This is a cluster with a cubic, galena crystals and a nailhead calcite crystal on matrix. The galena is interesting because it shows the growth of an octahedral crystal followed by a simple cubic crystal. The overall dimensions of the piece are 6.3 cm wide by 7.5 cm tall by 3.7 cm front to back. The piece is from the Sweetwater Mine, Reynolds County, Missouri, USA. The crystal cluster is mainly in good condition. Ex Richard Heck Collection.