Zoisite and Diaspore Physical Properties

Zoisite

Diaspore

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Physical Properties

Tenacity

Very brittle

Solubility

insoluble

Durability

Specific Gravity

3.20-3.503.30-3.40

1 7.18

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Fracture

Uneven, Conchoidal, Even

Conchoidal

Cleavage

Perfect {010} imperfect {100}

{010} perfect, {110} distinct, {100} in traces

Mohs Hardness

6-76.5-7

2 10

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Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references

Zoisite and Diaspore Chemical Formula

While comparing Zoisite and Diaspore 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 Diaspore chemical formula.

Chemical formula of Zoisite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Diaspore- AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references

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Zoisite and Diaspore Specific Gravity

Another important criteria for qualitative analysis of gemstones is Zoisite and Diaspore Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Zoisite and Diaspore Optical Properties during the identification of gemstone. Specific gravity of Zoisite is 3.30-3.40 whereas that of Diaspore is 3.30-3.40.