Chalcedony and Iolite Physical Properties

Chalcedony

Iolite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.55-2.702.6-2.7

1 7.18

1.5 Fracture

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

Not Available

1.6 Cleavage

Absent

3,1

1.7 Mohs Hardness

6.5-77-7.5

2 10

1.8 Chemical Composition

SiO₂

Mg₂Al₄Si₅O₁₈

Chalcedony and Iolite Chemical Formula

While comparing Chalcedony and Iolite 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 Chalcedony and Iolite chemical formula.

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

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Chalcedony and Iolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Chalcedony and Iolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Chalcedony and Iolite Optical Properties during the identification of gemstone. Specific gravity of Chalcedony is 2.6-2.7 whereas that of Iolite is 2.6-2.7.