Hercynite and Franklinite Physical Properties

Hercynite

Franklinite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.395.05-5.22

1 7.18

1.5 Fracture

ConchoidalGemdat.org, Uneven

Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001)

1.6 Cleavage

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

None

1.7 Mohs Hardness

7.5-85.5-6

2 10

1.8 Chemical Composition

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

(Zn,Mn2+ ,Fe2+ )(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)

Hercynite and Franklinite Chemical Formula

While comparing Hercynite and Franklinite 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 Franklinite chemical formula.

Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
Chemical formula of Franklinite- (Zn,Mn2+ ,Fe2+ )(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)

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Hercynite and Franklinite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hercynite and Franklinite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hercynite and Franklinite Optical Properties during the identification of gemstone. Specific gravity of Hercynite is 5.05-5.22 whereas that of Franklinite is 5.05-5.22.