Vonsenite
Tre Croci, Vetralla, Viterbo Province, Lazio, Italy
A prismatic crystal of vonsenite, black, shiny, well-finished. A significant finding for the species, which is usually in the form of opaque needle-like crystals. On sanidine, on the left, and on cancrenite group, white, altered, on the right. Analyzed by means of EDS. Collection and photo by Gianfranco Ciccolini. Nikon D750, two bellows, Luminar ...