Hollandite and Iolite Physical Properties

Hollandite

Iolite

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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

5.052.6-2.7

1 7.18

1.5 Fracture

Brittle, Metallic

Not Available

1.6 Cleavage

Distinct / Good, Prismatic

3,1

1.7 Mohs Hardness

4-67-7.5

2 10

1.8 Chemical Composition

Ba(Mn++++,Mn++)8O16

Mg₂Al₄Si₅O₁₈

Hollandite and Iolite Chemical Formula

While comparing Hollandite and Iolite 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 Hollandite and Iolite chemical formula.

Chemical formula of Hollandite- Ba(Mn++++,Mn++)8O16
Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈

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Hollandite and Iolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hollandite and Iolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hollandite and Iolite Optical Properties during the identification of gemstone. Specific gravity of Hollandite is 2.6-2.7 whereas that of Iolite is 2.6-2.7.