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Stone description: gray
| Wall Number | Country | State | Classification Sort descending | Source |
|---|---|---|---|---|
| 13LB38 | United States | New York | Marble | Port Henry |
| 1R14 | Italy | Marble | Carrara | |
| S2-145 | United States | Alaska | Marble | Tokeen |
| 3R10 | Australia | Marble | New South Wales | |
| S2-148 | United States | Georgia | Marble | Tate |
| 3r5 | United States | New York | Marble | Moriah |
| 7LB11 | Austria | Marble | Nabresina | |
| S2-156 | United States | Tennessee | Marble | Knoxville |
| 12LA27 | Italy | Marble | Serravezza | |
| 14RA31 | Austria | Marble | Karst | |
| 4L1 | Italy | Marble | Carrara | |
| S2-157 | United States | Tennessee | Marble | Knoxville |
| 4LA17 | United States | Vermont | Marble | W. Rutland |
| S2-159 | United States | Tennessee | Marble | Knoxville |
| 11Lq | United States | Tennessee | Marble | Knoxville |
| S2-160 | United States | Tennessee | Marble | Knoxville |
| 12LB20 | United States | Vermont | Marble | W. Rutland |
| 4R1 | Italy | Marble | Carrara | |
| S2-162 | United States | North Carolina | Marble | Murphy |
| S3-4 | United States | Alabama | Marble | Rockwood |
| 12RA26 | Italy | Marble | Serravezza | |
| 4RA17 | United States | Vermont | Marble | W. Rutland |
| 11RA31 | United States | Tennessee | Marble | Knoxville |
| 12RA31 | United States | Maryland | Marble | Keedysville |
| 8LB1 | Portugal | Marble | Alvrite, Coimbra | |
| 11RA33 | Italy | Marble | Serravezza | |
| 12RB20 | United States | Vermont | Marble | W. Rutland |
| 11LA27 | United States | Tennessee | Marble | Knoxville |
| 12RB30 | United States | New York | Marble | Chazy |
| 9LA15 | Siam (Thailand) | Marble | ? | |
| S2-133 | United States | Montana | Marble | Gardner |
| 11LA29 | Italy | Marble | Serravezza | |
| S2-135 | United States | Vermont | Marble | Pittsford |
| 10LA17 | Australia | Marble | South Australia | |
| 14LA32 | Austria | Marble | Trent | |
| S2-139 | United States | New York | Marble | Plattsburg |
| 10RA13 | United States | Ohio | Dolomite | White House |
| 10RA15 | United States | Ohio | Dolomite | White House |
| 13LB9 | United States | Ohio | Dolomite | Sandusky |
| 13RA13 | United States | Iowa | Dolomite | Humbolt |
| 12LB12 | United States | Kentucky | Dolomite | Louisville |
| 14RB1 | United States | Indiana | Dolomite | Bluffton |
| 10LB12 | United States | Kansas | Dolomite | Topeka |
| 12LB16 | United States | Iowa | Dolomite | Cedar Falls |
| 11RA10 | United States | Ohio | Dolomite | Milton Twp. Woods Co. |
| 14RB3 | United States | Illinois | Dolomite | Chicago |
| 10LA13 | United States | Maryland | Dolomite | Findlay |
| 6RB16 | United States | Pennsylvania | Diabase | Round Top Gettysburg |
| 9Lb39 | United States | Oregon | Diabase | Albany region |
| 8La19 | United States | Pennsylvania | Diabase | Goldsboro |
| 6LB16 | United States | Pennsylvania | Diabase | Gettysburg |
| 8LA22 | United States | Massachusetts | Diabase | Somerville |
| 5LA42 | United States | New Jersey | Diabase | Rock Church |
| 10RA44 | United States | New Jersey | Diabase | W. New York |
| 7LA36 | United States | Arizona | Tuff | Kirkland |
| 8RA38 | United States | Arizona | Tuff | Kirkland |
| 5LB28 | United States | California | Tuff | Cordelia |
| 5LB13 | United States | Massachusetts | Gneiss | Westford |
| 6RA43 | United States | New Hampshire | Gneiss | Petersborough |
| 5LB14 | United States | Massachusetts | Gneiss | Westford |
| 5LA21 | United States | North Carolina | Gneiss | Greensborough |
| 5LB20 | United States | North Carolina | Gneiss | Jamestown |
| 11LB42 | United States | North Carolina | Gneiss | Hickory |
| 7Lb18 | United States | Pennsylvania | Gneiss | Chester |
| 7LB22 | United States | North Carolina | Gneiss | Shelby |
| 6RB35 | United States | Connecticut | Gneiss | Ansonia |
| 5LB35 | United States | Connecticut | Gneiss | Lyme |
| 7RB17 | United States | Pennsylvania | Gneiss | Reading |
| 9RA31 | United States | Connecticut | Gneiss | Branford |
| 10LB22 | United States | Massachusetts | Gneiss | Monson |
| 6LB22 | United States | Massachusetts | Gneiss | W. Andover |
| 7RB23 | United States | Maine | Gneiss | Jefferson |
| 10LB25 | United States | Massachusetts | Gneiss | Northfield |
| 7Lb34 | United States | Connecticut | Gneiss | Sterling |
| 5RA36 | United States | Connecticut | Gneiss | Bolton |
| 6RA36 | United States | Connecticut | Gneiss | Gastonbury |
| 6RA47 | United States | Wisconsin | Quartzite | Waterloo |
| 7LA43 | United States | Wisconsin | Quartzite | Waterloo |
| 10LB17 | United States | Pennsylvania | Soapstone | Montgomery Co. |
| 7RB16 | United States | Pennsylvania | Soapstone | Montgomery Co. |
| 7RB37 | United States | Nevada | Andesite | Virginia City |
| 10RA47 | United States | Tennessee | Syenite | Hiwasee copper mines |
| 8RA42 | United States | Oregon | Basalt | Clackamas Station Clackamas Co |
| 5LB29 | United States | California | Basalt | Bridgeport |
| 10RB35 | Mexico | Pumice | San Juan, Pueblo State | |
| 7RA40 | United States | Montana | Diorite | Helena |