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.
Tincalconite: Na6[B4O5(OH)4]3·8(H2O)
Comments: Pristine white tincalconite pseudomorph after a single borax crystal. Location: Boron, Kramer District, Kern Co., California, USA. Scale: 30x14x5 mm. © John Betts - Fine Minerals