Six microscopic magnifications of minerals, Cohen, c. 1880 - in or before 1885 photomechanical print Image 1 is kliklian, 2 is trichist, 3 is Microlia, 3 is Microlite and Kleak Clips in Obsidian, 4 is Cummuliet and 6 is Augustet. GreifswaldOffenburg paper collotype minerals and metals
Size: 5782px × 4204px
Photo credit: © piemags/rmn / Alamy / Afripics
License: Licensed
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