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Stone description: gray
| Wall Number Sort ascending | Country | State | Classification | Source |
|---|---|---|---|---|
| S3-8 | United States | Indiana | Limestone | Bedford |
| S3-7 | United States | Arkansas | Limestone | Batesville |
| S3-6 | United States | Ohio | Sandstone | McDermott |
| S3-4 | United States | Alabama | Marble | Rockwood |
| S3-2 | United States | Indiana | Limestone | Bedford |
| S3-12 | United States | Missouri | Limestone | Carthage |
| S3-11 | United States | Ohio | Sandstone | McDermott |
| S3-10 | United States | Arkansas | Limestone | Batesville |
| S3-1 | United States | Indiana | Limestone | Bedford |
| S2-93 | United States | Vermont | Granite | Derby |
| S2-80 | United States | New Hampshire | Granite | Concord |
| S2-77 | United States | New Hampshire | Granite | Concord |
| S2-76 | United States | New Hampshire | Granite | Concord |
| S2-7 | United States | Ohio | Sandstone | McDermott |
| S2-51 | United States | Maine | Granite | Frankfort |
| S2-5 | United States | Missouri | Limestone | Carthage |
| S2-48 | United States | New Hampshire | Granite | Concord |
| S2-47 | United States | Vermont | Granite | Barre |
| S2-4 | United States | Indiana | Limestone | Bedford |
| S2-162 | United States | North Carolina | Marble | Murphy |
| S2-160 | United States | Tennessee | Marble | Knoxville |
| S2-159 | United States | Tennessee | Marble | Knoxville |
| S2-157 | United States | Tennessee | Marble | Knoxville |
| S2-156 | United States | Tennessee | Marble | Knoxville |
| S2-148 | United States | Georgia | Marble | Tate |
| S2-145 | United States | Alaska | Marble | Tokeen |
| S2-143 | United States | California | Marble | Columbia |
| S2-142 | United States | California | Marble | Columbia |
| S2-141 | United States | Missouri | Marble | Carthage |
| S2-139 | United States | New York | Marble | Plattsburg |
| S2-135 | United States | Vermont | Marble | Pittsford |
| S2-133 | United States | Montana | Marble | Gardner |
| S2-130 | United States | Indiana | Limestone | Bedford |
| S2-128 | United States | Indiana | Limestone | Bedford |
| S2-125 | United States | Kansas | Limestone | Cottonwood |
| S1-9 | United States | Indiana | Limestone | Bedford |
| S1-8 | United States | Indiana | Limestone | Bedford |
| S1-37 | United States | Ohio | Sandstone | Amherst |
| S1-36 | United States | Ohio | Sandstone | Amherst |
| S1-23 | United States | Massachusetts | Granite | Quincy |
| S1-20 | United States | Unknown | Granite | Unknown |
| S1-2 | United States | Ohio | Sandstone | McDermott |
| S1-17 | United States | Unknown | Granite | Unknown |
| S1-11 | United States | Rhode Island | Granite | Westerly |
| S1-10 | United States | Indiana | Limestone | Bedford |
| S1-1 | United States | Ohio | Sandstone | McDermott |
| 9RB23 | United States | Maine | Granite | Hurricane Isl. |
| 9RB22 | United States | Massachusetts | Granite | Worcester |
| 9RB11 | United States | Iowa | Limestone | Givin |
| 9RA32 | Italy | Sandstone | Leghorn | |
| 9RA31 | United States | Connecticut | Gneiss | Branford |
| 9RA16 | United States | Minnesota | Limestone | St. Paul |
| 9RA13 | United States | Kansas | Limestone | Lane |
| 9RA12 | United States | Iowa | Limestone | Iowa City |
| 9RA10 | United States | Iowa | Limestone | Ottumwa |
| 9LB43 | United States | Washington | Sandstone | Tenino |
| 9Lb39 | United States | Oregon | Diabase | Albany region |
| 9Lb37 | United States | Oregon | Sandstone | Forest Grove |
| 9LB36 | United States | Alabama | Sandstone | Greensport |
| 9LB14 | United States | Iowa | Limestone | Fairfield |
| 9LB12 | United States | Iowa | Limestone | Earlham |
| 9LA30 | United States | New York | Sandstone | W. Liberty |
| 9La23 | United States | Massachusetts | Granite | Peabody |
| 9LA15 | Siam (Thailand) | Marble | ? | |
| 8WE | United States | Missouri | Limestone | Carthage |
| 8RB31 | United States | Kentucky | Sandstone | Blue Lick Mountain |
| 8RB25 | United States | North Carolina | Granite | Lexington |
| 8RB23 | United States | North Carolina | Granite | Greensborough |
| 8RA46 | United States | Washington | Sandstone | Bellingham |
| 8RA45 | United States | Washington | Sandstone | Bellingham |
| 8RA42 | United States | Oregon | Basalt | Clackamas Station Clackamas Co |
| 8RA39 | United States | West Virginia | Sandstone | Charleston |
| 8RA38 | United States | Arizona | Tuff | Kirkland |
| 8RA2 | Portugal | Limestone | Freguesias, Coimbra | |
| 8RA15 | United States | Indiana | Limestone | Putnamville |
| 8LB39 | United States | West Virginia | Sandstone | Wheeling |
| 8Lb32 | United States | Texas | Sandstone | Riverside |
| 8LB26 | United States | North Carolina | Granite | Charlotte |
| 8LB24 | United States | North Carolina | Granite | Alamance Co. |
| 8LB21 | United States | Ohio | Sandstone | Steubensville Jefferson Co. |
| 8LB16 | United States | Mississippi | Limestone | Teshomingo County |
| 8LB1 | Portugal | Marble | Alvrite, Coimbra | |
| 8LA6 | United States | New York | Limestone | Louisville |
| 8LA37 | United States | Missouri | Sandstone | Warrensburg |
| 8LA22 | United States | Massachusetts | Diabase | Somerville |
| 8LA21 | United States | Ohio | Sandstone | Steubensville Jefferson Co. |
| 8La19 | United States | Pennsylvania | Diabase | Goldsboro |
| 8LA16 | United States | Kentucky | Limestone | Springfield |
| 8La11 | United States | Illinois | Limestone | Belknap |
| 8EE | United States | Ohio | Sandstone | Amherst |
| 8B | United States | Minnesota | Granite | Isle |
| 7RQ | United States | Ohio | Sandstone | Kipton |
| 7RB9 | Austria | Marble | Adnet | |
| 7RB37 | United States | Nevada | Andesite | Virginia City |
| 7RB36 | United States | Nevada | Sandstone | Carson City |
| 7RB34 | United States | Connecticut | Granite | W. Norfolk |
| 7RB33 | United States | Connecticut | Granite | Waterford |
| 7RB23 | United States | Maine | Gneiss | Jefferson |
| 7RB17 | United States | Pennsylvania | Gneiss | Reading |
| 7RB16 | United States | Pennsylvania | Soapstone | Montgomery Co. |