Saponite from selected localities.
USA | |
| Robinson, George, 2004, Mineralogy of Michigan |
Collection Elmar Lackner; Robinson, George, 2004, Mineralogy of Michigan | |
USGS PP144 | |
| Robinson, G.W. (2004) Mineralogy of Michigan by E.W. Heinrich (2nd edition). A.E. Seaman Mineral Museum, Michigan Technological University, Houghton, Michigan, 252 pages. |
Laurium Mine, Osceola Township, Houghton County, Michigan, USA