Petalite and Fluorite Physical Properties

Petalite

Fluorite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

insoluble

slightly water soluble and in hot hydrochloric acid

1.3 Durability

Not Available

1.4 Specific Gravity

2.403.00-3.25

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

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

Octahedral, perfect on {111}, parting on {011}

1.7 Mohs Hardness

6-6.54

2 10

1.8 Chemical Composition

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

CaF₂

Petalite and Fluorite Chemical Formula

While comparing Petalite and Fluorite 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 Fluorite chemical formula.

Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Fluorite- CaF₂

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Petalite and Fluorite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Petalite and Fluorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Petalite and Fluorite Optical Properties during the identification of gemstone. Specific gravity of Petalite is 3.00-3.25 whereas that of Fluorite is 3.00-3.25.