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Stone description: dark gray
| Wall Number | Country | State Sort descending | Classification | Source |
|---|---|---|---|---|
| 6RB17 | United States | Pennsylvania | Gneiss | Philadelphia |
| 6RB19 | United States | Pennsylvania | Diabase | Reading |
| 14RA9 | United States | Pennsylvania | Limestone | Vanport |
| 14RB38 | United States | Pennsylvania | Marble | Pine Grove Schuylkill Co. |
| 7LB17 | United States | Pennsylvania | Gneiss | Chester |
| 10L51 | United States | Pennsylvania | Argillite (Slate) | Lynnport |
| 6LA18 | United States | Pennsylvania | Sandstone | Queens Run Clinton Co. |
| 6LB14 | United States | Pennsylvania | Diabase | Collins Station Lancaster Co. |
| 10LB18 | United States | Pennsylvania | Argillite (Slate) | Lynnport |
| 6LB18 | United States | Pennsylvania | Gneiss | Philadelphia |
| 6Lb19 | United States | Pennsylvania | Diabase | Jacksonwald |
| 10R51 | United States | Pennsylvania | Argillite (Slate) | Lynnport |
| 6LB4 | United States | Pennsylvania | Sandstone | Schickshinny Luzerne Co. |
| 13RB8 | United States | Pennsylvania | Limestone | Morrell |
| 9RA17 | United States | Pennsylvania | Argillite (Slate) | Lynnport |
| 6RA5 | United States | Pennsylvania | Sandstone | Mauch Chunk |
| 11LB7 | United States | Pennsylvania | Dolomite | Reading |
| 6RB10 | United States | Pennsylvania | Diabase | St. Peters |
| 6RB42 | United States | South Carolina | Granite | Batesburg |
| 6LA41 | United States | South Carolina | Granite | Aiken Co. |
| 5La40 | United States | South Carolina | Granite | Greenville |
| 14RA27 | United States | Tennessee | Limestone | Nashville |
| 12RB24 | United States | Tennessee | Limestone | Lebanon Pike |
| 12RB5 | United States | Tennessee | Limestone | Murfreesborough |
| 11LA39 | United States | Tennessee | Sandstone | Cater's Creek Davidson Co. |
| 13La1 | United States | Vermont | Limestone | Isle La Motte |
| 11RB30 | United States | Virginia | Schist | Farquier Co. |
| 11RB31 | United States | Virginia | Diabase | Leesburg |
| 11Lb36 | United States | Virginia | Diabase | Catlett's Station |
| 11LB38 | United States | Virginia | Granite | Fredericksburg |
| 8LA45 | United States | Washington | Sandstone | Olymphia |
| 8Lb40 | United States | West Virginia | Sandstone | Rowlesburgh |
| 14RA6 | United States | Wisconsin | Dolomite | Neenah |
| 10LA5 | United States | Wisconsin | Dolomite | Oshkosh |
| 10RB49 | United States | Wisconsin | Quartz | Marquette |
| 5RA29 | United States | California | Basalt | Petaluma |
| 5LA31 | United States | Colorado | Granite | Salida |
| 7LB33 | United States | Connecticut | Gneiss | Haddam |
| 1L1 | United States | Connecticut | Gneiss | Milford |
| 7RA11 | United States | Connecticut | Limestone | Shelterville |
| 5RB35 | United States | Connecticut | Diabase | New Haven |
| 6LA36 | United States | Connecticut | Gneiss | Greenwich |
| 5LA34 | United States | Connecticut | Gneiss | Middletown |
| 5La35 | United States | Connecticut | Gneiss | N. Bridgeport |
| 5RB46 | United States | Delaware | Gneiss | Wilmington |
| 4LB16 | United States | Delaware | Gneiss | Brandywine |