Zoisite and Apophyllite Physical Properties

Zoisite

Apophyllite

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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

2.30-2.50

1.5 Fracture

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

Uneven, UnevenArthur Thomas, Gemstones (2009)

1.6 Cleavage

Perfect {010} imperfect {100}

Perfect on (001)

1.7 Mohs Hardness

6-7

4.5-5

1.8 Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.

Zoisite and Apophyllite Chemical Formula

While comparing Zoisite and Apophyllite 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 Apophyllite chemical formula.

Chemical formula of Zoisite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Apophyllite- KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.

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Zoisite and Apophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Zoisite and Apophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Zoisite and Apophyllite Optical Properties during the identification of gemstone. Specific gravity of Zoisite is 2.30-2.50 whereas that of Apophyllite is 2.30-2.50.