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Pyromorphite
Pyromorphite

Goethite
Goethite



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Pyromorphite
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Goethite

Pyromorphite and Goethite Physical Properties

Physical Properties

Tenacity

Brittle
-

Solubility

-
HCl soluble

Durability

-
-

Specific Gravity

6.5-7.14.27-4.29
1 7.18
👆🏻

Fracture

Uneven, Conchoidal
Uneven

Cleavage

Imperfect- [10 1 1]
Perfect {010}

Mohs Hardness

3.5-45-5.5
2 10
👆🏻

Chemical Composition

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

Pyromorphite and Goethite Chemical Formula

While comparing Pyromorphite and Goethite 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 Goethite chemical formula.

  • Chemical formula of Pyromorphite- Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)
  • Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)

Pyromorphite and Goethite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyromorphite and Goethite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyromorphite and Goethite Optical Properties during the identification of gemstone. Specific gravity of Pyromorphite is 4.27-4.29 whereas that of Goethite is 4.27-4.29.