Caledonite and Poudretteite Physical Properties

Caledonite

Poudretteite

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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

5.6-5.762.51-2.53

1 7.18

1.5 Fracture

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

Conchoidal, Splintery

1.6 Cleavage

[001] perfect; [100] distinct

None

1.7 Mohs Hardness

2.5-35

2 10

1.8 Chemical Composition

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

KNa 2B 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006)

Caledonite and Poudretteite Chemical Formula

While comparing Caledonite and Poudretteite 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 Poudretteite 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 Poudretteite- KNa 2B 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Blue Gemstones

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Caledonite and Poudretteite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Caledonite and Poudretteite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Caledonite and Poudretteite Optical Properties during the identification of gemstone. Specific gravity of Caledonite is 2.51-2.53 whereas that of Poudretteite is 2.51-2.53.