Fourmarierite
A variety of Minerals
What is Fourmarierite?
Fourmarierite is a secondary uranium-lead mineral. It was named for the Belgian geologist Paul Fourmarier (1877–1970). Its chemical formula is Pb(UO2)4O3(OH)4•4H2O.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Fourmarierite 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.
Quick Facts
Physical Properties
- Color
- Red, golden-red, brown
- Hardness (Mohs)
- 3 - 4
- Rock tumbling
- Not recommended
- Density
- 6.046 g/cm³
Chemical Properties
- Chemical Formula
- Pb(UO2)4O3(OH)4 · 4H2O
- Elements
- H, O, Pb, U
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Fourmarierite FAQs
How do I identify Fourmarierite?
Fourmarierite can be identified by its hardness of 3 - 4 on the Mohs scale, Red color. Look for these key characteristics when examining specimens.
What color is Fourmarierite?
Fourmarierite typically appears in Red, golden-red, brown. Color can vary depending on impurities and formation conditions.
How hard is Fourmarierite?
Fourmarierite has a hardness of 3 - 4 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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