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Stone description: light gray
| Wall Number | Country | State | Classification Sort ascending | Source |
|---|---|---|---|---|
| 13LA20 | United States | Iowa | Coral | Iowa City |
| 5RB26 | United States | Maryland | Conglomerate | Cumberland |
| 7LB35 | United States | Nevada | Andesite | Reno |
| 10RA29 | Mexico | Andesite | Ixtapalapa | |
| 9LB33 | Mexico | Pyrophyllite | Sonora State | |
| 10LB39 | Mexico | Pyrophyllite | Sonora State | |
| 9RB31 | Mexico | Pyrophyllite | Sonora State | |
| 6RB1 | United States | Pennsylvania | Quartzite | Huntingdon |
| 10LA49 | United States | Michigan | Quartzite | Vulcan |
| 7RB43 | United States | Wisconsin | Quartzite | Stevens Point |
| 6RA19 | United States | Pennsylvania | Quartzite | Jacksonwald |
| 7La18 | United States | Pennsylvania | Quartzite | Mapleton |
| 9LB24 | United States | Massachusetts | Gneiss | Charlton |
| 6RB18 | United States | Pennsylvania | Gneiss | Chester |
| 7LB37 | United States | Massachusetts | Gneiss | Westford |
| 10LB34 | United States | Connecticut | Gneiss | Roxbury |
| 5LB15 | United States | Massachusetts | Gneiss | Westford |
| 6RB40 | United States | Maryland | Gneiss | Mt. Royal |
| 5LB38 | United States | Maryland | Gneiss | Baltimore |
| 5RA39 | United States | Maryland | Gneiss | Baltimore |
| 6rb33 | United States | Colorado | Tuff | Castle rock |
| 7RB45 | United States | New Mexico | Tuff | Santa Fe |
| 11RA13 | United States | Missouri | Dolomite | De Soto |
| 12RB14 | United States | Missouri | Dolomite | St. Louis |
| 13RA2 | United States | Illinois | Dolomite | Lemont |
| 11RA14 | United States | Iowa | Dolomite | Lansing |
| 14RA10 | United States | Pennsylvania | Dolomite | Mill Lane Chester Co. |
| 13RB4 | United States | Wisconsin | Dolomite | Byron |
| 14RA15 | United States | Iowa | Dolomite | Winterset |
| 14RA16 | United States | Iowa | Dolomite | Franklin |
| 13LA12 | United States | Ohio | Dolomite | Freemont |
| 14RA2 | United States | Illinois | Dolomite | Joilet |
| 11La1 | United States | Indiana | Dolomite | St. Paul |
| 11LA12 | United States | Missouri | Dolomite | Jefferson City |
| 13LA2 | United States | Illinois | Dolomite | Lemont |
| 14LA13 | United States | Ohio | Dolomite | Urbana |
| 11La17 | United States | Iowa | Dolomite | Lansing |
| 11RA3 | United States | Illinois | Dolomite | Lemont |
| 12RA16 | United States | Iowa | Dolomite | Farley |
| 14LA2 | United States | Illinois | Dolomite | Aurora |
| 14RB13 | United States | Ohio | Dolomite | Sandusky |
| 11LA2 | United States | Michigan | Dolomite | Raisinville |
| 11RB1 | United States | Illinois | Dolomite | Joilet |
| 14LA3 | United States | Illinois | Dolomite | Joilet |
| 14RB16 | United States | Iowa | Dolomite | Franklin |
| 11RB10 | United States | Kansas | Dolomite | Marysville |
| 12RA3 | United States | Illinois | Dolomite | Chicago |
| 13RB10 | United States | Ohio | Dolomite | Sandusky |
| 14RB17 | United States | Iowa | Dolomite | Quarry, Marshall Co. |
| 13RB12 | United States | Ohio | Dolomite | Greenfield |
| 12LA1 | United States | Indiana | Dolomite | Greensburgh |
| 13LB10 | United States | Ohio | Dolomite | Springfield |
| 13RB16 | United States | Iowa | Dolomite | Farley |
| 14LA5 | United States | Wisconsin | Dolomite | Eden |
| 12LA11 | United States | Ohio | Dolomite | Pt. Marblehead |
| 13LB14 | United States | Iowa | Dolomite | Delphi |
| 13RB2 | United States | Illinois | Dolomite | Joilet |
| 14LA6 | United States | Wisconsin | Dolomite | Taycheedah Twp. Fon du Lac Co. |
| 10RA9 | United States | Wisconsin | Dolomite | Byron |
| 11LB14 | United States | Missouri | Dolomite | Stoutland |
| 12LA15 | United States | Iowa | Dolomite | Marshalltown |
| 13LB2 | United States | Illinois | Dolomite | Lemont |
| 14LB1 | United States | Indiana | Dolomite | Montpelier |
| 14RB4 | United States | Illinois | Dolomite | Kankakee |
| 11LB2 | United States | Wisconsin | Dolomite | Fon du Lac |
| 12LA3 | United States | Illinois | Dolomite | Joilet |
| 13LB6 | United States | New York | Dolomite | Lockport |
| 14LB15 | United States | Iowa | Dolomite | Manchester |
| 8LA2 | Portugal | Marble | Ameixoira, Coimbra | |
| 11RA20 | United States | Texas | Marble | San Saba |
| 13RA25 | Cuba | Marble | Isle of Pines | |
| 2L10 | United States | Vermont | Marble | Florence |
| 2L12 | United States | Vermont | Marble | Florence |
| 2L2 | United States | Vermont | Marble | Florence |
| 8RA1 | Portugal | Marble | Ponde do Espinal, Coimbra | |
| 12RA29 | United States | Ohio | Marble | Spring Mills |
| 2L3 | United States | Vermont | Marble | Florence |
| 9La2 | United States | Tennessee | Marble | Morristown |
| 2L9 | United States | Vermont | Marble | Florence |
| 11LA24 | United States | Tennessee | Marble | Knoxville |
| 2R10 | United States | Vermont | Marble | Florence |
| 11LA7 | United States | Pennsylvania | Marble | Cedar Hollow Lime Co. |
| 2R12 | United States | Vermont | Marble | Florence |
| 2R2 | United States | Vermont | Marble | Florence |
| 2R3 | United States | Vermont | Marble | Florence |
| 2R9 | United States | Vermont | Marble | Florence |
| 13RB33 | United States | Utah | Marble | Payson |
| 4L9 | United States | Ohio | Sandstone | Berea |
| 6RA4 | United States | Pennsylvania | Sandstone | Connellsville |
| 8RA24 | United States | North Carolina | Sandstone | Durham |
| 9LB23 | United States | Ohio | Sandstone | Marietta |
| 7LA28 | United States | Kentucky | Sandstone | Grayson Spgs |
| 8RA36 | United States | Missouri | Sandstone | Nevada |
| 10RB32 | United States | Colorado | Sandstone | Fort Collins |
| 4R9 | United States | Ohio | Sandstone | Berea |
| 7LA31 | United States | Colorado | Sandstone | Fort Collins |
| 8LA30 | United States | New York | Sandstone | Lockport |
| 6LA20 | United States | Ohio | Sandstone | Newark |
| 8LA36 | United States | Missouri | Sandstone | Clinton |
| 8RB19 | United States | Pennsylvania | Sandstone | Corry |