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Stone description: medium-gr
| Wall Number Sort descending | Country | State | Classification | Source |
|---|---|---|---|---|
| 13LA13 | United States | Iowa | Dolomite | Iowa Falls |
| 4L6 | United States | Connecticut | Sandstone | Portland |
| 4LB16 | United States | Delaware | Gneiss | Brandywine |
| 4R6 | United States | Connecticut | Sandstone | Portland |
| 6LA47 | United States | Louisiana | Sandstone | Unknown |
| 8La11 | United States | Illinois | Limestone | Belknap |