Petalite and Neptunite Physical Properties

Petalite

Neptunite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

insoluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.403.19-3.23

1 7.18

1.5 Fracture

Subconchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal

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

1.6 Cleavage

Perfect on {001}, poor on {201} with 38.5° angle between the two

{110} good

1.7 Mohs Hardness

6-6.55-6

2 10

1.8 Chemical Composition

LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Petalite and Neptunite Chemical Formula

While comparing Petalite 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 Petalite and Neptunite chemical formula.

Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Neptunite- KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Gems Found In Australia

Petalite Vs Sapphire

Petalite Vs Scheelite

Petalite Vs Scolecite

Petalite and Neptunite Specific Gravity

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