Carnelian and Pyromorphite Physical Properties

Carnelian

Pyromorphite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.58-2.64

6.5-7.1

1.5 Fracture

Uneven, Splintery, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)

Uneven, ConchoidalArthur Thomas, Brittle, Metallic

1.6 Cleavage

Absent

Imperfect- [10 1 1]

1.7 Mohs Hardness

6.5-7

3.5-4

1.8 Chemical Composition

SiO₂

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

Carnelian and Pyromorphite Chemical Formula

While comparing Carnelian and Pyromorphite 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 Carnelian and Pyromorphite chemical formula.

Chemical formula of Carnelian- SiO₂
Chemical formula of Pyromorphite- Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)

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Carnelian and Pyromorphite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Carnelian and Pyromorphite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Carnelian and Pyromorphite Optical Properties during the identification of gemstone. Specific gravity of Carnelian is 6.5-7.1 whereas that of Pyromorphite is 6.5-7.1.