Caledonite and Onyx Physical Properties

Caledonite

Onyx

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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

5.6-5.762.55-2.70

1 7.18

1.5 Fracture

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

Not Available

1.6 Cleavage

[001] perfect; [100] distinct

Indiscernible

1.7 Mohs Hardness

2.5-36.5-7

2 10

1.8 Chemical Composition

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

SiO₂

Caledonite and Onyx Chemical Formula

While comparing Caledonite and Onyx 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 Onyx 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 Onyx- SiO₂

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Caledonite and Onyx Specific Gravity

Another important criteria for qualitative analysis of gemstones is Caledonite and Onyx Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Caledonite and Onyx Optical Properties during the identification of gemstone. Specific gravity of Caledonite is 2.55-2.70 whereas that of Onyx is 2.55-2.70.