Caledonite and Purpurite Physical Properties

Caledonite

Purpurite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

5.6-5.763.2-3.4

1 7.18

1.5 Fracture

Uneven, UnevenAnthony et al, Handbook of mineralogy (2001)

Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

[001] perfect; [100] distinct

[100] [001] perfect

1.7 Mohs Hardness

2.5-34-4.5

2 10

1.8 Chemical Composition

Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)

MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references

Caledonite and Purpurite Chemical Formula

While comparing Caledonite and Purpurite 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 Caledonite and Purpurite chemical formula.

Chemical formula of Caledonite- Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references

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Caledonite and Purpurite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Caledonite and Purpurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Caledonite and Purpurite Optical Properties during the identification of gemstone. Specific gravity of Caledonite is 3.2-3.4 whereas that of Purpurite is 3.2-3.4.