| Nishna Valley Rock Club, 1101 Hill Street, Harlan, Iowa 51537 |
| Rock Club of Cedar Rapids, 2237 Meadowbrook Drive SE, Cedar Rapids, Iowa 52403 |
| Dallias County Rock Club, 7304 Wilshire Boulevard, Des Moines, Iowa 50322 |
| Des Moines Lapidary Society, 2608 24th Street, Des Moines, Iowa 50310 |
| The Sac and Fox Lapidary Club, 1007 East Jefferson Avenue, Fairfield, Iowa 52556 |
| Des Moines Valley Rocks and Relics Club, 1511 265th Avenue, West Point, Iowa 52656 |
| River Valley Rockhound Club, 3521 10Th Avenue North, Ft. Dodge, Iowa 50501 |
| N.W. Iowa Rocks and Fossils, P.O. Box 56, 311 Sweet Avenue, Linn Grove, Iowa 51033-0056 |
| Central Iowa Mineral Society, 11248 NW 150th Avenue, Madrid, Iowa 50156 |
| Chicauqua Rockhound Society, P.O. Box 134, New London, Iowa 52645 |
| Geode Rock and Mineral Society, 405 West Main, New London, Iowa 52645 |
| Siouxland Gem and Mineral Society, 1825 Elkhart Avenue, Sioux City, Iowa 51102 |
| Storm Lade Area Rockhounds, 6416 120th Avenue, Storm Lake, Iowa 50588 |
| Black Hawk Gem and Mineral Society, P.O. Box 717, Shell Rock, Iowa 50670 |
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