Dr. George W. Robinson, a consulting editor of Rocks & Minerals, is curator of the A. E. Seaman Mineral Museum and a professor of mineralogy at Michigan Technological University in Houghton, Michigan.
Dr. George R. Dix is a professor of geology in the Department of Earth Sciences at Carleton University, Ottawa, Ontario, Canada.
R. Peter Richards, a consulting editor of Rocks & Minerals, focuses his mineral collecting activities on interesting crystal habits, twinned crystals, and epitactic relationships.
Michel Picard is assistant collections manager in the Earth Science Section at the Canadian Museum of Nature, Ottawa, Ontario, Canada.

