Diopside from selected localities.
USA | |
| Gleba, P. (1978) Massachusetts Mineral and Fossil Localities. Barton, W.R., Goldsmith, C.E. (1968) New England Beryllium Investigations. U.S. Depaartment of the Interior, Bureau of Mines Report of investigations 7070. 177 pages and maps. |
| Cook, 1974 |
Chelmsford Lime Quarries, Chelmsford, Middlesex County, Massachusetts, USA