Speak about unusual!- Here we have Galena crystals on matrix, with tiny Sphalerite crystals. One large Galena crystal is mostly covered with a druse of very small Marcasite crystals, most unusual!
Dimensions: 5.6 x 3.6 x 3.2cm
Species: Galena with Sphalerite and Marcasite
Locality: Tri-State District, Joplin, Missouri, USA