Iolite and Pectolite Physical Properties

Iolite

Pectolite

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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

2.6-2.72.74-2.90

1 7.18

1.5 Fracture

Not Available

Uneven, Gemstones (2009), Splintery

1.6 Cleavage

3,1

Perfect on {100} and {001}

1.7 Mohs Hardness

7-7.54.5-5

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

Ca 2NaHSi 3O 9Ulrich Henn and Claudio C.

Iolite and Pectolite Chemical Formula

While comparing Iolite and Pectolite 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 Pectolite chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Pectolite- Ca 2NaHSi 3O 9Ulrich Henn and Claudio C.

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Iolite and Pectolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Pectolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Pectolite Optical Properties during the identification of gemstone. Specific gravity of Iolite is 2.74-2.90 whereas that of Pectolite is 2.74-2.90.