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Prehnite

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Prehnite

Chemical Composition : Ca2Al2Si3O10(OH)2 Calcium Aluminum Silicate Hydroxide

Hardness : 6.0 – 6.5

Specific Gravity (Density) : 2.80 – 2.95 (g/cm3)

Refractive Index : 1.611 – 1.665 Biaxial ( + )

Prehnite is a beautiful gem with a pearly to velvety look that glows with color in well faceted gems. Most facetable material is found in Australia and Mali. The richest, most saturated colors come from Australia. Colors range from bright yellow (Australia), yellowish green, pale green (Mali) and colorless.

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