Locality type: Mine Classification Species: Magnetite Formula: Fe2+ Fe2 3+ O4 Comments: Magnetite was the main constituant or primary ore processed at Cornwall. The mines were in continuous operation, to varying degrees, from 1740, up to the time of it's closing and ranked as the longest continuing mining operation in the US. The mines were finally closed by flood waters created when Hurricane Agnes came through the area in 1972. Habit: octahedral, frequently with crystal edging modifications Colour: Silvery grey, metalic luster Quality for species: Good crystals or rich for species - important (!) Abundance at site: Extremely common Confirmation Validity: Confirmed Confirmation Methods: Visually Identified Associated Minerals Based on Photo Data: Pyrite 12 Azurite 3 Actinolite 3 Chlorite Group 2 Serpentine Subgroup 2 Chalcopyrite 1 Data Mineral Data: Click here to view Magnetite data Locality Data: Click here to view Cornwall Mines (Cornwall Iron Mine), Cornwall Borough (Cornwall), Lebanon County, Pennsylvania, USA Photo Gallery View Gallery (11 photos) Data Identifiers Mindat Occurrence Record ID: 38881 Long-form Identifier: 1:3:38881:0 GUID (UUID V4 ): 0 Nearest other occurrences of Magnetite
10.4km (6.4 miles) ⓘ Carper mine, South Annville Township, Lebanon County, Pennsylvania, USA 23.6km (14.7 miles) ⓘ Mud Lake - Grubb Lake, West Hempfield Township, Lancaster County, Pennsylvania, USA 40.3km (25.1 miles) ⓘ Reeser's Summit, Frogtown, York County, Pennsylvania, USA 40.6km (25.3 miles) ⓘ Fritz Island Mines, Cumru Township, Berks County, Pennsylvania, USA 45.4km (28.2 miles) ⓘ Grace Mine, Morgantown, Berks County, Pennsylvania, USA 47.6km (29.6 miles) ⓘ Blandon, Maidencreek Township, Berks County, Pennsylvania, USA 48.0km (29.8 miles) ⓘ Jones mine, Caernarvon Township, Berks County, Pennsylvania, USA 49.5km (30.7 miles) ⓘ Unnamed roadcut, Rossville, Warrington Township, York County, Pennsylvania, USA 52.1km (32.4 miles) ⓘ Hopewell Mines, Warwick (Saint Marys), Warwick Township, Chester County, Pennsylvania, USA 52.1km (32.4 miles) ⓘ Hopewell mine, Hopewell Mines, Warwick (Saint Marys), Warwick Township, Chester County, Pennsylvania, USA References Search for references including Magnetite Cornwall Mines (Cornwall Iron Mine), Cornwall Borough (Cornwall), Lebanon County, Pennsylvania, USA
Cornwall Mines, Cornwall Borough, Lebanon County, Pennsylvania, USA