the Midwest proFig. 1. Arrows point to single millerite crystals. Large duces agates of one sort or another...mm. Part of a geode collected at Brummett Creek, Brown County, Indiana. Continued on Page 3 COLORADO...Midwest carbonates is millerite (nickel sulfide, NiS). Although fairly rare, millerite has a widespread distribution...Michigan and Wisconsin through Iowa, Illinois, Ohio, Indiana, and Missouri to Halls Gap, Kentucky. Stefano (MinDat...MinDat group if the surficial distribution of millerite had been delineated. Stefano noted that it seems |