Agate from
USA | |
| [var. Fortification Agate] Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 348 Richards, R.A. (1956a), Arizona agate hunting, Rocks&Min.: 31: 279-280. |
| MRDS database Dep. ID #10113383, MAS ID #0040210684. |
USA | |
| [var. Fortification Agate] Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 348 Richards, R.A. (1956a), Arizona agate hunting, Rocks&Min.: 31: 279-280. |
| MRDS database Dep. ID #10113383, MAS ID #0040210684. |