Click on thumbnails for a larger image. Please be patient since some of these pages of thumbnail images take some time to load.
These mineral photos are copyrighted by their owners and may not be used without permission.
Comments: Greenish-blue botryoidal crust of woodwardite.
Location: Green River Formation, Uintah Co., Utah, USA.
Scale: Picture size 1.8 mm.
© Thomas Witzke / Abraxas-Verlag