Calcite ps. Glauberite
Camp Verde, Camp Verde Mining Dist., Yavapai Co., Arizona, USA
Thumbnail, 2.8 x 2.4 x 1.6 cm
Ex. Shields and Frances Flynn

This ghostly white floater is a cluster of crystals of calcite, and the calcite has replaced the earlier crystals of glauberite faithfully to their strange, sharp shape. An Arizona classic, but quite rare in thumbnail size, especially as a cluster.