Hi everyone, I have a student in my department who will be doing chemical weathering experiments on common carbonate minerals including calcite, dolomite, magnesite, and siderite. Do those of you in the carbonate world know of a good source to get relatively chemically pure but natural samples of each of these minerals? Thanks in advance for any ideas you might have. Best, Dan DR. DANIEL HUMMER Assistant Professor of Geology SCHOOL OF EARTH SYSTEMS AND SUSTAINABILITY MAIL CODE 4324 SOUTHERN ILLINOIS UNIVERSITY 207 PARKINSON LABORATORY 1259 LINCOLN DRIVE CARBONDALE, ILLINOIS 62901 daniel.hummer@siu.edu<mailto:daniel.hummer@siu.edu> P: 618.453.7386 SIU.EDU [SIU_email_2line]