Fluorescent Mineral Database Back to USANebraska, USADawes County | Sheridan County | Sioux CountySelenite and Chalcedony from NebraskaWatermelon Rock from Sioux County, NebraskaSelenite in Chalcedony - Crawford, NebraskaCalcite and Chalcedony - Ogalala National Grassland, NebraskaWatermelon Calcite (Chalcedony and Calcite) - Crawford, NebraskaChalcedony & Calcite from Nebraska, USASelenite and Chalcedony, Hay Springs, Nebraska FMDB Home Page Submit a new specimen! My Collection
