URANIUM AUTUNITE – Radioactive Green Crystals from France – Rare Specimen

Rare natural Autunite specimen from La Faye, Grury, in the Burgundy-Franche-Comté region of France. The specimen shows well-developed green tabular crystals with sharp and well-defined crystal faces, allowing a clear appreciation of its natural crystal habit.

The specimen belongs to the uranium phosphate mineral group and is appreciated for its aesthetic crystal development and strong visual impact. French occurrences of autunite are well known among systematic mineral collectors for their quality and crystallization style.

Autunite forms as a secondary uranium mineral in oxidizing environments through alteration of uranium-bearing primary minerals.

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 forms as a secondary mineral in uranium-rich oxidizing environments.

• Chemical formula: Ca(UO₂)₂(PO₄)₂·10–12H₂O
• Mineral class: Phosphates
• Crystal system: Tetragonal
• Formation: Secondary uranium mineral formed by alteration of uranium-bearing primary minerals in oxidizing conditions
• Key elements: Calcium (Ca), Uranium (U), Phosphorus (P), Oxygen (O), Hydrogen (H)

Autunite is one of the most recognizable uranium minerals due to its green to yellow-green coloration and tabular crystal habit. It forms in uranium-rich geological environments where oxidation transforms primary uranium minerals into secondary phosphates. French localities such as Burgundy are appreciated for their well-crystallized specimens.

Autunite is not used in crystal healing practices due to its uranium content and radioactive nature. It is considered strictly a scientific and collector mineral, valued for its crystallography and aesthetic properties.

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.