Fluorite and Petalite Physical Properties

Fluorite

Petalite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

slightly water soluble and in hot hydrochloric acid

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.00-3.252.40

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

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

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

1.7 Mohs Hardness

46-6.5

2 10

1.8 Chemical Composition

CaF₂

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

Fluorite and Petalite Chemical Formula

While comparing Fluorite and Petalite 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 Fluorite and Petalite chemical formula.

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

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Fluorite and Petalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Fluorite and Petalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Fluorite and Petalite Optical Properties during the identification of gemstone. Specific gravity of Fluorite is 2.40 whereas that of Petalite is 2.40.