Uranothorite — Macdonald Mine, Hybla, Ontario, Canada

Uranothorite. Macdonald Mine, Hybla, Hastings County, Ontario, Canada. Grenville Province.

Uranothorite from the Macdonald Mine at Hybla — a historically significant radioactive mineral locality in Ontario's Grenville Province and one of the well-documented thorium-uranium occurrences of the Bancroft-Haliburton district. The Macdonald Mine exploited a carbonatite-associated rare earth and radioactive mineral deposit, placing it in the same geological family as the broader cluster of Bancroft-area carbonatites that have made this region one of the premier destinations globally for collectors seeking uranium and thorium mineral species.

Uranothorite (ThSiO₄ with substantial U⁴⁺ substituting for Th) is a tetragonal nesosilicate whose collector specimens are typically black to dark brown, heavily metamict, and distinctly heavy for their size — reflecting the high atomic mass of thorium and uranium in the structure. Hybla-area uranothorite often occurs in association with other REE-bearing and carbonatite-associated minerals, and specimens from this mine carry the strong locality provenance of a named, documented Ontario occurrence.

This is a radioactive specimen. Uranothorite's elevated uranium content produces a stronger radioactive signature than pure thorite, and this specimen should be handled sensibly and stored in accordance with local regulations.

Specimen Details:

Approx. specimen size: 70mm x 40mm x 30mm

Approx. specimen weight: 130 grams

Approx. specimen activity on an SE International Ranger EXP: 9300 CPM

Radioactive Mineral Shipping Policy

All naturally radioactive mineral specimens are available for shipping within Canada only. Due to Transport Canada dangerous goods regulations and Canadian Nuclear Safety Commission requirements, we cannot ship radioactive materials internationally. All specimens are packaged in accordance with excepted quantity guidelines and clearly labeled. Purchasers are responsible for ensuring they are legally permitted to possess radioactive mineral specimens under applicable provincial and federal regulations. If you have questions about a specific specimen's activity level or shipping eligibility, please contact us before purchasing.