Dims: 3.1" x 2.0" x 1.2" (7.9 x 5.1 x 3.0 cm)
Wt: 2.57 oz. (73.1 g)
Clay Center, Ohio, U.S.A.
This small hand specimen consists of a calcareous shale base on which rest at least 20 cubic Fluorite crystals. Almost all of them are in excellent condition, having little damage and excellent form, with well-defined edges and clean, smooth faces that have a vitreous luster. They have a faint yellow coloration and are transparent and very clear. They do not exceed 0.3" (8 mm) in all dimensions, though one crystal in particular has dimensions of 0.5 x 0.2 x 0.2" (1.3 x 0.5 x 0.5 cm). Among the Fluorites are several thin blades of celestite that show considerable damage. All are colorless, transparent and clear, with a vitreous luster. There are also scores of tiny, cream-colored scalenohedral calcite crystals that do not exceed 1 or 2 mm in length. They have a dull luster and are translucent at best. These crystals were found in a 600-foot-deep pocket in the Silica Shale formation. They accompanied a fossil find that dates back to the Ordovician period.