Willemite from
USA | |
| Brown, J.S. (1936) Supergene sphalerite, galena, and willemite at Balmat, NY. Economic Geology: 31: 331-354. |
Chamberlain, Steven C., Robinson, George W., Robinson, Susan M. (2023) New York State: A Topographic Mineralogy (1st ed.) Self published. 352pp. | |
A.Mathauser collection |
Balmat, Balmat-Edwards Zinc Mining District, St. Lawrence County, New York, USA