Muscovite pseudomorph after Epidote (RARE locality specimen)

Item Description

A rarely seen pseudomorph from the famous Pampa Blanca locality in Peru featuring pseudo-metallic, silvery-grey colored Muscovite "rosettes" which are replacing "feather"-like groups of Epidote with minor associated Calcite. This is the ONLY specimen I've seen with this particular replacement from Pampa Blanca, and it comes with a label from Jaroslav Hyrsl, a Czech mineral dealer who personally travels to Peru and purchases material on site, so I know it's genuine. If you're a pseudomorph collector, this is something that I'm sure you don't have in your collection, so don't miss out on a chance to get a really attractive and rare piece for your collection. From the collection of William ("Bill") (1927-2006) and Anne (1928-2021) Cook of Cleveland, Ohio (#12,345). 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.