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Stone description: fine grain
| Wall Number | Country | State | Classification | Source Sort descending |
|---|---|---|---|---|
| 5RA16 | United States | Ohio | Sandstone | Leesville |
| 4LB20 | United States | Connecticut | Granite | Leete Isl. |
| 1L2 | United States | Connecticut | Granite | Leete lsl. |
| 4LB19 | Italy | Limestone | Leghorn | |
| 13LB29 | Italy | Limestone | Leghorn | |
| 13RA2 | United States | Illinois | Dolomite | Lemont |
| 12LB3 | United States | Illinois | Dolomite | Lemont |
| 13LB2 | United States | Illinois | Dolomite | Lemont |
| 13LA2 | United States | Illinois | Dolomite | Lemont |
| 11RA3 | United States | Illinois | Dolomite | Lemont |
| 5LB19 | United States | Massachusetts | Granite | Leominister |
| 12RA12 | United States | Ohio | Dolomite | Lexington |
| 8RB25 | United States | North Carolina | Granite | Lexington |
| 12RA13 | United States | Ohio | Dolomite | Lima |
| 10LA11 | United States | Ohio | Dolomite | Lima |
| 12La13 | United States | Kentucky | Dolomite | Lincoln Co. |
| 13LB44 | United States | Kentucky | Limestone | Lincoln Co. |
| 6LA26 | United States | Maine | Granite | Lincolnville |
| 13LB43 | United States | Kentucky | Limestone | Litchfield |
| 5RA11 | United States | Ohio | Sandstone | Lithopolis |
| 8RB39 | United States | New Jersey | Sandstone | Little Falls |
| 7LA29 | United States | California | Sandstone | Livermore |
| 7LB29 | United States | California | Sandstone | Livermore |
| 6La30 | United States | Kentucky | Sandstone | Livingstone |
| 13La46 | United States | Kentucky | Limestone | Livingstone |
| 8LA30 | United States | New York | Sandstone | Lockport |
| 13LB6 | United States | New York | Dolomite | Lockport |
| 14LA1 | United States | Indiana | Dolomite | Logansport |
| 7RA43 | United States | Wisconsin | Granite | Lohrville |
| 8RB3 | Portugal | Limestone | Lombas, Leiria | |
| 8RA33 | United States | Colorado | Sandstone | Longmont |
| 11LB1 | United States | Indiana | Dolomite | Longwood |
| 5RB30 | United States | California | Tuff | Lordsburg |
| 5RB25 | United States | North Carolina | Granite | Louisburg |
| 10LB27 | United States | North Carolina | Granite | Louisburg |
| 12LB12 | United States | Kentucky | Dolomite | Louisville |
| 11LA33 | United States | Ohio | Limestone | Lumberton |
| 8RA19 | United States | Pennsylvania | Sandstone | Lumberton |
| 10R51 | United States | Pennsylvania | Argillite (Slate) | Lynnport |
| 10L51 | United States | Pennsylvania | Argillite (Slate) | Lynnport |
| 9RA17 | United States | Pennsylvania | Argillite (Slate) | Lynnport |
| 10LB18 | United States | Pennsylvania | Argillite (Slate) | Lynnport |
| 8RB16 | United States | Wisconsin | Limestone | Madison |
| 6RA1 | United States | Pennsylvania | Sandstone | Mainesburgh |
| 10LA3 | United States | Vermont | Marble | Mallett's Bay |
| 10RA4 | United States | Vermont | Marble | Mallett's Bay |
| 10RA5 | United States | Vermont | Marble | Mallett's Bay |
| 10LA4 | United States | Vermont | Marble | Mallett's Bay |
| 2L15 | United States | Vermont | Marble | Mallett's Bay |
| 2R15 | United States | Vermont | Marble | Mallett's Bay |
| 14LB3 | United States | Vermont | Marble | Mallett's Bay |
| 10RA3 | United States | Vermont | Marble | Mallett's Bay |
| 10RB9 | United States | Vermont | Marble | Mallett's Bay |
| 11RB29 | United States | Virginia | Sandstone | Manassas |
| 8LB35 | United States | Connecticut | Sandstone | Manchester |
| 11LB37 | United States | Virginia | Granite | Manchester |
| 14LB15 | United States | Iowa | Dolomite | Manchester |
| 9LA13 | United States | Kansas | Limestone | Manhattan |
| 12RB6 | United States | Wisconsin | Dolomite | Manitowoc |
| 9C | United States | Minnesota | Limestone | Mankato |
| 13RA7 | United States | Minnesota | Dolomite | Mankato |
| 17C | United States | Minnesota | Limestone | Mankato |
| 1C | United States | Minnesota | Limestone | Mankato |
| 14LA42 | Portugal | Marble | Manoel Zuarte, Leiria | |
| 7La18 | United States | Pennsylvania | Quartzite | Mapleton |
| 9RA4 | United States | Colorado | Marble | Marble |
| 9LA3 | United States | Colorado | Marble | Marble |
| 14LA21 | United States | Iowa | Limestone | Marble Rock |
| 10LB13 | United States | Iowa | Limestone | Marble Rock |
| 13LA36 | Hungary | Limestone | Margarethen Leitha Mts. | |
| 14LA37 | Hungary | Limestone | Margarethen Leitha Mts. | |
| 5RA5 | United States | Ohio | Sandstone | Marietta |
| 5RA13 | United States | Ohio | Sandstone | Marietta |
| 7RB27 | United States | Kentucky | Sandstone | Marion |
| 10La9 | United States | Kansas | Dolomite | Marion Center |
| 11RB9 | United States | Kansas | Dolomite | Marion Center |
| 5RB44 | United States | New Hampshire | Granite | Marlborough |
| 7RA42 | United States | Michigan | Sandstone | Marquette |
| 12LA15 | United States | Iowa | Dolomite | Marshalltown |
| 12RA21 | United States | Iowa | Limestone | Marshalltown |
| 11RB12 | United States | Missouri | Dolomite | Marshfield |
| 6RA42 | United States | New Jersey | Sandstone | Martinville |
| 9LA45 | Canada | Sandstone | Mary's Point, New Brunswick | |
| 11RB10 | United States | Kansas | Dolomite | Marysville |
| 10RA37 | United States | New Hampshire | Granite | Mason |
| 4RB20 | United States | New Hampshire | Granite | Mason |
| 14RA23 | United States | Iowa | Limestone | Mason City |
| 13LB13 | United States | Iowa | Limestone | Mason City |
| 6RA5 | United States | Pennsylvania | Sandstone | Mauch Chunk |
| 10Lb46 | United States | Wisconsin | Sandstone | Mauston |
| 10Lb47 | United States | Wisconsin | Sandstone | Mauston |
| 6RQ | United States | Ohio | Sandstone | McDermont |
| 8RQ | United States | Ohio | Sandstone | McDermont |
| 10RB29 | United States | New York | Sandstone | Medina |
| 6La7 | United States | Pennsylvania | Sandstone | Meshoppen |
| 10LA38 | Mexico | Dacite | Mexico State | |
| 13RA22 | United States | Missouri | Sandstone | Miami Station Carroll Co. |
| 5LA34 | United States | Connecticut | Gneiss | Middletown |
| 6RA44 | United States | New Hampshire | Granite | Milford |
| 10RA40 | United States | New Hampshire | Granite | Milford |