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Stone description: light gray
| Wall Number | Country | State | Classification Sort descending | Source |
|---|---|---|---|---|
| 9LB13 | United States | Iowa | Limestone | Burlington |
| 12LA32 | United States | Illinois | Limestone | Jonesborough |
| 13RB38 | United States | Illinois | Limestone | Sagetown |
| 14LB43 | United States | Nebraska | Limestone | LaPlatte |
| 8La17 | United States | Kentucky | Limestone | Russelville |
| 12LA35 | United States | Indiana | Limestone | Spencer |
| 12RB36 | United States | Indiana | Limestone | Bedford |
| 13RA20 | United States | Iowa | Limestone | Sigourney Station, Keokuk Co. |
| 13RB39 | United States | Illinois | Limestone | Columbia |
| 14Lb46 | United States | Kentucky | Limestone | Princeton |
| 4LB12 | United States | Indiana | Limestone | Salem |
| 10La21 | United States | Missouri | Limestone | Springfield |
| 12La36 | United States | Kentucky | Limestone | Bloomfield |
| 12RB40 | United States | Alabama | Limestone | Turks Cave |
| 13RA24 | United States | Kansas | Limestone | Douglass |
| 8RB15 | United States | Utah | Limestone | Ephriam |
| 6LA20 | United States | Ohio | Sandstone | Newark |
| 8LA36 | United States | Missouri | Sandstone | Clinton |
| 8RB19 | United States | Pennsylvania | Sandstone | Corry |
| 9RA39 | United States | Wyoming | Sandstone | Rawlins |
| 6RB20 | United States | Ohio | Sandstone | Amherst |
| 8La46 | United States | Washington | Sandstone | Wilkeson |
| 9RA42 | United States | Illinois | Sandstone | Xenia |
| 5LA18 | United States | Ohio | Sandstone | Plymouth |
| 6LA3 | United States | Pennsylvania | Sandstone | Wampum |
| 7RA31 | United States | Colorado | Sandstone | Coal Creek |
| 8Lb46 | United States | Washington | Sandstone | Pittsburgh |
| 5LA9 | United States | Ohio | Sandstone | Piketon |
| 6LA33 | United States | Colorado | Sandstone | Trinidad |
| 6RB28 | United States | New York | Sandstone | Canisteo |
| 7RA44 | United States | New Mexico | Sandstone | Las Vegas |
| 10Lb46 | United States | Wisconsin | Sandstone | Mauston |
| 8r48 | United States | Ohio | Sandstone | Berea |
| 9RB21 | United States | Ohio | Sandstone | Berea |
| 6LB13 | United States | Pennsylvania | Sandstone | Beaver Falls |
| 6RB39 | United States | Ohio | Sandstone | Sunbury |
| 9LA18 | United States | Pennsylvania | Sandstone | Antrim |
| 6LB20 | United States | Ohio | Sandstone | Sunbury |
| 9RB39 | United States | Indiana | Sandstone | Paoli |
| 6LB42 | United States | New Jersey | Sandstone | Stockton |
| 9LA39 | United States | Indiana | Sandstone | French Lick Twp. |
| 9RB40 | United States | Indiana | Sandstone | Attica |
| 9LA41 | United States | Illinois | Sandstone | Chester |
| 5RA15 | United States | Ohio | Sandstone | Cambridge |
| 6RA10 | United States | Pennsylvania | Sandstone | Johnstown |
| 6RB7 | United States | Pennsylvania | Sandstone | Cannonsburgh |
| 8L48 | United States | Ohio | Sandstone | Berea |
| 6RA11 | United States | Pennsylvania | Sandstone | Layton Station Fayette Co. |
| 6RQ | United States | Ohio | Sandstone | McDermont |
| 5RB2 | United States | Ohio | Sandstone | Canal Dover Tuscarawas Co. |
| 11LB45 | United States | Kentucky | Sandstone | Whitney Co. |
| 6RA20 | United States | Ohio | Sandstone | Lancaster |
| 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 |
| 10RB32 | United States | Colorado | Sandstone | Fort Collins |
| 7LA28 | United States | Kentucky | Sandstone | Grayson Spgs |
| 8RA36 | United States | Missouri | Sandstone | Nevada |
| 4R9 | United States | Ohio | Sandstone | Berea |
| 7LA31 | United States | Colorado | Sandstone | Fort Collins |
| 8LA30 | United States | New York | Sandstone | Lockport |
| 13RA25 | Cuba | Marble | Isle of Pines | |
| 2L10 | United States | Vermont | Marble | Florence |
| 2L12 | United States | Vermont | Marble | Florence |
| 12RA29 | United States | Ohio | Marble | Spring Mills |
| 2L2 | United States | Vermont | Marble | Florence |
| 8RA1 | Portugal | Marble | Ponde do Espinal, Coimbra | |
| 2L3 | United States | Vermont | Marble | Florence |
| 9La2 | United States | Tennessee | Marble | Morristown |
| 11LA24 | United States | Tennessee | Marble | Knoxville |
| 2L9 | United States | Vermont | Marble | Florence |
| 11LA7 | United States | Pennsylvania | Marble | Cedar Hollow Lime Co. |
| 2R10 | United States | Vermont | Marble | Florence |
| 2R12 | United States | Vermont | Marble | Florence |
| 2R2 | United States | Vermont | Marble | Florence |
| 2R3 | United States | Vermont | Marble | Florence |
| 13RB33 | United States | Utah | Marble | Payson |
| 2R9 | United States | Vermont | Marble | Florence |
| 8LA2 | Portugal | Marble | Ameixoira, Coimbra | |
| 11RA20 | United States | Texas | Marble | San Saba |
| 14RA15 | United States | Iowa | Dolomite | Winterset |
| 13LA12 | United States | Ohio | Dolomite | Freemont |
| 14RA16 | United States | Iowa | Dolomite | Franklin |
| 11La1 | United States | Indiana | Dolomite | St. Paul |
| 14RA2 | United States | Illinois | Dolomite | Joilet |
| 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 |
| 11LA2 | United States | Michigan | Dolomite | Raisinville |
| 11RB1 | United States | Illinois | Dolomite | Joilet |
| 14LA3 | United States | Illinois | Dolomite | Joilet |
| 14RB13 | United States | Ohio | Dolomite | Sandusky |
| 11RB10 | United States | Kansas | Dolomite | Marysville |
| 12RA3 | United States | Illinois | Dolomite | Chicago |
| 13RB10 | United States | Ohio | Dolomite | Sandusky |