Zoisite and Dumortierite Physical Properties

Zoisite

Dumortierite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

3.20-3.503.26-3.41

1 7.18

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Fracture

Uneven, Conchoidal, Even

Fibrous, ConchoidalWalter Schumann

Cleavage

Perfect {010} imperfect {100}

Distinct on {100}, poor on {110}; parting on {001}

Mohs Hardness

6-77-8.5

2 10

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Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

AlAl₆O₃BSi₃O₁₈

Zoisite and Dumortierite Chemical Formula

While comparing Zoisite and Dumortierite 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 Dumortierite chemical formula.

Chemical formula of Zoisite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Dumortierite- AlAl₆O₃BSi₃O₁₈

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Zoisite and Dumortierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Zoisite and Dumortierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Zoisite and Dumortierite Optical Properties during the identification of gemstone. Specific gravity of Zoisite is 3.26-3.41 whereas that of Dumortierite is 3.26-3.41.