“Two divergent aggregates, in turn consisting of parallel growths of black prismatic crystals of ilvaite (apparently monoclinic), with white calcite. The 3.8 mm measure refers to the whole aggregate. Collection and photo by Gianfranco Ciccolini. Nikon D750, bellows, Luminar 25 mm. ”
Gianfranco Ciccolini - 30th August 2019