This barite (baryte) is from Stoneham in Weld County, Colorado, USA. This area contains a handful of minerals but is famous for the quality barite specimens found there. Barite is a sulfate that contains the elements Ba,S and O. This piece consists of several elongated and parallel crystals that have a flattened rod shape.. The crystals are blue translucent and they have a greasy luster.This piece measures 2 x 5/8 x 3/8 inches or 50 x 16 x 9 mm.