| Locality | Latitude | Longitude | Distance | Bearing |
|---|
| Unionville, West Marlboro Township, Chester County, Pennsylvania, USA | 39° 53' 43" N | 75° 44' 3" W | 0.0km (0.0 miles) | |
| Unionville, Newlin Township, Chester County, Pennsylvania, USA | 39° 53' 43" N | 75° 44' 3" W | 0.0km (0.0 miles) | |
| Corundum Hill, Unionville, Newlin Township, Chester County, Pennsylvania, USA | 39° 53' 0" N | 75° 43' 59" W | 1.3km (0.8 miles) | |
| Willowdale, East Marlboro Township, Chester County, Pennsylvania, USA | 39° 52' 27" N | 75° 43' 3" W | 2.7km (1.7 miles) | |
| Willowdale, East Goshen Township, Chester County, Pennsylvania, USA | 39° 52' 27" N | 75° 43' 5" W | 2.7km (1.7 miles) | |
| Logan's Quarry, Upland, East Marlboro Township, Chester County, Pennsylvania, USA | 39° 54' 6" N | 75° 46' 5" W | 3.0km (1.8 miles) | |
| Upland, East Marlboro Township, Chester County, Pennsylvania, USA | 39° 53' 11" N | 75° 46' 27" W | 3.6km (2.2 miles) | |
| Henry Pusey's quarry, Willowdale, East Marlboro Township, Chester County, Pennsylvania, USA | 39° 51' 47" N | 75° 44' 43" W | 3.7km (2.3 miles) | |
| R. Baily's Quarry, Unionville, West Marlboro Township, Chester County, Pennsylvania, USA | 39° 51' 59" N | 75° 46' 0" W | 4.2km (2.6 miles) | |
| Chester County Poorhouse Quarry, West Bradford Township, Chester County, Pennsylvania, USA | 39° 56' 33" N | 75° 42' 51" W | 5.5km (3.4 miles) | |
| Kennett Square, Kennett Township, Chester County, Pennsylvania, USA | 39° 50' 48" N | 75° 42' 43" W | 5.7km (3.6 miles) | |
| Pocopson, Birmingham Township, Chester County, Pennsylvania, USA | 39° 54' 0" N | 75° 37' 33" W | 9.3km (5.8 miles) | |
| Nevin's Quarry, Landenberg, London Britain Township, Chester County, Pennsylvania, USA | 39° 48' 45" N | 75° 45' 0" W | 9.3km (5.8 miles) | |
| Copesville, East Bradford Township, Chester County, Pennsylvania, USA | 39° 57' 29" N | 75° 39' 29" W | 9.6km (5.9 miles) | |
| Swain's Quarry, Pennsbury Township, Chester County, Pennsylvania, USA | 39° 50' 10" N | 75° 37' 48" W | 11.1km (6.9 miles) | |
| Osborne Hill, Birmingham Township, Chester County, Pennsylvania, USA | 39° 55' 24" N | 75° 36' 24" W | 11.3km (7.0 miles) | |
| Chadds Ford, Birmingham Township, Chester County, Pennsylvania, USA | 39° 52' 19" N | 75° 35' 51" W | 12.0km (7.4 miles) | |
| Coatesville, Valley Township, Chester County, Pennsylvania, USA | 39° 58' 57" N | 75° 49' 14" W | 12.2km (7.6 miles) | |
| Coatesville pegmatite locality, Coatesville, Valley Township, Chester County, Pennsylvania, USA | 39° 58' 59" N | 75° 49' 30" W | 12.5km (7.7 miles) | |
| Downington, East Caln Township, Chester County, Pennsylvania, USA | 40° 0' 23" N | 75° 42' 11" W | 12.6km (7.9 miles) | |
| Centerville (Centreville), New Castle County, Delaware, USA | 39° 49' 17" N | 75° 37' 0" W | 13.0km (8.1 miles) | |
| Harvey's Quarry, Pennsbury Township, Chester County, Pennsylvania, USA | 39° 51' 59" N | 75° 35' 0" W | 13.3km (8.3 miles) | |
| Landenberg, London Britain Township, Chester County, Pennsylvania, USA | 39° 46' 37" N | 75° 46' 17" W | 13.5km (8.4 miles) | |
| Mount Cuba serpentinite, New Castle County, Delaware, USA | 39° 47' 42" N | 75° 37' 28" W | 14.6km (9.0 miles) | |
| Marshall Quarry, West Goshen Township, Chester County, Pennsylvania, USA | 39° 58' 49" N | 75° 36' 6" W | 14.7km (9.2 miles) | |
| Steidler pegmatite, Wagontown, Valley Township, Chester County, Pennsylvania, USA | 40° 0' 3" N | 75° 50' 35" W | 15.0km (9.3 miles) | |
| Dickson's Quarry (Dixon's Quarry), Wilmington, New Castle County, Delaware, USA | 39° 47' 1" N | 75° 37' 39" W | 15.4km (9.6 miles) | |
| Pocopson, Pocopson Township, Chester County, Pennsylvania, USA | 39° 48' 33" N | 75° 35' 30" W | 15.5km (9.6 miles) | |
| Bullock's Quarry, Brandywine Summit, Chadds Ford Township, Delaware County, Pennsylvania, USA | 39° 51' 41" N | 75° 33' 22" W | 15.7km (9.7 miles) | |
| Woodlawn Quarry, Wilmington, New Castle County, Delaware, USA | 39° 49' 47" N | 75° 34' 16" W | 15.7km (9.8 miles) | |
Corundum Hill, Unionville, Newlin Township, Chester County, Pennsylvania, USA