Tanzanite and Neptunite Physical Properties

Tanzanite

Neptunite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Hard

Not Available

1.4 Specific Gravity

3.353.19-3.23

1 7.18

1.5 Fracture

Uneven, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)

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

1.6 Cleavage

Perfect {010}, imperfect {100}

{110} good

1.7 Mohs Hardness

6.5-75-6

2 10

1.8 Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

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

Tanzanite and Neptunite Chemical Formula

While comparing Tanzanite 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 Tanzanite and Neptunite chemical formula.

Chemical formula of Tanzanite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Neptunite- KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)

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Tanzanite and Neptunite Specific Gravity

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