| Locality | Latitude | Longitude | Distance | Bearing |
|---|
| Keystone Trap Rock Quarry, Cornog, Wallace Township, Chester County, Pennsylvania, USA | 40° 4' 36" N | 75° 44' 53" W | 6.1km (3.8 miles) | |
| Downington, East Caln Township, Chester County, Pennsylvania, USA | 40° 0' 23" N | 75° 42' 11" W | 6.2km (3.8 miles) | |
| Cornog, Wallace Township, Chester County, Pennsylvania, USA | 40° 4' 36" N | 75° 45' 17" W | 6.6km (4.1 miles) | |
| Benjamin Franklin Mine, Chester Springs, West Pikeland Township, Chester County, Pennsylvania, USA | 40° 5' 39" N | 75° 37' 0" W | 6.7km (4.2 miles) | |
| Chester Springs, West Pikeland Township, Chester County, Pennsylvania, USA | 40° 5' 41" N | 75° 37' 0" W | 6.7km (4.2 miles) | |
| General Trimble's Mine, East Whiteland Township, Chester County, Pennsylvania, USA | 40° 3' 4" N | 75° 35' 23" W | 7.8km (4.8 miles) | |
| Marshall Quarry, West Goshen Township, Chester County, Pennsylvania, USA | 39° 58' 49" N | 75° 36' 6" W | 11.1km (6.9 miles) | |
| Copesville, East Bradford Township, Chester County, Pennsylvania, USA | 39° 57' 29" N | 75° 39' 29" W | 11.4km (7.1 miles) | |
| Buckwater Mine, Charlestown Township, Chester County, Pennsylvania, USA | 40° 6' 0" N | 75° 32' 59" W | 12.0km (7.5 miles) | |
| Napolean Mine (Jug Hollow Mine), Schuylkill Township, Chester County, Pennsylvania, USA | 40° 6' 0" N | 75° 32' 59" W | 12.0km (7.5 miles) | |
| Samuel Coffman Mine, East Whiteland Township, Chester County, Pennsylvania, USA | 40° 3' 16" N | 75° 32' 16" W | 12.2km (7.6 miles) | |
| Mill Lane Farms (Great Valley Corporate Center), Valley Store, East Whiteland Township, Chester County, Pennsylvania, USA | 40° 3' 16" N | 75° 31' 59" W | 12.6km (7.8 miles) | |
| Knauertown, Warwick Township, Chester County, Pennsylvania, USA | 40° 10' 17" N | 75° 43' 36" W | 13.1km (8.1 miles) | |
| Valley Store, East Whiteland Township, Chester County, Pennsylvania, USA | 40° 3' 7" N | 75° 31' 35" W | 13.2km (8.2 miles) | |
| Chester County Poorhouse Quarry, West Bradford Township, Chester County, Pennsylvania, USA | 39° 56' 33" N | 75° 42' 51" W | 13.3km (8.3 miles) | |
| Charleston Mine, Charlestown Township, Chester County, Pennsylvania, USA | 40° 6' 29" N | 75° 32' 0" W | 13.7km (8.5 miles) | |
| Phoenix Mine, Charlestown Township, Chester County, Pennsylvania, USA | 40° 5' 50" N | 75° 31' 24" W | 14.0km (8.7 miles) | |
| Saint Peters, Warwick Township, Chester County, Pennsylvania, USA | 40° 10' 48" N | 75° 43' 52" W | 14.1km (8.8 miles) | |
| French Creek Mines, Saint Peters, Warwick Township, Chester County, Pennsylvania, USA | 40° 10' 59" N | 75° 43' 0" W | 14.1km (8.8 miles) | |
| Keim's Mine, French Creek Mines, Saint Peters, Warwick Township, Chester County, Pennsylvania, USA | 40° 11' 0" N | 75° 43' 0" W | 14.1km (8.8 miles) | |
| Montgomery Mine, Schuylkill Township, Chester County, Pennsylvania, USA | 40° 6' 17" N | 75° 31' 32" W | 14.1km (8.8 miles) | |
| Pennypacker Mine, Charlestown Township, Chester County, Pennsylvania, USA | 40° 5' 14" N | 75° 31' 0" W | 14.3km (8.9 miles) | |
| Brookdale Mine, Schuylkill Township, Chester County, Pennsylvania, USA | 40° 6' 3" N | 75° 31' 14" W | 14.4km (8.9 miles) | |
| Southwest Chester County Mine (New Chester County Mine), Schuylkill Township, Chester County, Pennsylvania, USA | 40° 6' 15" N | 75° 31' 18" W | 14.4km (8.9 miles) | |
| Malvern, Malvern Borough, Chester County, Pennsylvania, USA | 40° 2' 10" N | 75° 30' 50" W | 14.4km (9.0 miles) | |
| Trap Quarry, Saint Peters, Warwick Township, Chester County, Pennsylvania, USA | 40° 10' 59" N | 75° 43' 59" W | 14.5km (9.0 miles) | |
| Warwick (Saint Marys), Warwick Township, Chester County, Pennsylvania, USA | 40° 9' 53" N | 75° 47' 2" W | 14.7km (9.1 miles) | |
| Coatesville, Valley Township, Chester County, Pennsylvania, USA | 39° 58' 57" N | 75° 49' 14" W | 14.7km (9.1 miles) | |
| Chester County Mine, Schuylkill Township, Chester County, Pennsylvania, USA | 40° 6' 21" N | 75° 31' 5" W | 14.8km (9.2 miles) | |
| Wagontown, Valley Township, Chester County, Pennsylvania, USA | 40° 0' 38" N | 75° 50' 34" W | 14.8km (9.2 miles) | |
Keystone Trap Rock Quarry, Cornog, Wallace Township, Chester County, Pennsylvania, USA