Derriksite
A variety of Minerals
What is Derriksite?
Derriksite is a very rare uranium mineral with the chemical formula Cu4(UO2)(SeO3)2(OH)6•H2O. It is a secondary mineral that contains copper, uranium and the rarer selenium. It is a bright green to duller bottle green colour. Its crystal habit is acicular, it is most likely to be found along with the uranyl selenium mineral demesmaekerite, but derriksite is much rarer than demesmaekerite. It is named after Jean Marie Francois Joseph Derriks (1912–1992), geologist and administrator of the Union Minière du Haut Katanga (UMHK). It has a Mohs hardness of about 2.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Derriksite 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.
Derriksite Localities Map
See where Derriksite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- clear green
- Density
- 4.61 g/cm³
Chemical Properties
- Chemical Formula
- Cu4(UO2)(SeO3)2(OH)6 Formula originally assumed to contain 1 water molecule.
- Elements
- Cu, H, O, Se, U
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Derriksite FAQs
How do I identify Derriksite?
Derriksite can be identified by its clear green color. Look for these key characteristics when examining specimens.
What color is Derriksite?
Derriksite typically appears in clear green. Color can vary depending on impurities and formation conditions.
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