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Stone description: light gray
| Wall Number Sort descending | Country | State | Classification | Source |
|---|---|---|---|---|
| 7RB43 | United States | Wisconsin | Quartzite | Stevens Point |
| 7RB45 | United States | New Mexico | Tuff | Santa Fe |
| 8L48 | United States | Ohio | Sandstone | Berea |
| 8LA12 | United States | Illinois | Limestone | Kinderhook |
| 8LA13 | United States | Indiana | Limestone | Fort Ritner |
| 8LA15 | United States | Indiana | Limestone | Greenscastle |
| 8La17 | United States | Kentucky | Limestone | Russelville |
| 8LA2 | Portugal | Marble | Ameixoira, Coimbra | |
| 8LA30 | United States | New York | Sandstone | Lockport |
| 8LA36 | United States | Missouri | Sandstone | Clinton |
| 8La46 | United States | Washington | Sandstone | Wilkeson |
| 8Lb46 | United States | Washington | Sandstone | Pittsburgh |
| 8LB6 | United States | Nebraska | Limestone | Roca |
| 8r48 | United States | Ohio | Sandstone | Berea |
| 8RA1 | Portugal | Marble | Ponde do Espinal, Coimbra | |
| 8RA10 | United States | Illinois | Limestone | Chester |
| 8RA11 | United States | Illinois | Limestone | Rockport |
| 8RA12 | United States | Illinois | Limestone | Jonesborough |
| 8RA13 | United States | Indiana | Limestone | Bedford |
| 8RA14 | United States | Indiana | Limestone | Avoca |
| 8RA16 | United States | Indiana | Limestone | Ellettsville |
| 8RA17 | United States | Kentucky | Limestone | Franklin |
| 8RA24 | United States | North Carolina | Sandstone | Durham |
| 8RA36 | United States | Missouri | Sandstone | Nevada |
| 8RB15 | United States | Utah | Limestone | Ephriam |
| 8RB19 | United States | Pennsylvania | Sandstone | Corry |
| 8RB7 | United States | Nebraska | Limestone | Roca |
| 8rb9 | United States | Ohio | Limestone | Xenia |
| 9La10 | United States | Iowa | Limestone | Keosauque Station |
| 9LA13 | United States | Kansas | Limestone | Manhattan |
| 9LA18 | United States | Pennsylvania | Sandstone | Antrim |
| 9La2 | United States | Tennessee | Marble | Morristown |
| 9LA39 | United States | Indiana | Sandstone | French Lick Twp. |
| 9LA41 | United States | Illinois | Sandstone | Chester |
| 9LA5 | United States | Missouri | Limestone | Barrett's Station |
| 9LA9 | United States | Iowa | Limestone | Burlington |
| 9LB10 | United States | Iowa | Limestone | Bristow |
| 9LB13 | United States | Iowa | Limestone | Burlington |
| 9LB23 | United States | Ohio | Sandstone | Marietta |
| 9LB24 | United States | Massachusetts | Gneiss | Charlton |
| 9LB33 | Mexico | Pyrophyllite | Sonora State | |
| 9RA39 | United States | Wyoming | Sandstone | Rawlins |
| 9RA42 | United States | Illinois | Sandstone | Xenia |
| 9RA9 | United States | Iowa | Limestone | Tracey Station, Marion Co. |
| 9RB13 | United States | Iowa | Limestone | Conrad |
| 9RB21 | United States | Ohio | Sandstone | Berea |
| 9RB31 | Mexico | Pyrophyllite | Sonora State | |
| 9RB39 | United States | Indiana | Sandstone | Paoli |
| 9RB40 | United States | Indiana | Sandstone | Attica |