Williamsite and Neptunite Physical Properties

Williamsite

Neptunite

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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

2.51-2.633.19-3.23

1 7.18

1.5 Fracture

Conchoidal, Conchoidal, Handbook of mineralogy (2001)

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

1.6 Cleavage

Not Available

{110} good

1.7 Mohs Hardness

45-6

2 10

1.8 Chemical Composition

(Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)

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

Williamsite and Neptunite Chemical Formula

While comparing Williamsite 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 Williamsite and Neptunite chemical formula.

Chemical formula of Williamsite- (Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Neptunite- KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)

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Williamsite and Neptunite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Williamsite and Neptunite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Williamsite and Neptunite Optical Properties during the identification of gemstone. Specific gravity of Williamsite is 3.19-3.23 whereas that of Neptunite is 3.19-3.23.