Neptunite and Sylvite Physical Properties

Neptunite

Sylvite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.19-3.231.993

1 7.18

1.5 Fracture

Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle

Uneven, Brittle

1.6 Cleavage

{110} good

Perfect on [100], [010], [001]

1.7 Mohs Hardness

5-62.5

2 10

1.8 Chemical Composition

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

Not Available

Neptunite and Sylvite Chemical Formula

While comparing Neptunite and Sylvite 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 Neptunite and Sylvite chemical formula.

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

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Neptunite and Sylvite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Neptunite and Sylvite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Neptunite and Sylvite Optical Properties during the identification of gemstone. Specific gravity of Neptunite is 1.993 whereas that of Sylvite is 1.993.