Iolite and Schorl Physical Properties

Iolite

Schorl

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.73.18-3.22

1 7.18

1.5 Fracture

Not Available

Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal

1.6 Cleavage

3,1

{1011} Indistinct

1.7 Mohs Hardness

7-7.5Not Available

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

Na(Fe2+3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

Iolite and Schorl Chemical Formula

While comparing Iolite and Schorl 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 Schorl chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Schorl- Na(Fe2+3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

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Iolite and Schorl Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Schorl Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Schorl Optical Properties during the identification of gemstone. Specific gravity of Iolite is 3.18-3.22 whereas that of Schorl is 3.18-3.22.