Description
THREE SPHALERITES Including a sphalerite, lustrous isolated "ruby jack" crystals on matrix, Joplin, Jasper Co., Missouri, USA, measuring 9 x 8 x 5 cm ; together with another Sphalerite, "black jack" large crystals and marmatite, Tri-State District, USA, measuring 4 cm ; together with a third sphalerite with dark marmatite...