Sincosite (very rare)

Item Description

An incredibly hard to find specimen featuring rich green bladed crystals of Sincosite measuring up to 2 mm on matrix. Sincosite is a rare calcium vanadate phosphate species, named in 1922 after a locality called Sincos in Peru. The crystals are best seen up close, and we've photographed them with a macro lens to better illustrate their quality. Nearly impossible to find on the market now, so if you collect rare minerals, don't miss out.
From the collection of William ("Bill") (1927-2006) and Anne (1928-2021) Cook of Cleveland, Ohio (#10,066) with a label from Tom Loomis. 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.