Thulite and Prehnite Physical Properties

Thulite

Prehnite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

3.12.80-2.95

1 7.18

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Fracture

Uneven, Conchoidal

Uneven

Cleavage

Perfect {010} imperfect {100}

Distinct on [001]

Mohs Hardness

6-76-6.5

2 10

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Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

Ca₂Al₂Si₃O₁₂(OH)

Thulite and Prehnite Chemical Formula

While comparing Thulite and Prehnite 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 Thulite and Prehnite chemical formula.

Chemical formula of Thulite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Prehnite- Ca₂Al₂Si₃O₁₂(OH)

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Thulite and Prehnite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Thulite and Prehnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Thulite and Prehnite Optical Properties during the identification of gemstone. Specific gravity of Thulite is 2.80-2.95 whereas that of Prehnite is 2.80-2.95.