Rock Crystal and Pyromorphite Physical Properties

Rock Crystal

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

2.656.5-7.1

1 7.18

1.5 Fracture

ConchoidalWalter Schumann, Gemstones of the world (2001), ConchoidalWalter Schumann, Gemstones of the world (2001)

Uneven, ConchoidalArthur Thomas, Brittle, Metallic

1.6 Cleavage

Not Available

Imperfect- [10 1 1]

1.7 Mohs Hardness

73.5-4

2 10

1.8 Chemical Composition

SiO 2Walter Schumann , Gemstones of the world (2001)

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

Rock Crystal and Pyromorphite Chemical Formula

While comparing Rock Crystal 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 Rock Crystal and Pyromorphite chemical formula.

Chemical formula of Rock Crystal- SiO 2Walter Schumann , Gemstones of the world (2001)
Chemical formula of Pyromorphite- Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)

Compare Blue Gemstones

Rock Crystal Vs Serendibite

Rock Crystal Vs Sardonyx

Rock Crystal Vs Scorzalite

Rock Crystal and Pyromorphite Specific Gravity

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