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Stone description: light blue gray
| Wall Number | Country | State | Classification Sort descending | Source |
|---|---|---|---|---|
| 6La17 | United States | Pennsylvania | Sandstone | Skinner's Eddy |
| 6Lb5 | United States | Pennsylvania | Sandstone | Nicholson |
| 6RA30 | United States | Kentucky | Sandstone | Whitney Co. |
| 6RB8 | United States | Pennsylvania | Sandstone | Black Walnut |
| 8RA31 | United States | Kentucky | Sandstone | Pineville |
| 11LA34 | United States | South Carolina | Marble | Unknown |
| 9RB16 | United States | Maryland | Marble | New Windsor |
| 8LB25 | United States | North Carolina | Gneiss | Raleigh |