John Cancalosi / Brazilian agate, slice, with MR. Sad Face design.
01557629
John Abbott / Chalcedony midget moth (Elaphria chalcedonia) on white background, Tuscaloosa County, Alabama, USA October
01557628
John Abbott / Chalcedony midget moth (Elaphria chalcedonia), Tuscaloosa County, Alabama, USA October
01549470
John Cancalosi / Spherulitic or orbicular chalcedony, 'ocean jasper', a cryptocrystaline quartz from Madagascar.
01554955
Philippe Clement / Chalcedony specimen, cryptocrystalline form of silica, composed of very fine intergrowths of quartz and moganite on white background
01513348
John Cancalosi / Agua nueva agate, cryptocrystaline quartz, Mexico.
01506474
John Cancalosi / Brazilian agate slice.
01504857
John Cancalosi / Brazilian agate slice in shape of USA.
01448101
John Cancalosi / Chalcedony, variety agate (SiO2) from Rio Grande do Sul, Brazil.
01175690
Adrian Davies / Rock crystals containing Chalcedony, from Cornwall, UK
