Petalite and Diaspore Physical Properties

Petalite

Diaspore

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1 Physical Properties

1.1 Tenacity

Brittle

Very brittle

1.2 Solubility

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.403.30-3.40

1 7.18

1.5 Fracture

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

Conchoidal, Brittle, Conchoidal

1.6 Cleavage

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

{010} perfect, {110} distinct, {100} in traces

1.7 Mohs Hardness

6-6.56.5-7

2 10

1.8 Chemical Composition

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

AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references

Petalite and Diaspore Chemical Formula

While comparing Petalite and Diaspore 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 Diaspore chemical formula.

Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Diaspore- AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references

Compare Gems Found In Australia

Petalite Vs Scolecite

Petalite Vs Sapphire

Petalite Vs Scheelite

Petalite and Diaspore Specific Gravity

Another important criteria for qualitative analysis of gemstones is Petalite and Diaspore Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Petalite and Diaspore Optical Properties during the identification of gemstone. Specific gravity of Petalite is 3.30-3.40 whereas that of Diaspore is 3.30-3.40.