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Stone description: gray
| Wall Number | Country | State | Classification | Source Sort descending |
|---|---|---|---|---|
| 6C | United States | Indiana | Limestone | ? |
| 9LA15 | Siam (Thailand) | Marble | ? | |
| 7RB9 | Austria | Marble | Adnet | |
| 5LA39 | United States | South Carolina | Granite | Aiken Co. |
| 8LB24 | United States | North Carolina | Granite | Alamance Co. |
| 7LA21 | United States | North Carolina | Granite | Alamance Co. |
| 9Lb39 | United States | Oregon | Diabase | Albany region |
| 10RA39 | United States | New Hampshire | Granite | Allenstown |
| 6LB17 | United States | Pennsylvania | Granite | Allentown |
| 8LB1 | Portugal | Marble | Alvrite, Coimbra | |
| 8EE | United States | Ohio | Sandstone | Amherst |
| 11WE | United States | Ohio | Sandstone | Amherst |
| 10WE | United States | Ohio | Sandstone | Amherst |
| 4RQ | United States | Ohio | Sandstone | Amherst |
| 25WE | United States | Ohio | Sandstone | Amherst |
| S1-36 | United States | Ohio | Sandstone | Amherst |
| S1-37 | United States | Ohio | Sandstone | Amherst |
| 10EE | United States | Ohio | Sandstone | Amherst |
| 2RQ | United States | Ohio | Sandstone | Amherst |
| 6WE | United States | Ohio | Sandstone | Amherst |
| 7RA29 | United States | California | Sandstone | Angel Island |
| 6RB35 | United States | Connecticut | Gneiss | Ansonia |
| 6LB9 | United States | Pennsylvania | Sandstone | Baden |
| S2-47 | United States | Vermont | Granite | Barre |
| 32WE | United States | Arkansas | Limestone | Batesville |
| S3-10 | United States | Arkansas | Limestone | Batesville |
| 26EE | United States | Arkansas | Limestone | Batesville |
| S3-7 | United States | Arkansas | Limestone | Batesville |
| 10RB6 | United States | Missouri | Limestone | Bear Creek Marion Co. |
| 12EE | United States | Indiana | Limestone | Bedford |
| S2-4 | United States | Indiana | Limestone | Bedford |
| 15EE | United States | Indiana | Limestone | Bedford |
| 16EE | United States | Indiana | Limestone | Bedford |
| 16WE | United States | Indiana | Limestone | Bedford |
| S1-10 | United States | Indiana | Limestone | Bedford |
| 24WE | United States | Indiana | Limestone | Bedford |
| S3-1 | United States | Indiana | Limestone | Bedford |
| S1-8 | United States | Indiana | Limestone | Bedford |
| 28WE | United States | Indiana | Limestone | Bedford |
| S3-2 | United States | Indiana | Limestone | Bedford |
| S1-9 | United States | Indiana | Limestone | Bedford |
| 14C | United States | Indiana | Limestone | Bedford |
| S2-128 | United States | Indiana | Limestone | Bedford |
| 14EE | United States | Indiana | Limestone | Bedford |
| S2-130 | United States | Indiana | Limestone | Bedford |
| S3-8 | United States | Indiana | Limestone | Bedford |
| 8La11 | United States | Illinois | Limestone | Belknap |
| 5RB4 | United States | Ohio | Sandstone | Bellaire |
| 5RA3 | United States | Ohio | Sandstone | Bellaire |
| 11RB42 | United States | Washington | Sandstone | Bellingham |
| 11LB41 | United States | Washington | Sandstone | Bellingham |
| 8RA45 | United States | Washington | Sandstone | Bellingham |
| 8RA46 | United States | Washington | Sandstone | Bellingham |
| 13RA21 | United States | Iowa | Limestone | Bentonsport |
| 5RA26 | United States | Maine | Granite | Biddeford |
| 5RA27 | United States | Maine | Granite | Biddeford |
| 29WE | United States | Indiana | Limestone | Bloomington |
| 10C | United States | Indiana | Limestone | Bloomington |
| 30WE | United States | Indiana | Limestone | Bloomington |
| 31WE | United States | Indiana | Limestone | Bloomington |
| 10la10 | United States | Ohio | Limestone | Bloomville |
| 8RB31 | United States | Kentucky | Sandstone | Blue Lick Mountain |
| 14RB1 | United States | Indiana | Dolomite | Bluffton |
| 5RA36 | United States | Connecticut | Gneiss | Bolton |
| 6Lb37 | United States | Connecticut | Granite | Branchville |
| 9RA31 | United States | Connecticut | Gneiss | Branford |
| 5LB29 | United States | California | Basalt | Bridgeport |
| 6RA27 | United States | Maine | Granite | Brunswick |
| 6RB45 | United States | Vermont | Granite | Brunswick |
| 5RA4 | United States | Ohio | Sandstone | Buena Vista |
| 11LB30 | United States | Missouri | Sandstone | Butler |
| 7RA26 | United States | New York | Sandstone | Camden |
| 4L1 | Italy | Marble | Carrara | |
| 4R1 | Italy | Marble | Carrara | |
| 1L14 | Italy | Marble | Carrara | |
| 1R14 | Italy | Marble | Carrara | |
| 7RB36 | United States | Nevada | Sandstone | Carson City |
| 10RA49 | United States | Tennessee | Granite | Carter Co. S. E. part |
| S2-141 | United States | Missouri | Marble | Carthage |
| 3LQ | United States | Missouri | Limestone | Carthage |
| 14LB48 | United States | Missouri | Limestone | Carthage |
| 14RB48 | United States | Missouri | Limestone | Carthage |
| S2-5 | United States | Missouri | Limestone | Carthage |
| 1Lq | United States | Missouri | Limestone | Carthage |
| S3-12 | United States | Missouri | Limestone | Carthage |
| 8WE | United States | Missouri | Limestone | Carthage |
| 12LB16 | United States | Iowa | Dolomite | Cedar Falls |
| 6RB4 | United States | Pennsylvania | Sandstone | Center Bridge |
| 11La14 | United States | Iowa | Limestone | Charles City |
| 5LB39 | United States | South Carolina | Granite | Charleston |
| 8RA39 | United States | West Virginia | Sandstone | Charleston |
| 8LB26 | United States | North Carolina | Granite | Charlotte |
| 6LB24 | United States | North Carolina | Granite | Charlotte |
| 12RB30 | United States | New York | Marble | Chazy |
| 7Lb18 | United States | Pennsylvania | Gneiss | Chester |
| 13RB40 | United States | Illinois | Limestone | Chester |
| 6RA26 | United States | Maine | Granite | Chesterville |
| 14RB3 | United States | Illinois | Dolomite | Chicago |
| 8RA42 | United States | Oregon | Basalt | Clackamas Station Clackamas Co |
| 11LB43 | Canada | Sandstone | Cliffton, New Brunswick |