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Stone description: light gray
| Wall Number | Country | State | Classification | Source Sort ascending |
|---|---|---|---|---|
| 8rb9 | United States | Ohio | Limestone | Xenia |
| 9RA42 | United States | Illinois | Sandstone | Xenia |
| 14RA15 | United States | Iowa | Dolomite | Winterset |
| 8La46 | United States | Washington | Sandstone | Wilkeson |
| 11LB45 | United States | Kentucky | Sandstone | Whitney Co. |
| 7LB37 | United States | Massachusetts | Gneiss | Westford |
| 5LB15 | United States | Massachusetts | Gneiss | Westford |
| 5RB24 | United States | North Carolina | Granite | Warrenton |
| 6LA3 | United States | Pennsylvania | Sandstone | Wampum |
| 17B | United States | Massachusetts | Granite | W. Chelmsford |
| 1B | United States | Massachusetts | Granite | W. Chelmsford |
| 10LA49 | United States | Michigan | Quartzite | Vulcan |
| 14LA13 | United States | Ohio | Dolomite | Urbana |
| 7RA9 | United States | Alabama | Limestone | Tuscumbia |
| 12RB40 | United States | Alabama | Limestone | Turks Cave |
| 6LA44 | United States | New Hampshire | Granite | Troy |
| 12LA37 | United States | Alabama | Limestone | Trinity |
| 6LA33 | United States | Colorado | Sandstone | Trinidad |
| 13RA46 | United States | Kentucky | Limestone | Trenton |
| 9RA9 | United States | Iowa | Limestone | Tracey Station, Marion Co. |
| 1R5 | United States | Connecticut | Granite | Thomaston |
| 14LA6 | United States | Wisconsin | Dolomite | Taycheedah Twp. Fon du Lac Co. |
| 6LB20 | United States | Ohio | Sandstone | Sunbury |
| 6RB39 | United States | Ohio | Sandstone | Sunbury |
| 11LB14 | United States | Missouri | Dolomite | Stoutland |
| 6LB42 | United States | New Jersey | Sandstone | Stockton |
| 10RB14 | United States | Indiana | Limestone | Stinesville |
| 7RB43 | United States | Wisconsin | Quartzite | Stevens Point |
| 11La1 | United States | Indiana | Dolomite | St. Paul |
| 12RB14 | United States | Missouri | Dolomite | St. Louis |
| 11RA21 | United States | Missouri | Limestone | St. Louis |
| 10La21 | United States | Missouri | Limestone | Springfield |
| 13LB10 | United States | Ohio | Dolomite | Springfield |
| 12RA29 | United States | Ohio | Marble | Spring Mills |
| 12LA35 | United States | Indiana | Limestone | Spencer |
| 12RA33 | United States | Indiana | Limestone | Spencer |
| 10LB39 | Mexico | Pyrophyllite | Sonora State | |
| 9LB33 | Mexico | Pyrophyllite | Sonora State | |
| 9RB31 | Mexico | Pyrophyllite | Sonora State | |
| 13RA20 | United States | Iowa | Limestone | Sigourney Station, Keokuk Co. |
| 11RA29 | United States | Tennessee | Limestone | Sherwood Station |
| 7RB45 | United States | New Mexico | Tuff | Santa Fe |
| 14RB13 | United States | Ohio | Dolomite | Sandusky |
| 13RB10 | United States | Ohio | Dolomite | Sandusky |
| 11RA20 | United States | Texas | Marble | San Saba |
| 6RB24 | United States | North Carolina | Granite | Salisbury |
| 4LB12 | United States | Indiana | Limestone | Salem |
| 4RB12 | United States | Indiana | Limestone | Salem |
| 12RA32 | United States | Indiana | Limestone | Salem |
| 13RB38 | United States | Illinois | Limestone | Sagetown |
| 8La17 | United States | Kentucky | Limestone | Russelville |
| 10LB34 | United States | Connecticut | Gneiss | Roxbury |
| 10RA35 | United States | New Hampshire | Granite | Roxbury |
| 2c | United States | Alabama | Limestone | Rockwood |
| 13RA47 | United States | Alabama | Limestone | Rockwood |
| 8RA11 | United States | Illinois | Limestone | Rockport |
| 11RA23 | United States | Nebraska | Limestone | Roca |
| 8RB7 | United States | Nebraska | Limestone | Roca |
| 8LB6 | United States | Nebraska | Limestone | Roca |
| 1R4 | United States | Connecticut | Granite | Reynold's Bridge |
| 7LB35 | United States | Nevada | Andesite | Reno |
| 9RA39 | United States | Wyoming | Sandstone | Rawlins |
| 11LA2 | United States | Michigan | Dolomite | Raisinville |
| 12RA4 | United States | Illinois | Limestone | Quincy |
| 14RB17 | United States | Iowa | Dolomite | Quarry, Marshall Co. |
| 12LA11 | United States | Ohio | Dolomite | Pt. Marblehead |
| 14Lb46 | United States | Kentucky | Limestone | Princeton |
| 13RA41 | United States | Kentucky | Limestone | Princeton |
| 8RA1 | Portugal | Marble | Ponde do Espinal, Coimbra | |
| 5LA18 | United States | Ohio | Sandstone | Plymouth |
| 8Lb46 | United States | Washington | Sandstone | Pittsburgh |
| 13LA11 | United States | Ohio | Limestone | Piqua River |
| 13RA44 | United States | Kentucky | Limestone | Pilot Knob |
| 5LA9 | United States | Ohio | Sandstone | Piketon |
| 14RB21 | United States | Iowa | Limestone | Pella Station, Marion Co. |
| 13RB33 | United States | Utah | Marble | Payson |
| 9RB39 | United States | Indiana | Sandstone | Paoli |
| 5LB30 | United States | Georgia | Granite | Ogelsby |
| 14RB12 | United States | Indiana | Limestone | Oakdale |
| 12RA34 | United States | Indiana | Limestone | Oakalla |
| 5B | United States | Maine | Granite | North Jay |
| 13LA40 | United States | Ohio | Limestone | Newtonville |
| 6LA20 | United States | Ohio | Sandstone | Newark |
| 8RA36 | United States | Missouri | Sandstone | Nevada |
| 14RB36 | Spain | Limestone | Murcia, Murcia | |
| 6RB40 | United States | Maryland | Gneiss | Mt. Royal |
| 2B | United States | North Carolina | Granite | Mt. Airy |
| 9La2 | United States | Tennessee | Marble | Morristown |
| 14LB1 | United States | Indiana | Dolomite | Montpelier |
| 14RA10 | United States | Pennsylvania | Dolomite | Mill Lane Chester Co. |
| 10RA40 | United States | New Hampshire | Granite | Milford |
| 6RA44 | United States | New Hampshire | Granite | Milford |
| 6RQ | United States | Ohio | Sandstone | McDermont |
| 10Lb46 | United States | Wisconsin | Sandstone | Mauston |
| 10RA37 | United States | New Hampshire | Granite | Mason |
| 10RB45 | United States | New Hampshire | Granite | Mason |
| 11RB10 | United States | Kansas | Dolomite | Marysville |
| 12LA15 | United States | Iowa | Dolomite | Marshalltown |
| 5RB44 | United States | New Hampshire | Granite | Marlborough |
| 9LB23 | United States | Ohio | Sandstone | Marietta |