Wikimedi'Òc

Agate in chert (Rex Chert Member, Phosphoria Formation, Permian; Astoria Hot Springs roadcut, Teton County, Wyoming, USA) 2 (49192507547).jpg - Ser Amantio di Nicolao

Agate in chert (Rex Chert Member, Phosphoria Formation, Permian; Astoria Hot Springs roadcut, Teton County, Wyoming, USA) 1 (49192509272).jpg - Ser Amantio di Nicolao

Agate in chert (Rex Chert Member, Phosphoria Formation, Permian; Astoria Hot Springs roadcut, Teton County, Wyoming, USA) 3 (49192505772).jpg - Ser Amantio di Nicolao

Agate in chert (Rex Chert Member, Phosphoria Formation, Permian; Astoria Hot Springs roadcut, Teton County, Wyoming, USA) 4 (49192503907).jpg - Ser Amantio di Nicolao