" Sphalerite, Marcasite, Barite Quartz Association ...
This beautiful specimen contains an association of glimmering, iridescent druzy marcasite crystals, several deep red sphalerite "flowers", aggregations of white barite and a bed of quartz crystal druze from which the crystals formed. It comes from the Washington County Aggregates Quarry in the Potosi Barite District of Missouri.