Wikimedi'Òc

Diamonds, State Line Kimberlite Field, Colorado-Wyoming.jpg - Tillman

Detrital zircons BSE micrographs NAI 2014 Annual Science Report.jpg - Gretarsson

Blue chalcedony (Fontenelle Reservoir, northeast of Kemmerer, Wyoming, USA) (32437936397).jpg - Ser Amantio di Nicolao

Bacterially precipitated Mn-rich oxides (black) & iron-rich oxides (yellow) mixed with aragonitic travertine, plus minor opaline geyserite at Artesia Geyser's vent (late afternoon, 3 June 2014).jpg - Ser Amantio di Nicolao