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Stone description: gray
| Wall Number | Country Sort ascending | State | Classification | Source |
|---|---|---|---|---|
| 11LB43 | Canada | Sandstone | Cliffton, New Brunswick | |
| 1L6 | Canada | Granite | Halifax Co. | |
| 14LA32 | Austria | Marble | Trent | |
| 7RB9 | Austria | Marble | Adnet | |
| 7LB11 | Austria | Marble | Nabresina | |
| 14RA31 | Austria | Marble | Karst | |
| 5LB26 | Austria | Granite | Neuhaus | |
| 10LA17 | Australia | Marble | South Australia | |
| 3l10 | Australia | Marble | New South Wales | |
| 3R10 | Australia | Marble | New South Wales | |
| 28EE | United States | Ohio | Sandstone | McDermott |
| 5RA25 | United States | North Carolina | Granite | Mecklenburg Co. |
| 6rb32 | United States | Colorado | Granite | Georgetown |
| 8RA45 | United States | Washington | Sandstone | Bellingham |
| S3-12 | United States | Missouri | Limestone | Carthage |
| 10RA34 | United States | Virginia | Granite | Tuckahoe Dist. |
| 13RA21 | United States | Iowa | Limestone | Bentonsport |
| 5LA30 | United States | Texas | Granite | Nr. Llano |
| 6LB16 | United States | Pennsylvania | Diabase | Gettysburg |
| 7RA40 | United States | Montana | Diorite | Helena |
| S1-37 | United States | Ohio | Sandstone | Amherst |
| 11Lq | United States | Tennessee | Marble | Knoxville |
| 28WE | United States | Indiana | Limestone | Bedford |
| 5RA26 | United States | Maine | Granite | Biddeford |
| 6RB35 | United States | Connecticut | Gneiss | Ansonia |
| 8RA46 | United States | Washington | Sandstone | Bellingham |
| S3-2 | United States | Indiana | Limestone | Bedford |
| 10RA36 | United States | New Hampshire | Granite | Fitzwilliams |
| 13RA22 | United States | Missouri | Sandstone | Miami Station Carroll Co. |
| 5LA39 | United States | South Carolina | Granite | Aiken Co. |
| 6LB17 | United States | Pennsylvania | Granite | Allentown |
| 7RA41 | United States | New Hampshire | Granite | Sunapee |
| S1-8 | United States | Indiana | Limestone | Bedford |
| 11RA10 | United States | Ohio | Dolomite | Milton Twp. Woods Co. |
| 29WE | United States | Indiana | Limestone | Bloomington |
| 5RA27 | United States | Maine | Granite | Biddeford |
| 6RB36 | United States | Connecticut | Granite | Thomaston |
| 8RB23 | United States | North Carolina | Granite | Greensborough |
| S3-4 | United States | Alabama | Marble | Rockwood |
| 10RA38 | United States | New Hampshire | Granite | Fitzwilliams |
| 13RB35 | United States | New York | Limestone | Williamsville |
| 5LA4 | United States | Ohio | Sandstone | Norwalk |
| 6LB2 | United States | Pennsylvania | Sandstone | Mauch Chunk |
| 7RB16 | United States | Pennsylvania | Soapstone | Montgomery Co. |
| S1-9 | United States | Indiana | Limestone | Bedford |
| 11RA28 | United States | Tennessee | Limestone | Nashville |
| 2L17 | United States | Missouri | Limestone | Phenix |
| 5RA3 | United States | Ohio | Sandstone | Bellaire |
| 6RB4 | United States | Pennsylvania | Sandstone | Center Bridge |
| 8RB25 | United States | North Carolina | Granite | Lexington |
| S3-6 | United States | Ohio | Sandstone | McDermott |
| 10RA39 | United States | New Hampshire | Granite | Allenstown |
| 13RB40 | United States | Illinois | Limestone | Chester |
| 5LA42 | United States | New Jersey | Diabase | Rock Church |
| 6LB21 | United States | Ohio | Sandstone | Millersburg |
| 7RB17 | United States | Pennsylvania | Gneiss | Reading |
| S2-125 | United States | Kansas | Limestone | Cottonwood |
| 10C | United States | Indiana | Limestone | Bloomington |
| 11RA31 | United States | Tennessee | Marble | Knoxville |
| 2R17 | United States | Missouri | Limestone | Phenix |
| 5RA32 | United States | Colorado | Granite | Lawson |
| 6RB45 | United States | Vermont | Granite | Brunswick |
| 8RB31 | United States | Kentucky | Sandstone | Blue Lick Mountain |
| S3-7 | United States | Arkansas | Limestone | Batesville |
| 10RA41 | United States | New Hampshire | Granite | Farmington |
| 14C | United States | Indiana | Limestone | Bedford |
| 5LA45 | United States | Vermont | Granite | Ryegate |
| 6LB22 | United States | Massachusetts | Gneiss | W. Andover |
| 7RB23 | United States | Maine | Gneiss | Jefferson |
| S2-128 | United States | Indiana | Limestone | Bedford |
| 10EE | United States | Ohio | Sandstone | Amherst |
| 2RQ | United States | Ohio | Sandstone | Amherst |
| 5RA35 | United States | Connecticut | Granite | W. Norfolk |
| 6RB47 | United States | Vermont | Granite | Ryegate |
| 8WE | United States | Missouri | Limestone | Carthage |
| S3-8 | United States | Indiana | Limestone | Bedford |
| 10RA44 | United States | New Jersey | Diabase | W. New York |
| 14EE | United States | Indiana | Limestone | Bedford |
| 5LA7 | United States | Ohio | Sandstone | Millersburg |
| 6LB24 | United States | North Carolina | Granite | Charlotte |
| 7RB33 | United States | Connecticut | Granite | Waterford |
| S2-130 | United States | Indiana | Limestone | Bedford |
| 10la10 | United States | Ohio | Limestone | Bloomville |
| 11RA8 | United States | Pennsylvania | Limestone | Cove Statioan Bedford Co. |
| 30WE | United States | Indiana | Limestone | Bloomington |
| 5RA36 | United States | Connecticut | Gneiss | Bolton |
| 6WE | United States | Ohio | Sandstone | Amherst |
| 10RA45 | United States | Vermont | Granite | Woodbury |
| 14L49 | United States | Missouri | Limestone | Phenix |
| 5La8 | United States | Ohio | Sandstone | Youngstown |
| 6LB25 | United States | Maine | Granite | Williamantic |
| 7RB34 | United States | Connecticut | Granite | W. Norfolk |
| S2-133 | United States | Montana | Marble | Gardner |
| 10LA13 | United States | Maryland | Dolomite | Findlay |
| 11RB27 | United States | Virginia | Granite | Near Richmond |
| 31WE | United States | Indiana | Limestone | Bloomington |
| 5RA4 | United States | Ohio | Sandstone | Buena Vista |
| 7LA21 | United States | North Carolina | Granite | Alamance Co. |
| 9La23 | United States | Massachusetts | Granite | Peabody |
| 10RA47 | United States | Tennessee | Syenite | Hiwasee copper mines |