Oklo Mine, Léboumbi-Leyou Department, Haut-Ogooué Province, Gabon

Thin prisms of curite with orange wölsendorfite and an unknown yellow mineral that is most likely compreignicite or leesite. The pale tan crystalline bed at bottom is rutherfordine. All 4 minerals analyzed by Dr. Travis Olds. Uraninite is at the back of the vug. I obtained this specimen from Excalibur Minerals who had only the wölsendorfite ...

© 2024 Chuck Adan

A historical sample of orange francevillite with yellow curienite from the only known location of a natural nuclear reactor. This piece was acquired from Éric Asselborn (asselbornite) through Kevin Downey in February of 2024. The child photo is a close up of some francevillite crystals which have formed around uraninite, with curienite to one ...

© 2025 Chuck Adan

Orange to red wolsendorfite with a yellow mineral that analysis shows is most likely either compeignicite or leesite. There is also tan-yellow rutherfordine along the edges. All analysis courtesy of Dr Travis Olds. I obtained this specimen from Excalibur Minerals who had only the wolsendorfite listed. They got it from Forrest Cureton who may ...

© 2024 Chuck Adan

A historical sample of orange francevillite with yellow curienite from the only known location of a natural nuclear reactor. This piece was acquired from Éric Asselborn (asselbornite) through Kevin Downey in February of 2024. The child photo is a close up of some francevillite crystals which have formed around uraninite, with curienite to one ...

© 2025 Chuck Adan