Poudretteite
A variety of Minerals
What is Poudretteite?
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.
Optical Properties
- Refractive Index
- 1.511-1.532
- Birefringence
- 0.021
- Pleochroism
- Strong: purple-pink/colourless to brownish
- Optical Character
- Uniaxial positive
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Poudretteite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Poudretteite Localities Map
See where Poudretteite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Colourless, very pale pink
- Hardness (Mohs)
- 5
- Streak
- White
Chemical Properties
- Chemical Formula
- KNa2B3Si12O30
- Elements
- B, K, Na, O, Si
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Poudretteite FAQs
How do I identify Poudretteite?
Poudretteite can be identified by its hardness of 5 on the Mohs scale, Colourless color. Look for these key characteristics when examining specimens.
What color is Poudretteite?
Poudretteite typically appears in Colourless, very pale pink. Color can vary depending on impurities and formation conditions.
How hard is Poudretteite?
Poudretteite has a hardness of 5 on the Mohs scale. This gives it moderate hardness.
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