URANIUM CUPROSKLODOWSKITE – Uranium Silicate Crystal from Congo – Rare Mineral

Natural Cuprosklodowskite specimen from the uranium-rich deposit of Musonoi in Kolwezi, Lualaba, Democratic Republic of Congo. The specimen shows radiating aggregates of vivid green crystals developed on matrix, with well-defined crystal habits and excellent visual balance.

The mineral exhibits a characteristic green coloration typical of hydrated uranium silicates, forming delicate crystal sprays that enhance its aesthetic and scientific value. Specimens from this locality are considered rare and highly sought after in systematic mineral collections.

Cuprosklodowskite is a secondary uranium silicate formed in oxidizing zones of uranium deposits through alteration processes involving uranium-bearing minerals and silica-rich fluids.

Cuprosklodowskite is a hydrated copper uranyl silicate mineral with the chemical formula Cu(UO₂)₂(SiO₃OH)₂·6H₂O. It belongs to the silicate class and forms as a secondary uranium mineral in oxidizing environments of uranium deposits.

• Chemical formula: Cu(UO₂)₂(SiO₃OH)₂·6H₂O
• Mineral class: Silicates
• Crystal system: Monoclinic
• Formation: Secondary uranium silicate formed by alteration of uranium-bearing minerals in silica-rich oxidizing environments
• Key elements: Copper (Cu), Uranium (U), Silicon (Si), Oxygen (O), Hydrogen (H)

Cuprosklodowskite is part of a rare group of uranium silicate minerals known for their bright green coloration and delicate crystal sprays. It forms under very specific geological conditions where uranium-rich fluids interact with silica-bearing rocks. Specimens from the Katanga region are particularly valued due to their quality and scarcity.

Cuprosklodowskite is not used in crystal healing practices due to its uranium content and radioactive nature. It is considered a strictly scientific and collector mineral, valued for its rarity, structure, and geological significance.

Radioactivity & Safety: Uranium and thorium-bearing mineral specimens contain naturally occurring radioactive elements and should be handled responsibly. Avoid ingestion or inhalation of dust, and wash hands after handling. We recommend storing these specimens away from prolonged close contact and keeping them out of reach of children. These specimens are intended for mineralogical and collector use only, and are shipped in accordance with applicable regulations for natural radioactive minerals.

Photos: All photographs are taken under professional lighting conditions to accurately highlight crystal structure, color and detail. However, slight variations in tone and appearance may occur depending on screen calibration and ambient lighting conditions.

Shipping: is handled through selected reliable express couriers, with fast delivery (often 1–2 business days within Europe), full tracking, insurance coverage and professional protective packaging, as confirmed by customer feedback and reviews.

Multiple purchases can be consolidated into a single shipment, including items from different auctions or separate orders, by simply contacting us to arrange combined shipping. For high-value specimens, direct delivery by appointment is also available, either at home or at major European mineral shows and fairs.