Iolite and Galena Physical Properties

Iolite

Galena

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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

2.6-2.7

6.23

1.5 Fracture

Not Available

Subconchoidal, Brittle, Metallic

1.6 Cleavage

3,1

Cubic perfect on [001], parting on [111]

1.7 Mohs Hardness

7-7.5

2.5-2.75

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

PbS

Iolite and Galena Chemical Formula

While comparing Iolite and Galena 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 Galena chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Galena- PbS

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Iolite and Galena Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Galena Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Galena Optical Properties during the identification of gemstone. Specific gravity of Iolite is 6.23 whereas that of Galena is 6.23.