Prehnite and Neptunite Physical Properties

Prehnite

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

2.80-2.953.19-3.23

1 7.18

1.5 Fracture

Uneven, Yellow, White, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Metallic

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

1.6 Cleavage

Distinct on [001]

{110} good

1.7 Mohs Hardness

6-6.55-6

2 10

1.8 Chemical Composition

Ca₂Al₂Si₃O₁₂(OH)

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

Prehnite and Neptunite Chemical Formula

While comparing Prehnite 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 Prehnite and Neptunite chemical formula.

Chemical formula of Prehnite- Ca₂Al₂Si₃O₁₂(OH)
Chemical formula of Neptunite- KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)

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Prehnite and Neptunite Specific Gravity

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