Locality type: Quarry Classification Species: Columbite-(Fe) Formula: Fe2+ Nb2 O6 Comments: Found in all the pegmatites usually to a couple of cm, the crystals typically subhedral when in matrix, euhedral crystals from pockets very rare but can reach 3 cm. Habit: tabular to elongated prisms Colour: black with iridescence Quality for species: Good crystals or rich for species - important (!) Confirmation Validity: Confirmed Confirmation Methods: Visually Identified Associated Minerals Based on Photo Data: Albite 11 Quartz 7 Microcline 4 Beryl 3 Muscovite 2 Zircon 2 Data Mineral Data: Click here to view Columbite-(Fe) data Locality Data: Click here to view Case Quarries, Portland, Middlesex County, Connecticut, USA Photo Gallery View Gallery (6 photos) Data Identifiers Mindat Occurrence Record ID: 153186 Long-form Identifier: 1:3:153186:2 GUID (UUID V4 ): 0 Localities for Columbite-(Fe) in this Region Case Quarry No. 1, Case Quarries, Portland, Middlesex County, Connecticut, USA Case Quarry No. 2, Case Quarries, Portland, Middlesex County, Connecticut, USA Case Quarry No. 3, Case Quarries, Portland, Middlesex County, Connecticut, USA Nearest other occurrences of Columbite-(Fe)
0.0km (0.0 miles) ⓘ Case Quarry No. 1, Case Quarries, Portland, Middlesex County, Connecticut, USA 0.0km (0.0 miles) ⓘ Case Quarry No. 2, Case Quarries, Portland, Middlesex County, Connecticut, USA 0.1km (0.1 miles) ⓘ Case Quarry No. 3, Case Quarries, Portland, Middlesex County, Connecticut, USA 1.4km (0.9 miles) ⓘ Bordonaro Quarry, Portland, Middlesex County, Connecticut, USA 1.5km (0.9 miles) ⓘ Walden Gem Quarry, Portland, Middlesex County, Connecticut, USA 1.5km (0.9 miles) ⓘ Hale Quarry (Andrews Quarry; Glastonbury Quarry), Portland, Middlesex County, Connecticut, USA 1.8km (1.1 miles) ⓘ Andrews Quarry (old Hale Quarry; Grandfather Andrews Quarry), Portland, Middlesex County, Connecticut, USA 1.9km (1.2 miles) ⓘ Simpson prospect #1, South Glastonbury, Glastonbury, Hartford County, Connecticut, USA 2.1km (1.3 miles) ⓘ Simpson Quarry (Wiarda Quarry), South Glastonbury, Glastonbury, Hartford County, Connecticut, USA 2.3km (1.4 miles) ⓘ Howe Quarry (Howe #1 Quarry; Huspband Quarry), South Glastonbury, Glastonbury, Hartford County, Connecticut, USA References Cameron, Eugene N., Larrabee, David M., McNair, Andrew H., Page, James J., Stewart, Glen W., Shainin, Vincent E. (1954) Pegmatite Investigations, 1942-45, in New England. Geological Survey Professional Paper 255. US Geological Survey doi:10.3133/pp255 Search for references including Columbite-(Fe) Case Quarries, Portland, Middlesex County, Connecticut, USA
Case Quarry No. 3, Case Quarries, Portland, Middlesex County, Connecticut, USA