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Stone description: gray
| Wall Number | Country | State Sort descending | Classification | Source |
|---|---|---|---|---|
| 10RA10 | United States | New York | Limestone | Prescott |
| 13LB38 | United States | New York | Marble | Port Henry |
| 6LA28 | United States | New York | Sandstone | Olean |
| 7RA26 | United States | New York | Sandstone | Camden |
| 13RB35 | United States | New York | Limestone | Williamsville |
| 7LA21 | United States | North Carolina | Granite | Alamance Co. |
| 5RB21 | United States | North Carolina | Granite | Toisnot |
| 5RB22 | United States | North Carolina | Granite | Mt. Monroe |
| 5RB23 | United States | North Carolina | Granite | Mooresville |
| 5LB20 | United States | North Carolina | Gneiss | Jamestown |
| 5LB23 | United States | North Carolina | Granite | Davidson College |
| 5RB38 | United States | North Carolina | Granite | Winston |
| 7LB22 | United States | North Carolina | Gneiss | Shelby |
| S2-162 | United States | North Carolina | Marble | Murphy |
| 10LB27 | United States | North Carolina | Granite | Louisburg |
| 8LB24 | United States | North Carolina | Granite | Alamance Co. |
| 6RA38 | United States | North Carolina | Granite | Gaston Co. |
| 8LB26 | United States | North Carolina | Granite | Charlotte |
| 5LA21 | United States | North Carolina | Gneiss | Greensborough |
| 7RA23 | United States | North Carolina | Granite | Gastonia |
| 11LB42 | United States | North Carolina | Gneiss | Hickory |
| 5RA22 | United States | North Carolina | Granite | Poison Springs |
| 5RA25 | United States | North Carolina | Granite | Mecklenburg Co. |
| 8RB23 | United States | North Carolina | Granite | Greensborough |
| 8RB25 | United States | North Carolina | Granite | Lexington |
| 6LB24 | United States | North Carolina | Granite | Charlotte |
| 10la10 | United States | Ohio | Limestone | Bloomville |
| 6WE | United States | Ohio | Sandstone | Amherst |
| 5La8 | United States | Ohio | Sandstone | Youngstown |
| 5RA4 | United States | Ohio | Sandstone | Buena Vista |
| 5LB1 | United States | Ohio | Sandstone | N. Hampton |
| 10RB22 | United States | Ohio | Sandstone | Warren |
| 7RQ | United States | Ohio | Sandstone | Kipton |
| 5RA8 | United States | Ohio | Sandstone | Greenfield |
| 11WE | United States | Ohio | Sandstone | Amherst |
| 6LB39 | United States | Ohio | Sandstone | Youngstown |
| 8EE | United States | Ohio | Sandstone | Amherst |
| 5LB2 | United States | Ohio | Sandstone | Newburgh |
| 8LA21 | United States | Ohio | Sandstone | Steubensville Jefferson Co. |
| 5RB4 | United States | Ohio | Sandstone | Bellaire |
| 10WE | United States | Ohio | Sandstone | Amherst |
| 4RQ | United States | Ohio | Sandstone | Amherst |
| 5RB6 | United States | Ohio | Sandstone | Cumberland |
| 8LB21 | United States | Ohio | Sandstone | Steubensville Jefferson Co. |
| 5RB8 | United States | Ohio | Sandstone | Independence |
| 5LA10 | United States | Ohio | Sandstone | Sunbury |
| 5RQ | United States | Ohio | Sandstone | Kipton |
| 5LB5 | United States | Ohio | Sandstone | Newburgh |
| S2-7 | United States | Ohio | Sandstone | McDermott |
| 5LA13 | United States | Ohio | Sandstone | New Lisbon |
| S1-1 | United States | Ohio | Sandstone | McDermott |
| 5LB7 | United States | Ohio | Sandstone | N. Bloomfield |
| 5LA14 | United States | Ohio | Sandstone | Columbus |
| 6EE | United States | Ohio | Sandstone | McDermott |
| 5RA11 | United States | Ohio | Sandstone | Lithopolis |
| 5LA16 | United States | Ohio | Sandstone | Windsor |
| 7RA20 | United States | Ohio | Sandstone | Elyria |
| 5RA12 | United States | Ohio | Sandstone | Euclid |
| 5RA13 | United States | Ohio | Sandstone | Marietta |
| S1-2 | United States | Ohio | Sandstone | McDermott |
| 5RA16 | United States | Ohio | Sandstone | Leesville |
| 10RA13 | United States | Ohio | Dolomite | White House |
| 25WE | United States | Ohio | Sandstone | Amherst |
| 10RA15 | United States | Ohio | Dolomite | White House |
| 13LB9 | United States | Ohio | Dolomite | Sandusky |
| S3-11 | United States | Ohio | Sandstone | McDermott |
| 5LA3 | United States | Ohio | Sandstone | Peninsula |
| S1-36 | United States | Ohio | Sandstone | Amherst |
| 28EE | United States | Ohio | Sandstone | McDermott |
| S1-37 | United States | Ohio | Sandstone | Amherst |
| 11RA10 | United States | Ohio | Dolomite | Milton Twp. Woods Co. |
| 5LA4 | United States | Ohio | Sandstone | Norwalk |
| 5RA3 | United States | Ohio | Sandstone | Bellaire |
| S3-6 | United States | Ohio | Sandstone | McDermott |
| 6LB21 | United States | Ohio | Sandstone | Millersburg |
| 10EE | United States | Ohio | Sandstone | Amherst |
| 2RQ | United States | Ohio | Sandstone | Amherst |
| 5LA7 | United States | Ohio | Sandstone | Millersburg |
| 11RB33 | United States | Oregon | Sandstone | Jacksonville |
| 9Lb37 | United States | Oregon | Sandstone | Forest Grove |
| 9Lb39 | United States | Oregon | Diabase | Albany region |
| 8RA42 | United States | Oregon | Basalt | Clackamas Station Clackamas Co |
| 11RA8 | United States | Pennsylvania | Limestone | Cove Statioan Bedford Co. |
| 7Lb18 | United States | Pennsylvania | Gneiss | Chester |
| 8La19 | United States | Pennsylvania | Diabase | Goldsboro |
| 6LB6 | United States | Pennsylvania | Sandstone | Prospect |
| 6LB9 | United States | Pennsylvania | Sandstone | Baden |
| 10LB17 | United States | Pennsylvania | Soapstone | Montgomery Co. |
| 6RA12 | United States | Pennsylvania | Sandstone | Lucesco |
| 6RA17 | United States | Pennsylvania | Sandstone | Greensburgh |
| 10Lb19 | United States | Pennsylvania | Sandstone | Stoop's Ferry |
| 6RB16 | United States | Pennsylvania | Diabase | Round Top Gettysburg |
| 6RB2 | United States | Pennsylvania | Sandstone | Franklin |
| 6RB3 | United States | Pennsylvania | Sandstone | Kiasola Station Beaver Co. |
| 6LA5 | United States | Pennsylvania | Sandstone | Scranton |
| 6LB16 | United States | Pennsylvania | Diabase | Gettysburg |
| 6LB17 | United States | Pennsylvania | Granite | Allentown |
| 6LB2 | United States | Pennsylvania | Sandstone | Mauch Chunk |
| 7RB16 | United States | Pennsylvania | Soapstone | Montgomery Co. |
| 6RB4 | United States | Pennsylvania | Sandstone | Center Bridge |