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Stone description: light gray
| Wall Number | Country Sort descending | State | Classification | Source |
|---|---|---|---|---|
| 9RB31 | Mexico | Pyrophyllite | Sonora State | |
| 10LB39 | Mexico | Pyrophyllite | Sonora State | |
| 10RA29 | Mexico | Andesite | Ixtapalapa | |
| 9LB33 | Mexico | Pyrophyllite | Sonora State | |
| 8RA1 | Portugal | Marble | Ponde do Espinal, Coimbra | |
| 14LA45 | Portugal | Limestone | Ega, Coimbra | |
| 14LA46 | Portugal | Limestone | Janianes, Coimbra | |
| 8LA2 | Portugal | Marble | Ameixoira, Coimbra | |
| 14RB36 | Spain | Limestone | Murcia, Murcia | |
| 9RA42 | United States | Illinois | Sandstone | Xenia |
| 11B | United States | New Hampshire | Granite | Concord |
| 13RA41 | United States | Kentucky | Limestone | Princeton |
| 5B | United States | Maine | Granite | North Jay |
| 8La46 | United States | Washington | Sandstone | Wilkeson |
| 12LB35 | United States | Indiana | Limestone | Bedford |
| 14RA16 | United States | Iowa | Dolomite | Franklin |
| 6RB20 | United States | Ohio | Sandstone | Amherst |
| 14RA2 | United States | Illinois | Dolomite | Joilet |
| 6RB24 | United States | North Carolina | Granite | Salisbury |
| 9RA9 | United States | Iowa | Limestone | Tracey Station, Marion Co. |
| 11La1 | United States | Indiana | Dolomite | St. Paul |
| 13RA43 | United States | Kentucky | Limestone | Hopkinsville |
| 5LA18 | United States | Ohio | Sandstone | Plymouth |
| 8Lb46 | United States | Washington | Sandstone | Pittsburgh |
| 12RA1 | United States | Indiana | Limestone | Bedford |
| 12RA11 | United States | Kentucky | Limestone | Lagrange |
| 14RA28 | United States | Tennessee | Limestone | Carter's Station Creek |
| 6RB28 | United States | New York | Sandstone | Canisteo |
| 9RB13 | United States | Iowa | Limestone | Conrad |
| 11LA12 | United States | Missouri | Dolomite | Jefferson City |
| 13RA44 | United States | Kentucky | Limestone | Pilot Knob |
| 5LA9 | United States | Ohio | Sandstone | Piketon |
| 8LB6 | United States | Nebraska | Limestone | Roca |
| 12RA16 | United States | Iowa | Dolomite | Farley |
| 14RB12 | United States | Indiana | Limestone | Oakdale |
| 6rb33 | United States | Colorado | Tuff | Castle rock |
| 9RB21 | United States | Ohio | Sandstone | Berea |
| 11La17 | United States | Iowa | Dolomite | Lansing |
| 13RA46 | United States | Kentucky | Limestone | Trenton |
| 5LB12 | United States | Massachusetts | Granite | Freetown |
| 8r48 | United States | Ohio | Sandstone | Berea |
| 12RA29 | United States | Ohio | Marble | Spring Mills |
| 14RB13 | United States | Ohio | Dolomite | Sandusky |
| 6RB39 | United States | Ohio | Sandstone | Sunbury |
| 11LA2 | United States | Michigan | Dolomite | Raisinville |
| 13RA47 | United States | Alabama | Limestone | Rockwood |
| 5LB15 | United States | Massachusetts | Gneiss | Westford |
| 12RA3 | United States | Illinois | Dolomite | Chicago |
| 14RB16 | United States | Iowa | Dolomite | Franklin |
| 6RB40 | United States | Maryland | Gneiss | Mt. Royal |
| 9RB39 | United States | Indiana | Sandstone | Paoli |
| 11LA23 | United States | Kansas | Limestone | Eldorado |
| 13RB10 | United States | Ohio | Dolomite | Sandusky |
| 5LB30 | United States | Georgia | Granite | Ogelsby |
| 8RA10 | United States | Illinois | Limestone | Chester |
| 12RA30 | United States | Illinois | Limestone | Joliet |
| 14RB17 | United States | Iowa | Dolomite | Quarry, Marshall Co. |
| 6RB44 | United States | New Hampshire | Granite | Keene |
| 9RB40 | United States | Indiana | Sandstone | Attica |
| 11LA24 | United States | Tennessee | Marble | Knoxville |
| 13RB12 | United States | Ohio | Dolomite | Greenfield |
| 5LB32 | United States | Colorado | Granite | Lawson |
| 8RA11 | United States | Illinois | Limestone | Rockport |
| 12RA32 | United States | Indiana | Limestone | Salem |
| 14RB21 | United States | Iowa | Limestone | Pella Station, Marion Co. |
| 6RB46 | United States | Vermont | Granite | Barre |
| 11LA7 | United States | Pennsylvania | Marble | Cedar Hollow Lime Co. |
| 13RB16 | United States | Iowa | Dolomite | Farley |
| 5LB38 | United States | Maryland | Gneiss | Baltimore |
| 8RA12 | United States | Illinois | Limestone | Jonesborough |
| 12RA33 | United States | Indiana | Limestone | Spencer |
| 14RB28 | United States | Tennessee | Limestone | Columbia |
| 6RB7 | United States | Pennsylvania | Sandstone | Cannonsburgh |
| 11LA8 | United States | Kansas | Limestone | Florence |
| 13RB2 | United States | Illinois | Dolomite | Joilet |
| 5RA15 | United States | Ohio | Sandstone | Cambridge |
| 8RA13 | United States | Indiana | Limestone | Bedford |
| 12RA34 | United States | Indiana | Limestone | Oakalla |
| 6RQ | United States | Ohio | Sandstone | McDermont |
| 11LB14 | United States | Missouri | Dolomite | Stoutland |
| 13RB23 | United States | Texas | Limestone | Austin |
| 5RA39 | United States | Maryland | Gneiss | Baltimore |
| 8RA14 | United States | Indiana | Limestone | Avoca |
| 12RA36 | United States | Kentucky | Limestone | Garrett |
| 14RB4 | United States | Illinois | Dolomite | Kankakee |
| 7La18 | United States | Pennsylvania | Quartzite | Mapleton |
| 11LB2 | United States | Wisconsin | Dolomite | Fon du Lac |
| 13RB24 | United States | Nebraska | Limestone | Glen Rock |
| 5RB2 | United States | Ohio | Sandstone | Canal Dover Tuscarawas Co. |
| 8RA16 | United States | Indiana | Limestone | Ellettsville |
| 12RA4 | United States | Illinois | Limestone | Quincy |
| 14RB45 | United States | Kentucky | Limestone | Frankfort |
| 7LA22 | United States | North Carolina | Granite | Asheville |
| 11LB45 | United States | Kentucky | Sandstone | Whitney Co. |
| 13RB33 | United States | Utah | Marble | Payson |
| 5RB24 | United States | North Carolina | Granite | Warrenton |
| 8RA17 | United States | Kentucky | Limestone | Franklin |
| 12RB14 | United States | Missouri | Dolomite | St. Louis |
| 17B | United States | Massachusetts | Granite | W. Chelmsford |
| 7LA23 | United States | North Carolina | Granite | Buckhorn Falls |