Zoisite and Chalcedony Physical Properties

Zoisite

Chalcedony

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.20-3.50

2.55-2.70

1.5 Fracture

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

Uneven, Splintery, Conchoidal, Uneven, Splintery, Conchoidal, UnevenWalter Schumann

1.6 Cleavage

Perfect {010} imperfect {100}

Absent

1.7 Mohs Hardness

6-7

6.5-7

1.8 Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

SiO₂

Zoisite and Chalcedony Chemical Formula

While comparing Zoisite and Chalcedony 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 Chalcedony chemical formula.

Chemical formula of Zoisite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Chalcedony- SiO₂

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Zoisite and Chalcedony Specific Gravity

Another important criteria for qualitative analysis of gemstones is Zoisite and Chalcedony Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Zoisite and Chalcedony Optical Properties during the identification of gemstone. Specific gravity of Zoisite is 2.55-2.70 whereas that of Chalcedony is 2.55-2.70.