Gummite from selected localities.
USA | |
| King, V. (ed.), 2009, Maine feldspar, Families, and Feuds |
| King & Foord, 1994. Mineralogy of Maine, V.1 |
USA | |
| King, V. (ed.), 2009, Maine feldspar, Families, and Feuds |
| King & Foord, 1994. Mineralogy of Maine, V.1 |