Gummite from Llano County, Texas, USA
USA | |
| Am Min (1932) Volume 17, pages 381-390, USGS Bulletin 340, pp. 286-294. (1908) |
| Self-collected by Franklin Roberts. |
| Self-collected by David Aldridge, March, 2006. |
USA | |
| Am Min (1932) Volume 17, pages 381-390, USGS Bulletin 340, pp. 286-294. (1908) |
| Self-collected by Franklin Roberts. |
| Self-collected by David Aldridge, March, 2006. |