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Stone description: gray
| Wall Number | Country | State Sort ascending | Classification | Source |
|---|---|---|---|---|
| 6LA37 | United States | Connecticut | Granite | Groton |
| 6RB35 | United States | Connecticut | Gneiss | Ansonia |
| 6RB36 | United States | Connecticut | Granite | Thomaston |
| 5RA35 | United States | Connecticut | Granite | W. Norfolk |
| 7RB33 | United States | Connecticut | Granite | Waterford |
| 5RA36 | United States | Connecticut | Gneiss | Bolton |
| 7RB34 | United States | Connecticut | Granite | W. Norfolk |
| 6LB36 | United States | Connecticut | Granite | E. Canaan |
| 6Lb37 | United States | Connecticut | Granite | Branchville |
| 5RB36 | United States | Connecticut | Granite | W. Norfolk |
| 5LB35 | United States | Connecticut | Gneiss | Lyme |
| 9RA31 | United States | Connecticut | Gneiss | Branford |
| 7Lb34 | United States | Connecticut | Gneiss | Sterling |
| 6RA35 | United States | Connecticut | Granite | Millstone Point |
| 6RA36 | United States | Connecticut | Gneiss | Gastonbury |
| 6rb32 | United States | Colorado | Granite | Georgetown |
| 5RA32 | United States | Colorado | Granite | Lawson |
| 7RA29 | United States | California | Sandstone | Angel Island |
| 5LA29 | United States | California | Granite | Rocklin |
| 7LA29 | United States | California | Sandstone | Livermore |
| S2-142 | United States | California | Marble | Columbia |
| S2-143 | United States | California | Marble | Columbia |
| 5LB28 | United States | California | Tuff | Cordelia |
| 5LB29 | United States | California | Basalt | Bridgeport |
| 7LB29 | United States | California | Sandstone | Livermore |
| 6RA47 | United States | Wisconsin | Quartzite | Waterloo |
| 7LA43 | United States | Wisconsin | Quartzite | Waterloo |
| 8LB39 | United States | West Virginia | Sandstone | Wheeling |
| 8RA39 | United States | West Virginia | Sandstone | Charleston |
| 11LB41 | United States | Washington | Sandstone | Bellingham |
| 8RA45 | United States | Washington | Sandstone | Bellingham |
| 8RA46 | United States | Washington | Sandstone | Bellingham |
| 11RB42 | United States | Washington | Sandstone | Bellingham |
| 9LB43 | United States | Washington | Sandstone | Tenino |
| 11LB37 | United States | Virginia | Granite | Manchester |
| 11LB39 | United States | Virginia | Granite | Manchester |
| 10RA34 | United States | Virginia | Granite | Tuckahoe Dist. |
| 11RB27 | United States | Virginia | Granite | Near Richmond |
| 10RB18 | United States | Virginia | Marble | Craigsville |
| S2-93 | United States | Vermont | Granite | Derby |
| 6RB45 | United States | Vermont | Granite | Brunswick |
| 5LA45 | United States | Vermont | Granite | Ryegate |
| 6RB47 | United States | Vermont | Granite | Ryegate |
| 10RA45 | United States | Vermont | Granite | Woodbury |
| S2-135 | United States | Vermont | Marble | Pittsford |
| 3L14 | United States | Vermont | Marble | W. Rutland |
| 4LA17 | United States | Vermont | Marble | W. Rutland |
| 12LB20 | United States | Vermont | Marble | W. Rutland |
| 4RA17 | United States | Vermont | Marble | W. Rutland |
| S2-47 | United States | Vermont | Granite | Barre |
| 12RB20 | United States | Vermont | Marble | W. Rutland |
| S1-17 | United States | Unknown | Granite | Unknown |
| S1-20 | United States | Unknown | Granite | Unknown |
| 8Lb32 | United States | Texas | Sandstone | Riverside |
| 6RB31 | United States | Texas | Granite | Nr. Llano |
| 5LA30 | United States | Texas | Granite | Nr. Llano |
| 10RB31 | United States | Texas | Sandstone | Mormon Mills |
| 7LQ | United States | Tennessee | Marble | Knoxville |
| 13LA27 | United States | Tennessee | Limestone | Nashville |
| 13LB27 | United States | Tennessee | Limestone | Cowan |
| 11Lq | United States | Tennessee | Marble | Knoxville |
| 11RA28 | United States | Tennessee | Limestone | Nashville |
| 11RA31 | United States | Tennessee | Marble | Knoxville |
| 10RA47 | United States | Tennessee | Syenite | Hiwasee copper mines |
| 10RA49 | United States | Tennessee | Granite | Carter Co. S. E. part |
| 14LB28 | United States | Tennessee | Limestone | Davidson Co. |
| S2-156 | United States | Tennessee | Marble | Knoxville |
| S2-157 | United States | Tennessee | Marble | Knoxville |
| S2-159 | United States | Tennessee | Marble | Knoxville |
| S2-160 | United States | Tennessee | Marble | Knoxville |
| 11LA27 | United States | Tennessee | Marble | Knoxville |
| S3-10 | United States | Arkansas | Limestone | Batesville |
| 26EE | United States | Arkansas | Limestone | Batesville |
| S3-7 | United States | Arkansas | Limestone | Batesville |
| 32WE | United States | Arkansas | Limestone | Batesville |
| 5LA39 | United States | South Carolina | Granite | Aiken Co. |
| 5RA40 | United States | South Carolina | Granite | Rion |
| 5RA41 | United States | South Carolina | Granite | Newberry Co. |
| 6LB41 | United States | South Carolina | Granite | Edgefield Co. |
| 5RB40 | United States | South Carolina | Granite | Columbia |
| 5LB39 | United States | South Carolina | Granite | Charleston |
| 5RB41 | United States | South Carolina | Granite | Fairfield Co. |
| 5LB40 | United States | South Carolina | Granite | Fairfield Co. |
| S1-11 | United States | Rhode Island | Granite | Westerly |
| 5RA46 | United States | Rhode Island | Granite | Niantic |
| 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 |
| 7RB17 | United States | Pennsylvania | Gneiss | Reading |
| 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 |