| Country | State | Classification | Source | WallNo | Centennial | Commercial | Location | surroundPic |
| United States | Pennsylvania | Serpentine | W. Chester | 8Lb18 | 27319 | y | Front Face (South) | DSCF0248.jpg |
Description |
| green |
| coarse grain |
| impure |
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No 8LB18 is:
| Picture of the Archive Stone: |
Actual Picture from the Stone Wall:
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