A twinned orange calcite from the Tri-State District. This has been cleaned with acid-- apparently this was standard practice among the miners who would bring these out, back when the miners were in operation. I have seen a few elsewhere, and they always have the same wet look, indicative of treatment in an acid bath. Operated since the 1850's, the last mine in the district closed in 1967. Like other towns in the district, Picher was deserted, a victim of the toxic mine tailing dunes that earned it a place on the list of Superfund sites.