Ruby and Neptunite Physical Properties

Ruby

Neptunite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.97-4.053.19-3.23

1 7.18

1.5 Fracture

Conchoidal

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

1.6 Cleavage

No true cleavage

{110} good

1.7 Mohs Hardness

95-6

2 10

1.8 Chemical Composition

Al ₂ O ₃

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

Ruby and Neptunite Chemical Formula

While comparing Ruby 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 Ruby and Neptunite chemical formula.

Chemical formula of Ruby- Al ₂ O ₃
Chemical formula of Neptunite- KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)

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Ruby and Neptunite Specific Gravity

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