Zoisite and Riebeckite Physical Properties

Zoisite

Riebeckite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

3.20-3.503.28-3.44

1 7.18

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Fracture

Uneven, Conchoidal, Even

Uneven, Splintery

Cleavage

Perfect {010} imperfect {100}

Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}

Mohs Hardness

6-75.0-6.0

2 10

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Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

Na2Fe2+3Fe3+2Si8O22(OH)2

Zoisite and Riebeckite Chemical Formula

While comparing Zoisite and Riebeckite 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 Riebeckite chemical formula.

Chemical formula of Zoisite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Riebeckite- Na2Fe2+3Fe3+2Si8O22(OH)2

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Zoisite and Riebeckite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Zoisite and Riebeckite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Zoisite and Riebeckite Optical Properties during the identification of gemstone. Specific gravity of Zoisite is 3.28-3.44 whereas that of Riebeckite is 3.28-3.44.