Zoisite and Sunstone Physical Properties

Zoisite

Sunstone

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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

3.20-3.50

2.62-2.65

1.5 Fracture

Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Even

Gemstones of the world (2001)

1.6 Cleavage

Perfect {010} imperfect {100}

001

1.7 Mohs Hardness

6-7

1.8 Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

Microcline: KAlSi₃O₈ Oligoclase: (Na,Ca)Al_1-2Si_3-2O₈

Zoisite and Sunstone Chemical Formula

While comparing Zoisite and Sunstone 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 Sunstone chemical formula.

Chemical formula of Zoisite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Sunstone- Microcline: KAlSi₃O₈ Oligoclase: (Na,Ca)Al_1-2Si_3-2O₈

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Zoisite Vs Sunstone

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Zoisite and Sunstone Specific Gravity

Another important criteria for qualitative analysis of gemstones is Zoisite and Sunstone Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Zoisite and Sunstone Optical Properties during the identification of gemstone. Specific gravity of Zoisite is 2.62-2.65 whereas that of Sunstone is 2.62-2.65.