Amethyst from selected localities.
USA | |
| van Laer, W.C. (1979) Tourmalines of the Homestake Pass. Lapidary Journal, 33, 58-64. Gobla, M.J. (2012) Montana Mineral Locality Index. Rocks & Minerals, 87(3), 208-240. |
| various photographs |
| Rocks & Minerals 47:3 pp160-164 |
Glittering Hill Pegmatite, Toll Mountain Occurrence, Little Pipestone Mining District, Jefferson County, Montana, USA