Emerald and Iolite Physical Properties

Emerald

Iolite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Hard

Not Available

1.4 Specific Gravity

2.67-2.78

2.6-2.7

1.5 Fracture

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)

Not Available

1.6 Cleavage

Imperfect on the [0001]

3,1

1.7 Mohs Hardness

7.5-8

7-7.5

1.8 Chemical Composition

Be₃Al₂SiO₆

Mg₂Al₄Si₅O₁₈

Emerald and Iolite Chemical Formula

While comparing Emerald 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 Emerald and Iolite chemical formula.

Chemical formula of Emerald- Be₃Al₂SiO₆
Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈

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Emerald and Iolite Specific Gravity

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