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Stone description: dark gray
| Wall Number | Country Sort ascending | State | Classification | Source |
|---|---|---|---|---|
| 13La46 | United States | Kentucky | Limestone | Livingstone |
| 6Lb19 | United States | Pennsylvania | Diabase | Jacksonwald |
| 10R51 | United States | Pennsylvania | Argillite (Slate) | Lynnport |
| 5LA34 | United States | Connecticut | Gneiss | Middletown |
| 8RA27 | United States | Maine | Schist | Knightsville |
| 13LB12 | United States | New Jersey | Dolomite | Newton |
| 6LB29 | United States | New York | Gneiss | Hastings |
| 5La35 | United States | Connecticut | Gneiss | N. Bridgeport |
| 8RA6 | United States | New York | Limestone | Sandy Hill |
| 13LB45 | United States | Kentucky | Limestone | Green Co. |
| 6LB4 | United States | Pennsylvania | Sandstone | Schickshinny Luzerne Co. |
| 10RB23 | United States | Massachusetts | Granite | Framingham |
| 5La40 | United States | South Carolina | Granite | Greenville |
| 6LB43 | United States | New Jersey | Diabase | Lambertville |
| 10RB42 | United States | Oregon | Basalt | Albany |
| 5LA43 | United States | New Hampshire | Gneiss | Sunapee |
| 8RB24 | United States | North Carolina | Granite | Oxford |
| 13RB42 | United States | Indiana | Limestone | Bedford |
| 6RA22 | United States | Massachusetts | Granite | W. Quincy |
| 10RB49 | United States | Wisconsin | Quartz | Marquette |
| 5LB19 | United States | Massachusetts | Granite | Leominister |
| 8RB38 | United States | Maryland | Gneiss | Ilchester |
| 13RB5 | United States | New York | Limestone | Kingston |
| 6RA25 | United States | Maine | Gneiss | Turner |
| 11LA39 | United States | Tennessee | Sandstone | Cater's Creek Davidson Co. |
| 5LB21 | United States | North Carolina | Gneiss | Henry's Station McDowel Co. |
| 8RB41 | United States | New Jersey | Sandstone | Danville |
| 13RB8 | United States | Pennsylvania | Limestone | Morrell |
| 6RA34 | United States | Minnesota | Granite | E. St. Cloud |
| 11LB15 | United States | Missouri | Dolomite | Sedalia |
| 5LB22 | United States | North Carolina | Gneiss | Alexander |
| 8RB42 | United States | Montana | Sandstone | Columbus |
| 14LB11 | United States | Ohio | Dolomite | Greenfield |
| 6RA40 | United States | Maryland | Gneiss | Ellicott City |
| 11Lb36 | United States | Virginia | Diabase | Catlett's Station |
| 5LB25 | United States | Maine | Diabase | Addison Point |
| 14LB14 | United States | Iowa | Dolomite | Osage Sta. |
| 6RA46 | United States | Michigan | Gneiss | Vulcan |
| 11LB38 | United States | Virginia | Granite | Fredericksburg |
| 5LB34 | United States | Minnesota | Gabbro | Duluth |
| 9RA17 | United States | Pennsylvania | Argillite (Slate) | Lynnport |
| 14RB35 | Spain | Limestone | Calatayud, Saragossa | |
| 13LA35 | Spain | Limestone | Ricla, Saragossa | |
| 9LA14 | Spain | Limestone | Murcia, Murcia | |
| 5RA37 | Mexico | Andesite | Hildalgo State | |
| 10rb16 | Argentina | Marble | Unkown |