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.
Gerstleyite: Na2(Sb,As)8S13·2(H2O)
Comments: Small prismatic crystals and massive cinnabar-red gerstleyite on matrix. Location: Baker mine, U.S. Borax Mine, Boron, Kramer District, Kern Co., California, USA. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag