Uraninite Altering to Gummite - Eldorado Mine, Port Radium, Great Bear Lake, Northwest Territories, Canada

Please note: This item is an export restricted specimen and requires authorization from the CNSC to export outside of Canada. International customers please see the U & Th Mineral Ordering section link at the bottom of the main page for more information.

Ex. George Kamin Collection

This visually captivating specimen features Uraninite undergoing alteration to Gummite, creating a natural display of secondary oxidation processes. Rich amber-orange and ochre hues contrast beautifully against the dark metallic Uraninite core, illustrating the progressive alteration that occurs when uranium oxides weather over geological time. The color transition and textural complexity make this piece both scientifically instructive and aesthetically striking.

Collected from the historic Eldorado Mine, this specimen embodies the geochemical evolution of one of Canada’s most famous uranium deposits. The Eldorado orebody produced some of the world’s earliest uranium minerals, and altered pieces like this highlight the interplay between mineralogy, radiation, and environment.

From the George Kamin Collection, this piece bears strong provenance and represents a perfect balance of scientific value and natural beauty—an ideal addition to any collection focused on uranium mineralogy, secondary alteration processes, or Canadian mining history.

This specimen comes from my personal collection.

Approx. specimen size: 65mm x 50mm x 40mm

Approx. specimen weight: 110 grams

Approx. specimen activity on an SE International Ranger EXP: 170 000 CPM