Set of 4 postcards featuring exquisite specimens of phenakite, galena, marcasite, and chalcocite. (To learn more about these and other minerals, visit our Minerals of Wisconsin database.)
Large downloads come in ZIP archives. You will need an application capable of unpacking ZIP archives, such as WinZIP, WinRAR, or 7-zip.
Contact one of our experts for an answer from a real, live geologist.
3817 Mineral Point Road
Madison, Wisconsin 53705-5100