Oligoclase Feldspar
Hawk mine, 1.2 miles north of Hawk, Mitchell County, North Carolina, USA
Thumbnail, 2.4 x 2.0 x 1.5 cm
A gemmy single, etched crystal showing still some flat faces as well, from this very old locality. The piece is from the Ex. American Museum of Natural History and shows a Bement collection numbering on the bottom (shown as top, for the photo here).