Pyromorphite and Periclase Physical Properties

Pyromorphite

Periclase

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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

6.5-7.13.7-3.9

1 7.18

1.5 Fracture

Uneven, ConchoidalArthur Thomas, Brittle, Metallic

Conchoidal, Brittle

1.6 Cleavage

Imperfect- [10 1 1]

{001} perfect; {111} imperfect, may exhibit parting on , {011}

1.7 Mohs Hardness

3.5-45.5-6

2 10

1.8 Chemical Composition

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

MgOMichael OâDonoghue , Gems, Sixth Edition (2006)

Pyromorphite and Periclase Chemical Formula

While comparing Pyromorphite and Periclase 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 Periclase chemical formula.

Chemical formula of Pyromorphite- Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)
Chemical formula of Periclase- MgOMichael OâDonoghue , Gems, Sixth Edition (2006)

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Pyromorphite Vs Sapphirine

Pyromorphite Vs Rutilated Quartz

Pyromorphite and Periclase Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyromorphite and Periclase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyromorphite and Periclase Optical Properties during the identification of gemstone. Specific gravity of Pyromorphite is 3.7-3.9 whereas that of Periclase is 3.7-3.9.