Zoisite and Lawsonite Physical Properties

Zoisite

Lawsonite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

3.20-3.503.09

1 7.18

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Fracture

Uneven, Conchoidal, Even

Uneven

Cleavage

Perfect {010} imperfect {100}

Perfect on {100} and {010}, imperfect on {101}

Mohs Hardness

6-78

2 10

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Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

CaAl2Si2O7(OH)2.H2O

Zoisite and Lawsonite Chemical Formula

While comparing Zoisite and Lawsonite 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 Lawsonite chemical formula.

Chemical formula of Zoisite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Lawsonite- CaAl2Si2O7(OH)2.H2O

Compare Brown Gemstones

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Zoisite and Lawsonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Zoisite and Lawsonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Zoisite and Lawsonite Optical Properties during the identification of gemstone. Specific gravity of Zoisite is 3.09 whereas that of Lawsonite is 3.09.