Spinal da Ciare stream, Cercivento, Udine Province, Friuli Venezia Giulia, Italy
Collection and photo: Giorgio Bortolozzi.
Photo SEM Torino University. Collection Giorgio Bortolozzi.
Blue-greenish crystal aggregates of tyrolite-tangdanite in association with pale sky-blue richelsdorfite. The two species tyrolite and tangdanite are visually indistinguishable here: SEM-EDS analyses have shown that in same cases the S content is high and in other cases is negligible.Collection and photo: Giorgio Bortolozzi.
Very small white crystals of arsenolite with unknown azure mineral (Cu arseniate with sulphur). Collection and photo: Giorgio Bortolozzi.
Bluish crystal aggregates of tyrolite-tangdanite. The two species are visually indistinguishable: SEM-EDS analyses have shown that in same cases the S content is high and in other cases is negligible. Collection and photo: Giorgio Bortolozzi.
Blue-green crystal aggregates of tyrolite-tangdanite. The two species are visually indistinguishable: SEM-EDS analyses have shown that in same cases the S content is high and in other cases is negligible. Collection and photo: Giorgio Bortolozzi.
Photo Giorgio Bortolozzi.