Zoisite and Williamsite Physical Properties

Zoisite

Williamsite

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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

2.51-2.63

1.5 Fracture

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

Conchoidal, Conchoidal, Handbook of mineralogy (2001)

1.6 Cleavage

Perfect {010} imperfect {100}

Not Available

1.7 Mohs Hardness

6-7

1.8 Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

(Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)

Zoisite and Williamsite Chemical Formula

While comparing Zoisite and Williamsite 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 Williamsite chemical formula.

Chemical formula of Zoisite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Williamsite- (Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)

Compare Brown Gemstones

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Zoisite Vs Sphene

Zoisite and Williamsite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Zoisite and Williamsite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Zoisite and Williamsite Optical Properties during the identification of gemstone. Specific gravity of Zoisite is 2.51-2.63 whereas that of Williamsite is 2.51-2.63.