Zoisite and Franklinite Physical Properties

Zoisite

Franklinite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

3.20-3.505.05-5.22

1 7.18

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Fracture

Uneven, Conchoidal, Even

Uneven

Cleavage

Perfect {010} imperfect {100}

None

Mohs Hardness

6-75.5-6

2 10

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Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

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

Zoisite and Franklinite Chemical Formula

While comparing Zoisite 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 Zoisite and Franklinite chemical formula.

Chemical formula of Zoisite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Franklinite- (Zn,Mn2+ ,Fe2+ )(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)

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Zoisite and Franklinite Specific Gravity

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