Franklinite and Iolite Physical Properties

Franklinite

Iolite

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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

5.05-5.222.6-2.7

1 7.18

1.5 Fracture

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

Not Available

1.6 Cleavage

None

3,1

1.7 Mohs Hardness

5.5-67-7.5

2 10

1.8 Chemical Composition

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

Mg₂Al₄Si₅O₁₈

Franklinite and Iolite Chemical Formula

While comparing Franklinite and Iolite 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 Franklinite and Iolite chemical formula.

Chemical formula of Franklinite- (Zn,Mn2+ ,Fe2+ )(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈

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Franklinite and Iolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Franklinite and Iolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Franklinite and Iolite Optical Properties during the identification of gemstone. Specific gravity of Franklinite is 2.6-2.7 whereas that of Iolite is 2.6-2.7.