of Fluorite- CaF₂

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Pyromorphite and Fluorite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyromorphite and Fluorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyromorphite and Fluorite Optical Properties during the identification of gemstone. Specific gravity of Pyromorphite is 3.00-3.25 whereas that of Fluorite is 3.00-3.25.