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Stone description: gray
| Wall Number | Country | State | Classification Sort descending | Source |
|---|---|---|---|---|
| S3-8 | United States | Indiana | Limestone | Bedford |
| 5La8 | United States | Ohio | Sandstone | Youngstown |
| 5RB8 | United States | Ohio | Sandstone | Independence |
| 6WE | United States | Ohio | Sandstone | Amherst |
| 8LB21 | United States | Ohio | Sandstone | Steubensville Jefferson Co. |
| 5LA10 | United States | Ohio | Sandstone | Sunbury |
| 5LB1 | United States | Ohio | Sandstone | N. Hampton |
| 5RA4 | United States | Ohio | Sandstone | Buena Vista |
| 5RQ | United States | Ohio | Sandstone | Kipton |
| 7RB36 | United States | Nevada | Sandstone | Carson City |
| 11RB33 | United States | Oregon | Sandstone | Jacksonville |
| 5LA13 | United States | Ohio | Sandstone | New Lisbon |
| 5LB5 | United States | Ohio | Sandstone | Newburgh |
| 9LA30 | United States | New York | Sandstone | W. Liberty |
| S1-1 | United States | Ohio | Sandstone | McDermott |
| S2-7 | United States | Ohio | Sandstone | McDermott |
| 10Lb36 | United States | Kansas | Sandstone | Pawnee |
| 11LB25 | Italy | Sandstone | Leghorn | |
| 5LA14 | United States | Ohio | Sandstone | Columbus |
| 5LB7 | United States | Ohio | Sandstone | N. Bloomfield |
| 6EE | United States | Ohio | Sandstone | McDermott |
| 8Lb32 | United States | Texas | Sandstone | Riverside |
| 10RB22 | United States | Ohio | Sandstone | Warren |
| 11LB30 | United States | Missouri | Sandstone | Butler |
| 11RB42 | United States | Washington | Sandstone | Bellingham |
| 5LA16 | United States | Ohio | Sandstone | Windsor |
| 5RA11 | United States | Ohio | Sandstone | Lithopolis |
| 7LA29 | United States | California | Sandstone | Livermore |
| 7RA20 | United States | Ohio | Sandstone | Elyria |
| 7RQ | United States | Ohio | Sandstone | Kipton |
| 8LB39 | United States | West Virginia | Sandstone | Wheeling |
| 11LB31 | United States | Kansas | Sandstone | Pawnee |
| 5RA12 | United States | Ohio | Sandstone | Euclid |
| 5RA8 | United States | Ohio | Sandstone | Greenfield |
| 9LB36 | United States | Alabama | Sandstone | Greensport |
| 11WE | United States | Ohio | Sandstone | Amherst |
| 5RA13 | United States | Ohio | Sandstone | Marietta |
| 6LA28 | United States | New York | Sandstone | Olean |
| 6LB39 | United States | Ohio | Sandstone | Youngstown |
| 6RB2 | United States | Pennsylvania | Sandstone | Franklin |
| 7RA26 | United States | New York | Sandstone | Camden |
| 8EE | United States | Ohio | Sandstone | Amherst |
| 9Lb37 | United States | Oregon | Sandstone | Forest Grove |
| S1-2 | United States | Ohio | Sandstone | McDermott |
| 10RB31 | United States | Texas | Sandstone | Mormon Mills |
| 5LB2 | United States | Ohio | Sandstone | Newburgh |
| 5RA16 | United States | Ohio | Sandstone | Leesville |
| 6La30 | United States | Kentucky | Sandstone | Livingstone |
| 7RA29 | United States | California | Sandstone | Angel Island |
| 11LB41 | United States | Washington | Sandstone | Bellingham |
| 25WE | United States | Ohio | Sandstone | Amherst |
| 6RB3 | United States | Pennsylvania | Sandstone | Kiasola Station Beaver Co. |
| 7RA32 | United States | Minnesota | Sandstone | Dresback |
| 8RA39 | United States | West Virginia | Sandstone | Charleston |
| 9LB43 | United States | Washington | Sandstone | Tenino |
| 10RA31 | United States | Kansas | Sandstone | Parsons |
| 5LA3 | United States | Ohio | Sandstone | Peninsula |
| 6LA5 | United States | Pennsylvania | Sandstone | Scranton |
| S1-36 | United States | Ohio | Sandstone | Amherst |
| S3-11 | United States | Ohio | Sandstone | McDermott |
| 11LB43 | Canada | Sandstone | Cliffton, New Brunswick | |
| 28EE | United States | Ohio | Sandstone | McDermott |
| 6LB6 | United States | Pennsylvania | Sandstone | Prospect |
| 8LA21 | United States | Ohio | Sandstone | Steubensville Jefferson Co. |
| 8RA45 | United States | Washington | Sandstone | Bellingham |
| S1-37 | United States | Ohio | Sandstone | Amherst |
| 13RA22 | United States | Missouri | Sandstone | Miami Station Carroll Co. |
| 6LB9 | United States | Pennsylvania | Sandstone | Baden |
| 8RA46 | United States | Washington | Sandstone | Bellingham |
| 10WE | United States | Ohio | Sandstone | Amherst |
| 5LA4 | United States | Ohio | Sandstone | Norwalk |
| 5RB4 | United States | Ohio | Sandstone | Bellaire |
| 6LB2 | United States | Pennsylvania | Sandstone | Mauch Chunk |
| 6RA12 | United States | Pennsylvania | Sandstone | Lucesco |
| 7LB28 | United States | Kentucky | Sandstone | Taylor Co. |
| 8LA37 | United States | Missouri | Sandstone | Warrensburg |
| 10Lb19 | United States | Pennsylvania | Sandstone | Stoop's Ferry |
| 5RA3 | United States | Ohio | Sandstone | Bellaire |
| 6LB21 | United States | Ohio | Sandstone | Millersburg |
| 6RA17 | United States | Pennsylvania | Sandstone | Greensburgh |
| 6RB4 | United States | Pennsylvania | Sandstone | Center Bridge |
| 7LB29 | United States | California | Sandstone | Livermore |
| S3-6 | United States | Ohio | Sandstone | McDermott |
| 8RB31 | United States | Kentucky | Sandstone | Blue Lick Mountain |
| 9RA32 | Italy | Sandstone | Leghorn | |
| 10EE | United States | Ohio | Sandstone | Amherst |
| 2RQ | United States | Ohio | Sandstone | Amherst |
| 4RQ | United States | Ohio | Sandstone | Amherst |
| 5LA7 | United States | Ohio | Sandstone | Millersburg |
| 5RB6 | United States | Ohio | Sandstone | Cumberland |
| 11LA27 | United States | Tennessee | Marble | Knoxville |
| 12RB30 | United States | New York | Marble | Chazy |
| 9LA15 | Siam (Thailand) | Marble | ? | |
| S2-133 | United States | Montana | Marble | Gardner |
| 11LA29 | Italy | Marble | Serravezza | |
| S2-135 | United States | Vermont | Marble | Pittsford |
| 10LA17 | Australia | Marble | South Australia | |
| 14LA32 | Austria | Marble | Trent | |
| S2-139 | United States | New York | Marble | Plattsburg |
| 10RB18 | United States | Virginia | Marble | Craigsville |