Iolite and Tanzanite Physical Properties

Iolite

Tanzanite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

Hard

1.4 Specific Gravity

2.6-2.73.35

1 7.18

1.5 Fracture

Not Available

Uneven, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

3,1

Perfect {010}, imperfect {100}

1.7 Mohs Hardness

7-7.56.5-7

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

Ca₂Al₃(SiO₄)₃(OH)

Iolite and Tanzanite Chemical Formula

While comparing Iolite and Tanzanite 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 Tanzanite chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Tanzanite- Ca₂Al₃(SiO₄)₃(OH)

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Iolite and Tanzanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Tanzanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Tanzanite Optical Properties during the identification of gemstone. Specific gravity of Iolite is 3.35 whereas that of Tanzanite is 3.35.