Hercynite and Caledonite Physical Properties

Hercynite

Caledonite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

4.395.6-5.76

1 7.18

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Fracture

Uneven

Cleavage

{111} Indistinct, {111} Indistinct, {111} Indistinct

[001] perfect; [100] distinct

Mohs Hardness

7.5-82.5-3

2 10

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Chemical Composition

Fe2+ Al 2O 4Gemdat.org , Management Team (2012)

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

Hercynite and Caledonite Chemical Formula

While comparing Hercynite and Caledonite 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 Hercynite and Caledonite chemical formula.

Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
Chemical formula of Caledonite- Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)

Compare Yellow Gemstones

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Hercynite Vs Marcasite

Hercynite Vs Mohawkite

Hercynite and Caledonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hercynite and Caledonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hercynite and Caledonite Optical Properties during the identification of gemstone. Specific gravity of Hercynite is 5.6-5.76 whereas that of Caledonite is 5.6-5.76.