Andalusite and Neptunite Physical Properties

Andalusite

Neptunite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

3.05-3.21

Uneven, Subconchoidal, Splintery

Good on {110}, poor on {100}

7.5

Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

Brittle

3.19-3.23

Conchoidal

{110} good

5-6

KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)

Andalusite and Neptunite Chemical Formula

While comparing Andalusite and Neptunite 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 Andalusite and Neptunite chemical formula.

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Andalusite and Neptunite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Andalusite and Neptunite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andalusite Vs Neptunite during the identification of gemstone. Specific gravity of Andalusite is whereas that of Neptunite is .