Santa Eulalia District, Mun. de Aquiles Serdán, Chihuahua, Mexico
Several cubic crystals of purple-blue Fluorite to 7 mm, with beveled edges and with color zoning are perched on white, terminated scalenohedral crystals of Calcite. Bright, brassy Chalcopyrite provides an accent. This is very good quality for this District, where Fluorite is a not a common species. It is free of damage, and with Willard Perkin's original thumbnail mounting and labels.
ex. Willard Perkin specimen