Iolite and Spodumene Physical Properties

Iolite

Spodumene

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.7

3.15-3.21

1.5 Fracture

Not Available

Uneven, Subconchoidal, Gemstones (2009)

1.6 Cleavage

3,1

Perfect prismatic, two directions {110} ∧ {1 1 0} at 87°

1.7 Mohs Hardness

7-7.5

6-7

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

LiAlSi₂O₆

Iolite and Spodumene Chemical Formula

While comparing Iolite and Spodumene 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 Spodumene chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Spodumene- LiAlSi₂O₆

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Iolite and Spodumene Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Spodumene Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Spodumene Optical Properties during the identification of gemstone. Specific gravity of Iolite is 3.15-3.21 whereas that of Spodumene is 3.15-3.21.