Hercynite and Fluorite Physical Properties

Hercynite

Fluorite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

slightly water soluble and in hot hydrochloric acid

1.3 Durability

Not Available

1.4 Specific Gravity

4.393.00-3.25

1 7.18

1.5 Fracture

ConchoidalGemdat.org, Uneven

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

1.6 Cleavage

{111} Indistinct, {111} Indistinct, {111} Indistinct

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

1.7 Mohs Hardness

7.5-84

2 10

1.8 Chemical Composition

Fe2+ Al 2O 4Gemdat.org , Management Team (2012)

CaF₂

Hercynite and Fluorite Chemical Formula

While comparing Hercynite 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 Hercynite and Fluorite chemical formula.

Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
Chemical formula of Fluorite- CaF₂

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Hercynite and Fluorite Specific Gravity

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