URANIUM AUTUNITE – Yellow Crystal from Cuneo, Italy – Extremely Rare

Rare Italian Autunite specimen originating from Montefallonio, Peveragno, in the Cuneo area of Piedmont, Italy. This classic uranium-bearing locality is known for its very limited occurrences, making each specimen highly significant for collectors and systematic mineralogy.

The crystals display sharp terminations and a well-developed growth habit, with a strong visual contrast against the matrix. The aesthetic balance of form and color enhances both display value and scientific interest.

Autunite is one of the most iconic uranium phosphate minerals, widely appreciated for its bright appearance and its relevance in uranium mineralogy. Italian occurrences are particularly sought after due to their rarity and restricted geographic distribution.

A highly representative specimen combining provenance, aesthetics, and mineralogical importance.

Autunite is a hydrated calcium uranyl phosphate mineral with the chemical formula Ca(UO₂)₂(PO₄)₂·10–12H₂O. It belongs to the phosphate class and to the Autunite group, a family of secondary uranium minerals formed in oxidizing conditions. This mineral forms in the supergene alteration zones of uranium deposits, where uranium is mobilized by oxygen-rich waters and recombines with phosphate and calcium. It typically develops thin tabular crystals with a platy habit due to its tetragonal crystal system. Its high water content makes Autunite structurally delicate and potentially unstable over time, as dehydration can alter its physical appearance. The uranium content is responsible for both its radioactive properties and its strong UV fluorescence.

• Chemical formula: Ca(UO₂)₂(PO₄)₂·10–12H₂O
• Mineral class: Phosphates
• Mineral group: Autunite group (uranyl phosphates)
• Crystal system: Tetragonal
• Formation: Secondary mineral from oxidation zones of uranium-bearing deposits
• Key elements: Calcium (Ca), Uranium (U), Phosphorus (P), Oxygen (O), Hydrogen (H)

Autunite is one of the most well-known fluorescent uranium minerals under UV light. It played an important role in early studies of radioactivity due to its uranium content. Because of its high hydration, it can gradually lose water and change appearance over time. Italian localities such as Montefallonio are considered rare and highly significant for uranium mineral collectors.

Autunite is not used in crystal healing or lithotherapy practices due to its uranium content and radioactive nature. It is considered strictly a scientific and collector mineral, appreciated for its fluorescence 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.