Lucchesiite, Quartz
Mirošov, Žďár nad Sázavou District, Vysočina Region, Czech Republic
Nice black crystals of schorl-like lucchesiite, the calcium-oxygen-dominant analogue of schorl, from its second / co-type, Czech locality. This is a gift from my friend, Petr Gadas, who scientifically specialize in the tourmaline group. Many thanks, Petrku!
© Łukasz Kruszewski 2019