Iolite and Chalcedony Physical Properties

Iolite

Chalcedony

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.72.55-2.70

1 7.18

1.5 Fracture

Not Available

Uneven, Splintery, Conchoidal, Uneven, Splintery, Conchoidal, UnevenWalter Schumann

1.6 Cleavage

3,1

Absent

1.7 Mohs Hardness

7-7.56.5-7

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

SiO₂

Iolite and Chalcedony Chemical Formula

While comparing Iolite and Chalcedony 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 Chalcedony chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Chalcedony- SiO₂

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Iolite and Chalcedony Specific Gravity

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