Hiortdahlite
San Vito Quarry, San Vito, Ercolano, Mount Somma, Somma-Vesuvius Complex, Naples, Campania, Italy
Sony Alpha 7R ii, bellows, Mitutoyo M Plan 20x, aperture, Raynox DCR-250 retro, Stack-Master linear actor, stack shot control. Collection and photo: Stephan Wolfsried
Note: actually, the Somma-Vesuvius "hiortdahlite" crystals (also known as "guarinite") are made up of domains of various mineral phases (hiortdahlite polytypes, wöhlerite, ...
© Stephan Wolfsried 9/2016