|
North America | |
| [Agate var. Lake Superior Agate] Paul T. Brandes |
|
USA | |
| [Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp. |
| [Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp. |
| [Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp. |
| [Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp. |
| [Agate] Yalmer Primeau collection |
| [Agate] Paul T. Brandes |
| [Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp. |
- Isle Royale National Park
| [Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp. |
| [Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp. |
| [Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp. |
| [Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp. |
| [Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp. |
| [Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp. |
| [Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp. |
| [Agate] Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp. |
| [Agate] MacFall, P.M. (1951) Gem Hunter's Guide (1st ed.). Science and Mathematics Publishing Company, 187 pages. |
| [Agate var. Lake Superior Agate] Brian Cowger |
| [Agate] |
| [Agate] Green, J. C. (1987). Plateau basalts of the Keweenawan North Shore Volcanic Group. Geol. Soc. Am. Centennial Field GuideβNorth-Central Section, 59-62. Ojakangas, R. W. and Matsch, C. L. (1982): Minnesota's Geology. U of Minnesota Press. 255p |
| [Agate] Roadside Geology of Minnesota (2009) Ojakangas, R.W. |
| [Agate var. Lake Superior Agate] Brian Cowger |
| [Agate var. Lake Superior Agate] Brian Cowger |
Keweenaw Point, Grant Township, Keweenaw County, Michigan, USA