“The photo shows the epitaxy of short prismatic crystals of wurtzite, grown on the faces of the sphalerite tetrahedron, recognizable in this photo for the light brown color, visible between the two wurtzite crystals and the tip of the tetrahedron, visible at the top, just right. The dark color of wurtzite, that always contains a percentage of cadmium, is typical of the locality of discovery. Collection and photo of Gianfranco Ciccolini. Nikon D750, bellows, Luminar 25 mm. ”

“The same subject of the parent photo, seen from the opposite perspective. Epitaxy of wurtzite crystals, grown on the faces of the sphalerite tetrahedron, recognizable in this photo for the light brown color, visible between the two wurtzite crystals and the tip of the tetrahedron, visible at the top, just right. The dark color of wurtzite, that always contains a percentage of cadmium, is typical of the locality of discovery. Collection and photo of Gianfranco Ciccolini. Nikon D750, bellows, Luminar 25 mm. ”