Iolite and Prasiolite Physical Properties

Iolite

Prasiolite

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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

2.6-2.72.65

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

3,1

1.7 Mohs Hardness

7-7.57

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

SiO 2Ulrich Henn and Claudio C.

Iolite and Prasiolite Chemical Formula

While comparing Iolite and Prasiolite 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 Prasiolite chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Prasiolite- SiO 2Ulrich Henn and Claudio C.

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Iolite and Prasiolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Prasiolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Prasiolite Optical Properties during the identification of gemstone. Specific gravity of Iolite is 2.65 whereas that of Prasiolite is 2.65.