An old label cut from a larger list says "from Barr Mine, Treece, Kansas, Boodle Lane, November 6, 1937." So this large and impressive old Tri-State specimen has a very specific date and locality to it! It consists of sharp cubes of galena on a glittering mass of microcrystalline, deep red sphalerite (the maroon color shows up under strong light), with minor associated marcasite. It seems to have formed as a thick knob around dolomite which you can now see in the center of the underside of the specimen.