Nakauriite
Formula: Cu8(SO4)4(CO3)(OH)6 · 48H2O From Alfredo Petrov: Above: Nakauriite, Nakauri mine, Shinshiro city, Aichi Prefecture, Japan. Width of view 6mm.
Type Locality
Henmilite
Formula: Ca2Cu[B(OH)4]2(OH)4 Henmilite is a rare blue calcium copper borate and was named after Professor Kitinosuke Henmi, and his daughter, Dr. Chiyoko Henmi form Okayama University. The Fuka Mine is the Type Locality, and in fact, is the only locality where henmilite has been found. From Alfredo Petrov: Above: Henmilite,...
Sakuraiite
Formula: (Cu,Zn,Fe)3(In,Sn)S4 From Alfredo Petrov: SAKURAIITE (sakurai-koh) Above: Sakuraiite, stannite, chalcopyrite, sphalerite, Ikuno Mine, Hyogo Prefecture, Japan. Width of view 14mm. Greenish-grey sakuraiite (running from top right to centre left) with mostly darker stannite, yellow chalcopyrite, and, under UV, sphalerite towards the top left. Ex Minerals Unlimited (old label). Ex...