Prehnite and Pollucite Physical Properties

Prehnite

Pollucite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

Readily soluble in HF

1.3 Durability

Not Available

1.4 Specific Gravity

2.80-2.952.86-2.94

1 7.18

1.5 Fracture

Uneven, Yellow, White, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Metallic

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

1.6 Cleavage

Distinct on [001]

None observed

1.7 Mohs Hardness

6-6.56.5-7

2 10

1.8 Chemical Composition

Ca₂Al₂Si₃O₁₂(OH)

(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references

Prehnite and Pollucite Chemical Formula

While comparing Prehnite and Pollucite 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 Prehnite and Pollucite chemical formula.

Chemical formula of Prehnite- Ca₂Al₂Si₃O₁₂(OH)
Chemical formula of Pollucite- (Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references

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Prehnite and Pollucite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Prehnite and Pollucite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Prehnite and Pollucite Optical Properties during the identification of gemstone. Specific gravity of Prehnite is 2.86-2.94 whereas that of Pollucite is 2.86-2.94.