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Stone description: dark gray
| Wall Number | Country Sort descending | State | Classification | Source |
|---|---|---|---|---|
| 10rb16 | Argentina | Marble | Unkown | |
| 5RA37 | Mexico | Andesite | Hildalgo State | |
| 14RB35 | Spain | Limestone | Calatayud, Saragossa | |
| 13LA35 | Spain | Limestone | Ricla, Saragossa | |
| 9LA14 | Spain | Limestone | Murcia, Murcia | |
| 11RA22 | United States | Missouri | Limestone | Neosho |
| 5RA29 | United States | California | Basalt | Petaluma |
| 14RA21 | United States | Iowa | Limestone | Washington |
| 6RB17 | United States | Pennsylvania | Gneiss | Philadelphia |
| 6RB19 | United States | Pennsylvania | Diabase | Reading |
| 11RA6 | United States | New York | Limestone | Buffalo |
| 5RA31 | United States | Georgia | Gneiss | Atlanta |
| 14RA27 | United States | Tennessee | Limestone | Nashville |
| 14RA3 | United States | Illinois | Dolomite | Saline |
| 6RB22 | United States | Massachusetts | Granite | Rockport |
| 11RB14 | United States | Missouri | Dolomite | Hermann |
| 14RA6 | United States | Wisconsin | Dolomite | Neenah |
| 6RB26 | United States | Maine | Granite | Bryant's Pond |
| 11RB30 | United States | Virginia | Schist | Farquier Co. |
| 5RA43 | United States | New Jersey | Diabase | Weehawken |
| 14RA9 | United States | Pennsylvania | Limestone | Vanport |
| 6RB42 | United States | South Carolina | Granite | Batesburg |
| 11RB31 | United States | Virginia | Diabase | Leesburg |
| 5RB12 | United States | Massachusetts | Granite | Quincy |
| 6RB43 | United States | New Jersey | Diabase | Rocky Hill |
| 12LA22 | United States | Missouri | Limestone | Pleasant Hill |
| 5RB13 | United States | Massachusetts | Granite | Quincy |
| 14RB38 | United States | Pennsylvania | Marble | Pine Grove Schuylkill Co. |
| 7LB17 | United States | Pennsylvania | Gneiss | Chester |
| 12LA7 | United States | New York | Limestone | Canajoharie |
| 5RB14 | United States | Massachusetts | Granite | Quincy |
| 14RB46 | United States | Kentucky | Limestone | Stewart's Mill Clark Co. |
| 7LB27 | United States | New York | Sandstone | Phoenicia |
| 12LB13 | United States | Montana | Marble | Helena |
| 5RB16 | United States | Massachusetts | Diabase | E. Longmeadow |
| 14RB47 | United States | Kentucky | Limestone | Bloomfield |
| 7LB33 | United States | Connecticut | Gneiss | Haddam |
| 12LB7 | United States | New York | Limestone | Le Roy |
| 5RB17 | United States | Massachusetts | Granite | Quincy |
| 1L1 | United States | Connecticut | Gneiss | Milford |
| 7RA11 | United States | Connecticut | Limestone | Shelterville |
| 12RA12 | United States | Ohio | Dolomite | Lexington |
| 5RB18 | United States | Massachusetts | Granite | Quincy |
| 1L7 | United States | Massachusetts | Granite | Quincy |
| 7RA25 | United States | Maine | Granite | Canaan |
| 12RA17 | United States | Iowa | Dolomite | Garrison |
| 5RB19 | United States | Massachusetts | Granite | Quincy |
| 1L8 | United States | Massachusetts | Granite | Quincy |
| 8LA23 | United States | Massachusetts | Diabase | Medford |
| 12RB13 | United States | Ohio | Dolomite | Holmes Twp. Crawford C. |
| 5RB20 | United States | Massachusetts | Granite | Quincy |
| 1L9 | United States | Massachusetts | Granite | Quincy |
| 8LA27 | United States | Maine | Diabase | Addison Point |
| 12RB17 | United States | Iowa | Dolomite | Garrison |
| 5RB27 | United States | Maine | Diabase | Addison |
| 1R7 | United States | Massachusetts | Granite | Quincy |
| 8LA39 | United States | Kansas | Sandstone | Oswego |
| 12RB23 | United States | Kansas | Limestone | Oswego |
| 5RB35 | United States | Connecticut | Diabase | New Haven |
| 10L51 | United States | Pennsylvania | Argillite (Slate) | Lynnport |
| 1R8 | United States | Massachusetts | Granite | Quincy |
| 8LA43 | United States | Montana | Sandstone | Columbus |
| 12RB24 | United States | Tennessee | Limestone | Lebanon Pike |
| 5RB46 | United States | Delaware | Gneiss | Wilmington |
| 10LA30 | United States | Maine | Diabase | Vinal Haven |
| 1R9 | United States | Massachusetts | Granite | Quincy |
| 8LA45 | United States | Washington | Sandstone | Olymphia |
| 12RB4 | United States | Illinois | Limestone | Breese |
| 6LA18 | United States | Pennsylvania | Sandstone | Queens Run Clinton Co. |
| 10LA42 | United States | New Jersey | Diabase | Jersey City |
| 4LB16 | United States | Delaware | Gneiss | Brandywine |
| 12RB5 | United States | Tennessee | Limestone | Murfreesborough |
| 6LA36 | United States | Connecticut | Gneiss | Greenwich |
| 10LA5 | United States | Wisconsin | Dolomite | Oshkosh |
| 5LA23 | United States | North Carolina | Granite | Davidson College |
| 8LB27 | United States | Maine | Granite | St. George |
| 12RQ | United States | New York | Sandstone | South Unadilla |
| 6LA39 | United States | Massachusetts | Gneiss | Monson |
| 10LA7 | United States | New York | Limestone | Onondaga |
| 8Lb40 | United States | West Virginia | Sandstone | Rowlesburgh |
| 13La1 | United States | Vermont | Limestone | Isle La Motte |
| 6LA41 | United States | South Carolina | Granite | Aiken Co. |
| 10LB18 | United States | Pennsylvania | Argillite (Slate) | Lynnport |
| 5LA31 | United States | Colorado | Granite | Salida |
| 8Lb8 | United States | Ohio | Limestone | Hamilton |
| 6LB14 | United States | Pennsylvania | Diabase | Collins Station Lancaster Co. |
| 10LB23 | United States | Massachusetts | Gneiss | Becket |
| 5LA33 | United States | Minnesota | Diabase | Duluth |
| 8RA18 | United States | Kentucky | Limestone | Lebanon |
| 13LA43 | United States | Kentucky | Limestone | Grahampton |
| 6LB18 | United States | Pennsylvania | Gneiss | Philadelphia |
| 10R51 | United States | Pennsylvania | Argillite (Slate) | Lynnport |
| 5LA34 | United States | Connecticut | Gneiss | Middletown |
| 8RA27 | United States | Maine | Schist | Knightsville |
| 13La46 | United States | Kentucky | Limestone | Livingstone |
| 6Lb19 | United States | Pennsylvania | Diabase | Jacksonwald |
| 5La35 | United States | Connecticut | Gneiss | N. Bridgeport |
| 8RA6 | United States | New York | Limestone | Sandy Hill |
| 13LB12 | United States | New Jersey | Dolomite | Newton |
| 6LB29 | United States | New York | Gneiss | Hastings |