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Stone description: gray
| Wall Number Sort descending | Country | State | Classification | Source |
|---|---|---|---|---|
| 5RB21 | United States | North Carolina | Granite | Toisnot |
| 5RB22 | United States | North Carolina | Granite | Mt. Monroe |
| 5RB23 | United States | North Carolina | Granite | Mooresville |
| 5RB36 | United States | Connecticut | Granite | W. Norfolk |
| 5RB38 | United States | North Carolina | Granite | Winston |
| 5RB39 | United States | Maryland | Granite | Montrose |
| 5RB4 | United States | Ohio | Sandstone | Bellaire |
| 5RB40 | United States | South Carolina | Granite | Columbia |
| 5RB41 | United States | South Carolina | Granite | Fairfield Co. |
| 5RB6 | United States | Ohio | Sandstone | Cumberland |
| 5RB8 | United States | Ohio | Sandstone | Independence |
| 5RQ | United States | Ohio | Sandstone | Kipton |
| 6C | United States | Indiana | Limestone | ? |
| 6EE | United States | Ohio | Sandstone | McDermott |
| 6LA25 | United States | Maine | Granite | Wayne |
| 6LA27 | United States | Maine | Granite | Swanville |
| 6LA28 | United States | New York | Sandstone | Olean |
| 6La30 | United States | Kentucky | Sandstone | Livingstone |
| 6LA37 | United States | Connecticut | Granite | Groton |
| 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 |
| 6LB21 | United States | Ohio | Sandstone | Millersburg |
| 6LB22 | United States | Massachusetts | Gneiss | W. Andover |
| 6LB24 | United States | North Carolina | Granite | Charlotte |
| 6LB25 | United States | Maine | Granite | Williamantic |
| 6LB26 | United States | Maine | Granite | Waldoborough |
| 6LB27 | United States | Maine | Granite | Frankfort |
| 6LB34 | United States | Minnesota | Granite | E. St. Cloud |
| 6LB36 | United States | Connecticut | Granite | E. Canaan |
| 6Lb37 | United States | Connecticut | Granite | Branchville |
| 6LB39 | United States | Ohio | Sandstone | Youngstown |
| 6LB40 | United States | Maryland | Granite | Woodstock |
| 6LB41 | United States | South Carolina | Granite | Edgefield Co. |
| 6LB44 | United States | New Hampshire | Granite | Troy |
| 6LB6 | United States | Pennsylvania | Sandstone | Prospect |
| 6LB9 | United States | Pennsylvania | Sandstone | Baden |
| 6RA12 | United States | Pennsylvania | Sandstone | Lucesco |
| 6RA17 | United States | Pennsylvania | Sandstone | Greensburgh |
| 6RA26 | United States | Maine | Granite | Chesterville |
| 6RA27 | United States | Maine | Granite | Brunswick |
| 6RA35 | United States | Connecticut | Granite | Millstone Point |
| 6RA36 | United States | Connecticut | Gneiss | Gastonbury |
| 6RA38 | United States | North Carolina | Granite | Gaston Co. |
| 6RA43 | United States | New Hampshire | Gneiss | Petersborough |
| 6RA47 | United States | Wisconsin | Quartzite | Waterloo |
| 6RB16 | United States | Pennsylvania | Diabase | Round Top Gettysburg |
| 6RB2 | United States | Pennsylvania | Sandstone | Franklin |
| 6RB27 | United States | Maine | Granite | Franklin |
| 6RB3 | United States | Pennsylvania | Sandstone | Kiasola Station Beaver Co. |
| 6RB31 | United States | Texas | Granite | Nr. Llano |
| 6rb32 | United States | Colorado | Granite | Georgetown |
| 6RB35 | United States | Connecticut | Gneiss | Ansonia |
| 6RB36 | United States | Connecticut | Granite | Thomaston |
| 6RB4 | United States | Pennsylvania | Sandstone | Center Bridge |
| 6RB45 | United States | Vermont | Granite | Brunswick |
| 6RB47 | United States | Vermont | Granite | Ryegate |
| 6WE | United States | Ohio | Sandstone | Amherst |
| 7LA21 | United States | North Carolina | Granite | Alamance Co. |
| 7LA24 | United States | Maine | Granite | Round Pond |
| 7LA25 | United States | Maine | Granite | Vinal Haven |
| 7LA29 | United States | California | Sandstone | Livermore |
| 7LA36 | United States | Arizona | Tuff | Kirkland |
| 7LA42 | United States | New Hampshire | Granite | W. Concord |
| 7LA43 | United States | Wisconsin | Quartzite | Waterloo |
| 7LB11 | Austria | Marble | Nabresina | |
| 7Lb18 | United States | Pennsylvania | Gneiss | Chester |
| 7LB22 | United States | North Carolina | Gneiss | Shelby |
| 7LB24 | United States | Maine | Granite | Pownal |
| 7LB28 | United States | Kentucky | Sandstone | Taylor Co. |
| 7LB29 | United States | California | Sandstone | Livermore |
| 7LB32 | United States | Minnesota | Granite | Watab |
| 7Lb34 | United States | Connecticut | Gneiss | Sterling |
| 7LB38 | United States | Maryland | Granite | Woodstock |
| 7LB41 | United States | Montana | Granite | Lewis & Clark Co. |
| 7Lb42 | United States | New Hampshire | Granite | W. Concord |
| 7LQ | United States | Tennessee | Marble | Knoxville |
| 7RA20 | United States | Ohio | Sandstone | Elyria |
| 7RA23 | United States | North Carolina | Granite | Gastonia |
| 7RA26 | United States | New York | Sandstone | Camden |
| 7RA29 | United States | California | Sandstone | Angel Island |
| 7RA32 | United States | Minnesota | Sandstone | Dresback |
| 7RA36 | United States | Missouri | Granite | Knob Lick |
| 7RA40 | United States | Montana | Diorite | Helena |
| 7RA41 | United States | New Hampshire | Granite | Sunapee |
| 7RB16 | United States | Pennsylvania | Soapstone | Montgomery Co. |
| 7RB17 | United States | Pennsylvania | Gneiss | Reading |
| 7RB23 | United States | Maine | Gneiss | Jefferson |
| 7RB33 | United States | Connecticut | Granite | Waterford |
| 7RB34 | United States | Connecticut | Granite | W. Norfolk |
| 7RB36 | United States | Nevada | Sandstone | Carson City |
| 7RB37 | United States | Nevada | Andesite | Virginia City |
| 7RB9 | Austria | Marble | Adnet | |
| 7RQ | United States | Ohio | Sandstone | Kipton |
| 8B | United States | Minnesota | Granite | Isle |
| 8EE | United States | Ohio | Sandstone | Amherst |
| 8La11 | United States | Illinois | Limestone | Belknap |
| 8LA16 | United States | Kentucky | Limestone | Springfield |
| 8La19 | United States | Pennsylvania | Diabase | Goldsboro |