Ankerite after Calcite on Goethite

Item Description

An old-time specimen from Niederschlema, featuring a layer of somewhat pearly, rhombic Ankerite, which is either coating or replacing previously existing Calcite scalenohedrons sitting on a layer of Goethite. The piece is in very good shape overall and has good aesthetics. From the collection of William ("Bill") (1927-2006) and Anne (1928-2021) Cook of Cleveland, Ohio. Collection #4490. This husband and wife duo were actively involved in the mineral world for many decades. Bill was a PhD geologist, and Anne was a mathematician, and they both were very serious mineral collectors. Bill served for many years as adjunct curator of mineralogy at the Cleveland Museum of Natural History, and Anne was inducted into the Micromounters' Hall of Fame on October 12, 2019. Both Bill and Anne, at various times, served as president both of the Mineralogical Society of Cleveland and of the Micromineral Society of the Cleveland Museum of Natural History, and Anne was inducted into the mi The rare barium lithium beryllium phosphate Wilancookite was named in their honor in 2015. The piece originally came from Herb Obodda.