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Poudretteite

A species of Minerals

Poudretteite is an extremely rare mineral and gemstone that was first discovered as minute crystals in Mont St. Hilaire, Quebec, Canada, during the 1960s. The mineral was named for the Poudrette family because they operated a quarry in the Mont St. Hilaire area where poudretteite was originally found, and the quarry is currently owned by the United Kingdom based Salmon Mining Industries Inc. Has a barely detectable radioactivity.

Hardness:

General Info About Poudretteite

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Physical Properties of Poudretteite

Colors

Colourless, very pale pink

Streak

White

Hardness

5 , Soft

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Chemical Properties of Poudretteite

Formula

KNa₂B₃Si₁₂O₃₀

Elements listed

B, K, Na, O, Si

Optical Properties of Poudretteite

Refractive Index

1.511-1.532

Birefringence

0.021

Pleochroism

Strong: purple-pink/colourless to brownish

Optical Character

Uniaxial positive

Characteristics of Poudretteite

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