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Cordierite from
Case Quarries, Portland, Middlesex Co., Connecticut, USA

Mineral Species
Species:Cordierite
Formula:(Mg,Fe)2Al3(AlSi5O18)
Description
Comments:Crystals to a few cm long found in a coarse-grained phase (albite, smoky quartz, cordierite, biotite) of the metamorphic rock surrounding the pegmatites.
Habit:elongated prisms
Colour:dark purple to gray (altered to gray-green on surface)
Quality for species:not specified / average specimens
Abundance at site:Very Rare
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
References
References:Collection of David and Brenda Bodnar
Data
Mineral Data:Click here to view Cordierite data
Locality Data:Click here to view Case Quarries, Portland, Middlesex Co., Connecticut, USA
Nearest other occurrences of Cordierite
3.7km (2.3 miles) A Schoonmaker Mine (Cramer Mine), Strickland pegmatite (Strickland-Cramer Quarry; Strickland-Cramer Mine; Strickland-Cramer Feldspar-Mica Quarries), Collins Hill, Portland, Middlesex Co., Connecticut, USA
3.8km (2.4 miles) B Strickland Quarry (Eureka Quarry), Strickland pegmatite (Strickland-Cramer Quarry; Strickland-Cramer Mine; Strickland-Cramer Feldspar-Mica Quarries), Collins Hill, Portland, Middlesex Co., Connecticut, USA
13.3km (8.3 miles) C Unnamed amphibole-tourmaline-magnetite locality, Haddam Neck, Haddam, Middlesex Co., Connecticut, USA
16.6km (10.3 miles) D Chrysoberyl locality, Haddam, Middlesex Co., Connecticut, USA
17.9km (11.1 miles) E Timms Hill (Tim's Hill; Iolite Hill), Haddam, Middlesex Co., Connecticut, USA
19.3km (12.0 miles) F Beaver Meadow Road - State Route 9 Interchange, Haddam, Middlesex Co., Connecticut, USA
35.9km (22.3 miles) G Hungry Hill, Guilford, New Haven Co., Connecticut, USA
55.0km (34.2 miles) H Cordierite locality, Union, Tolland Co., Connecticut, USA
57.3km (35.6 miles) I Westfield, Hampden Co., Massachusetts, USA
63.6km (39.5 miles) J Brimfield, Hampden Co., Massachusetts, USA
67.8km (42.2 miles) K Sturbridge, Worcester Co., Massachusetts, USA
72.8km (45.2 miles) L Warren, Worcester Co., Massachusetts, USA
75.9km (47.2 miles) M Ware, Hampshire Co., Massachusetts, USA
77.1km (47.9 miles) N New Marlborough, Berkshire Co., Massachusetts, USA
79.7km (49.5 miles) O Chester Emery Mines, Chester, Hampden Co., Massachusetts, USA
100.5km (62.4 miles) P Cumberland Hill, Cumberland, Providence Co., Rhode Island, USA
103.8km (64.5 miles) Q Cumberland, Providence Co., Rhode Island, USA
115.5km (71.7 miles) R DiRubbo Emery Quarry, Cortlandt Township, Westchester Co., New York, USA
128.1km (79.6 miles) S Richmond, Cheshire Co., New Hampshire, USA
141.3km (87.8 miles) T Fort George (192nd Street & Audubon Avenue), Washington Heights, Manhattan Island, Manhattan (New York Co.), New York City, New York, USA
142.1km (88.3 miles) U Englewood, Bergen Co., New Jersey, USA
146.4km (91.0 miles) V Cheshire Co., New Hampshire, USA
156.9km (97.5 miles) W Osgood Graphite Mine, Nelson, Cheshire Co., New Hampshire, USA
166.1km (103.2 miles) X Stoddard, Cheshire Co., New Hampshire, USA
187.4km (116.4 miles) Y Unity, Sullivan Co., New Hampshire, USA
202.5km (125.9 miles) Z Ascutney Mountain complex, Windsor Co., Vermont, USA
Mineral and/or Locality  
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