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Stone description: blue gray
| Wall Number | Country | State | Classification | Source Sort ascending |
|---|---|---|---|---|
| 9LB31 | United States | New York | Sandstone | Watkins Glen |
| 9LA28 | United States | New York | Sandstone | Warsaw |
| 11RA2 | United States | Washington | Marble | Stevens Co. |
| 9La17 | United States | Pennsylvania | Sandstone | Schickshinny Luzerne Co. |
| 13RA37 | United States | Pennsylvania | Limestone | Richland Station Lebanon Co. |
| 8LB17 | United States | Pennsylvania | Limestone | Richland Station Lebanon Co. |
| 4RB14 | United States | Massachusetts | Granite | Quincy |
| 9RB28 | United States | New York | Sandstone | Pultney |
| 8LB30 | United States | New York | Sandstone | Phoenicia |
| 9RA29 | United States | New York | Sandstone | Phoenicia |
| 7La26 | United States | New York | Sandstone | Oneonta |
| 9RB37 | United States | Oregon | Sandstone | Oakland |
| 13RB37 | United States | Pennsylvania | Limestone | Myerstown |
| 6LB28 | United States | New York | Sandstone | Mt. Pleasant |
| 6La7 | United States | Pennsylvania | Sandstone | Meshoppen |
| 7RB25 | United States | New York | Sandstone | Margarettville |
| 6RA1 | United States | Pennsylvania | Sandstone | Mainesburgh |
| 9RB26 | United States | New York | Sandstone | Huntersland |
| 8RA28 | United States | New York | Sandstone | Guilford |
| 13B | United States | Georgia | Granite | Elberton |
| 7La13 | United States | Pennsylvania | Limestone | East Conshohocken |
| 8RA29 | United States | New York | Sandstone | Corning |
| 13RB22 | United States | Texas | Marble | Burnet |