Chalcedony from Lordsburg Mining District, Pyramid Mountains, Hidalgo County, New Mexico, USA
USA | |
| Northrop, Stuart A., LaBruzza, F.A. (1996) Minerals of New Mexico (3rd ed.) University of New Mexico Press, Albuquerque, NM. |
| Luetcke, Rolf (n.d.) Personal communication. |
Ada Etta Mine, Virginia District, Lordsburg, Lordsburg Mining District, Pyramid Mountains, Hidalgo County, New Mexico, USA