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Stone description: light gray
| Wall Number | Country | State | Classification | Source Sort descending |
|---|---|---|---|---|
| 4LB12 | United States | Indiana | Limestone | Salem |
| 4RB12 | United States | Indiana | Limestone | Salem |
| 12RA32 | United States | Indiana | Limestone | Salem |
| 6RB24 | United States | North Carolina | Granite | Salisbury |
| 11RA20 | United States | Texas | Marble | San Saba |
| 14RB13 | United States | Ohio | Dolomite | Sandusky |
| 13RB10 | United States | Ohio | Dolomite | Sandusky |
| 7RB45 | United States | New Mexico | Tuff | Santa Fe |
| 11RA29 | United States | Tennessee | Limestone | Sherwood Station |
| 13RA20 | United States | Iowa | Limestone | Sigourney Station, Keokuk Co. |
| 9LB33 | Mexico | Pyrophyllite | Sonora State | |
| 9RB31 | Mexico | Pyrophyllite | Sonora State | |
| 10LB39 | Mexico | Pyrophyllite | Sonora State | |
| 12LA35 | United States | Indiana | Limestone | Spencer |
| 12RA33 | United States | Indiana | Limestone | Spencer |
| 12RA29 | United States | Ohio | Marble | Spring Mills |
| 10La21 | United States | Missouri | Limestone | Springfield |
| 13LB10 | United States | Ohio | Dolomite | Springfield |
| 12RB14 | United States | Missouri | Dolomite | St. Louis |
| 11RA21 | United States | Missouri | Limestone | St. Louis |
| 11La1 | United States | Indiana | Dolomite | St. Paul |
| 7RB43 | United States | Wisconsin | Quartzite | Stevens Point |
| 10RB14 | United States | Indiana | Limestone | Stinesville |
| 6LB42 | United States | New Jersey | Sandstone | Stockton |
| 11LB14 | United States | Missouri | Dolomite | Stoutland |
| 6RB39 | United States | Ohio | Sandstone | Sunbury |
| 6LB20 | United States | Ohio | Sandstone | Sunbury |
| 14LA6 | United States | Wisconsin | Dolomite | Taycheedah Twp. Fon du Lac Co. |
| 1R5 | United States | Connecticut | Granite | Thomaston |
| 9RA9 | United States | Iowa | Limestone | Tracey Station, Marion Co. |
| 13RA46 | United States | Kentucky | Limestone | Trenton |
| 6LA33 | United States | Colorado | Sandstone | Trinidad |
| 12LA37 | United States | Alabama | Limestone | Trinity |
| 6LA44 | United States | New Hampshire | Granite | Troy |
| 12RB40 | United States | Alabama | Limestone | Turks Cave |
| 7RA9 | United States | Alabama | Limestone | Tuscumbia |
| 14LA13 | United States | Ohio | Dolomite | Urbana |
| 10LA49 | United States | Michigan | Quartzite | Vulcan |
| 17B | United States | Massachusetts | Granite | W. Chelmsford |
| 1B | United States | Massachusetts | Granite | W. Chelmsford |
| 6LA3 | United States | Pennsylvania | Sandstone | Wampum |
| 5RB24 | United States | North Carolina | Granite | Warrenton |
| 5LB15 | United States | Massachusetts | Gneiss | Westford |
| 7LB37 | United States | Massachusetts | Gneiss | Westford |
| 11LB45 | United States | Kentucky | Sandstone | Whitney Co. |
| 8La46 | United States | Washington | Sandstone | Wilkeson |
| 14RA15 | United States | Iowa | Dolomite | Winterset |
| 9RA42 | United States | Illinois | Sandstone | Xenia |
| 8rb9 | United States | Ohio | Limestone | Xenia |