One little speck of Feinglosite in a capsule. Feinglosite is a lead-zinc arsenate discovered at Tsumeb.
Dr. Feinglos gave me this specimen, which is from the holotype specimen. Please see prov tab for label. Mark passed away in 2020 shortly after the Tucson show. He was Professor at the Duke University Medical Center, Durham, North Carolina and in 2003 was awarded the William Pinch Medal in 2003.