Zoisite and Crystal Opal Physical Properties

Zoisite

Crystal Opal

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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

3.20-3.501.97-2.22

1 7.18

1.5 Fracture

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

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

Perfect {010} imperfect {100}

Not Available

1.7 Mohs Hardness

6-75.5-6.5

2 10

1.8 Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

SiO 2 + H 2OUlrich Henn and Claudio C.

Zoisite and Crystal Opal Chemical Formula

While comparing Zoisite and Crystal Opal 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 Crystal Opal chemical formula.

Chemical formula of Zoisite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Crystal Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

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Zoisite and Crystal Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Zoisite and Crystal Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Zoisite and Crystal Opal Optical Properties during the identification of gemstone. Specific gravity of Zoisite is 1.97-2.22 whereas that of Crystal Opal is 1.97-2.22.