Citation: B. Cook Robert, Connoisseur's choice: cuprite, Mashamba West Mine, Shaba, democratic republic of Congo, and Red Dome Mine, Queensland, Australia, Rocks and minerals , 76(4), 2001, pp. 248-251
Citation: B. Cook Robert, Connoisseur's choice: chrysoberyl , Minas Gerais and Bahia, Brazil, and Takovaja, Russia, Rocks and minerals , 74(5), 1999, pp. 324-327
Citation: B. Cook Robert, Connoisseur's choice : diamond, Jagersfontein mine, free state province, south Africa, Rocks and minerals , 75(5), 2000, pp. 344-349
Citation: B. Cook Robert, Connoisseur's choice: sylvanite, vindicator mine, cripple creek, teller county, Colorado, Rocks and minerals , 80(5), 2005, pp. 344-348
Citation: B. Cook Robert, Connoisseur's choice: hemimorphite pseudomorphs after calcite, Joplin, Missouri, Rocks and minerals , 72(6), 1997, pp. 384-386