Dear colleagues, we are about to renew our mineral standards for electron microprobe. I am aware that one can order the ready-to-go 27, 28 or 53 mineral blocks but want to explore additional opportunities. In the past, we have also used Cameca and other sets. If anyone has an appreciated, recent supplier for polished blocks or mineral sets for self-mounting, I would be grateful for advice. With many thanks and best wishes, David -- David Dolejs (Professor of Mineralogy & Petrology) Institute of Earth and Environmental Sciences, University of Freiburg Albertstr. 23b, 79104 Freiburg i.Br., Germany Tel direct: +49 (0)761 203 6395 / secretary: +49 (0)761 203 6396 Web: http://www.minpetro.uni-freiburg.de/team/dolejs