Locality type: Quarry Classification Species: Bertrandite Formula: Be4 (Si2 O7 )(OH)2 Formation: Secondary Comments: Micro-crystals and aggregates in voids left by dissolved beryl crystals. Also part of a suite of micro-minerals pseudomorphing beryl crystals. Habit: multiple forms, from simple to complex and as various twins. Usually flattened, elongated, or blocky. Colour: colorless Quality for species: Good crystals or rich for species - important (!) Significance: Unusual or interesting association, relationships with other species, pseudomorphism etc. - see notes. Abundance at site: Common Confirmation Validity: Confirmed Confirmation Methods: Visually Identified Associated Minerals Based on Photo Data: Quartz 29 Muscovite 19 Albite 17 K Feldspar 17 - var Adularia 17 Beryl 9 Microcline 2 Chlorite Group 1 Wulfenite 1 Almandine 1 Columbite-(Fe)-Columbite-(Mn) Series 1 Data Mineral Data: Click here to view Bertrandite data Locality Data: Click here to view Biermann Quarries (Bethel quarries; Codfish Hill Quarry), Bethel, Fairfield County, Connecticut, USA Photo Gallery View Gallery (19 photos) Data Identifiers Mindat Occurrence Record ID: 37846 Long-form Identifier: 1:3:37846:0 GUID (UUID V4 ): 0 Nearest other occurrences of Bertrandite
1.7km (1.1 miles) ⓘ Captain Cook's Quarry (Purdy Station Quarry), Newtown, Fairfield County, Connecticut, USA 11.4km (7.1 miles) ⓘ U. S. Route 7 Expressway (Danbury line to Iron Works District), Brookfield, Fairfield County, Connecticut, USA 12.1km (7.5 miles) ⓘ Fillow Quarry, Branchville, Redding, Fairfield County, Connecticut, USA 12.2km (7.6 miles) ⓘ Old Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA 15.4km (9.6 miles) ⓘ Casey Quarry (Ridgefield pegmatite), Ridgefield, Fairfield County, Connecticut, USA 15.9km (9.9 miles) ⓘ State Route 25 road cuts, Trumbull, Fairfield County, Connecticut, USA 18.1km (11.2 miles) ⓘ Curtis Quarry, Southford, Southbury, New Haven County, Connecticut, USA 27.8km (17.3 miles) ⓘ Woodbury pegmatite quarry (Judson Quarry), Woodbury, Litchfield County, Connecticut, USA 29.7km (18.4 miles) ⓘ Bedford, Westchester County, New York, USA 30.3km (18.8 miles) ⓘ Baylis Quarry (Bayliss Quarry), Bedford, Westchester County, New York, USA References Search for references including Bertrandite Biermann Quarries (Bethel quarries; Codfish Hill Quarry), Bethel, Fairfield County, Connecticut, USA
Biermann Quarries, Bethel, Fairfield County, Connecticut, USA