Iolite and Caledonite Physical Properties

Iolite

Caledonite

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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

2.6-2.75.6-5.76

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

3,1

[001] perfect; [100] distinct

1.7 Mohs Hardness

7-7.52.5-3

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

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

Iolite and Caledonite Chemical Formula

While comparing Iolite 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 Iolite and Caledonite chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Caledonite- Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)

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Iolite and Caledonite Specific Gravity

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