Achroite and Neptunite Physical Properties

Achroite

Neptunite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

2.90-3.40

Uneven, ConchoidalWalter Schumann

Indiscernible

7-7.5

Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.

Brittle

3.19-3.23

Conchoidal

{110} good

5-6

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

Achroite and Neptunite Chemical Formula

While comparing Achroite 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 Achroite and Neptunite chemical formula.

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Achroite and Neptunite Specific Gravity

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