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

Mineral Species
Species:Microcline
Formula:K(AlSi3O8)
Description
Comments:aka - perthite. A major rock-forming component of the pegmatites, the largest and best crystals terminate in the quartz cores and can reach over 20 cm.
Habit:anhedral to subhedral blocky
Colour:white, tan, pale pink
Quality for species:Rock forming mineral/non-crystalline/little interest for collectors.(##)
Abundance at site:Extremely common
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
References
References:Cameron, Eugene N., Larrabee David M., McNair, Andrew H., Page, James T., Stewart, Glenn W., and Shainin, Vincent E. (1954), Pegmatite Investigations 1942-45 New England. USGS Professional Paper 255.
Associated Minerals Based on Photo Data:
Smoky Quartz3 photos of Microcline associated with Smoky Quartz at this locality.
Albite1 photo of Microcline associated with Albite at this locality.
Data
Mineral Data:Click here to view Microcline data
Locality Data:Click here to view Case Quarries, Portland, Middlesex Co., Connecticut, USA
Nearest other occurrences of Microcline
1.3km (0.8 miles) A Gotta-Walden Prospect, Portland, Middlesex Co., Connecticut, USA
1.4km (0.9 miles) B Gotta-Wannerstrom Quarry, Portland, Middlesex Co., Connecticut, USA
1.4km (0.9 miles) C Bordonaro Quarry, Portland, Middlesex Co., Connecticut, USA
1.5km (1.0 miles) D Walden Gem Quarry, Portland, Middlesex Co., Connecticut, USA
1.5km (1.0 miles) E Hale Quarry (Andrews Quarry; Glastonbury Quarry), Portland, Middlesex Co., Connecticut, USA
1.8km (1.1 miles) F Andrews Quarry (old Hale Quarry; Grandfather Andrews Quarry), Portland, Middlesex Co., Connecticut, USA
1.9km (1.2 miles) G Simpson Quarry (Wiarda Quarry), South Glastonbury, Glastonbury, Hartford Co., Connecticut, USA
2.1km (1.3 miles) H Hollister prospects (Hollister Quarry), South Glastonbury, Glastonbury, Hartford Co., Connecticut, USA
2.3km (1.4 miles) I Howe Quarry (Howe #1 Quarry; Huspband Quarry), South Glastonbury, Glastonbury, Hartford Co., Connecticut, USA
2.4km (1.5 miles) J Synnott Quarry, Portland, Middlesex Co., Connecticut, USA
2.4km (1.5 miles) K Griswold Quarry, South Glastonbury, Glastonbury, Hartford Co., Connecticut, USA
2.7km (1.7 miles) L Pelton's Quarry, Portland, Middlesex Co., Connecticut, USA
2.7km (1.7 miles) M Husband Quarry, South Glastonbury, Glastonbury, Hartford Co., Connecticut, USA
2.7km (1.7 miles) N Unnamed prospects, South Glastonbury, Glastonbury, Hartford Co., Connecticut, USA
2.8km (1.8 miles) O Howe #4 Quarry and Eureka Quarries, South Glastonbury, Glastonbury, Hartford Co., Connecticut, USA
3.3km (2.1 miles) P Chamberlain Lane, South Glastonbury, Glastonbury, Hartford Co., Connecticut, USA
3.6km (2.2 miles) Q John C. Wiarda Quarry, South Glastonbury, Glastonbury, Hartford Co., Connecticut, USA
3.7km (2.3 miles) R 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) S Strickland Quarry (Eureka Quarry), Strickland pegmatite (Strickland-Cramer Quarry; Strickland-Cramer Mine; Strickland-Cramer Feldspar-Mica Quarries), Collins Hill, Portland, Middlesex Co., Connecticut, USA
4.3km (2.7 miles) T Roaring Brook Quarry, South Glastonbury, Glastonbury, Hartford Co., Connecticut, USA
4.5km (2.8 miles) U Hale-Walker prospects, Collins Hill, Portland, Middlesex Co., Connecticut, USA
4.6km (2.9 miles) V State Forest Quarry No. 1 (State Forest #1 Quarry; Clark Hill Quarry), East Hampton (Chatham), Middlesex Co., Connecticut, USA
4.8km (3.0 miles) W Nathan Hall Quarry (Clark Hill Quarry), East Hampton (Chatham), Middlesex Co., Connecticut, USA
5.0km (3.1 miles) X Clark Hill prospect, East Hampton (Chatham), Middlesex Co., Connecticut, USA
5.8km (3.6 miles) Y Great Hill cobalt mines, Cobalt, East Hampton (Chatham), Middlesex Co., Connecticut, USA
5.9km (3.7 miles) Z Brack Gem prospect (Brack prospect), East Glastonbury, Glastonbury, Hartford Co., Connecticut, USA
6.0km (3.8 miles) 0 East Glastonbury Quarry (Curtis Quarry), East Glastonbury, Glastonbury, Hartford Co., Connecticut, USA
6.1km (3.8 miles) 1 State Forest Quarry #2 (State Forest No. 2 Mica Mine), Cobalt, East Hampton (Chatham), Middlesex Co., Connecticut, USA
6.3km (3.9 miles) 2 Great Hill Pond Brook pegmatite, Cobalt, East Hampton (Chatham), Middlesex Co., Connecticut, USA
6.9km (4.3 miles) 3 Spinelli prospect (Spinelli quarry), Glastonbury, Hartford Co., Connecticut, USA
7.4km (4.6 miles) 4 Paxton Way, Glastonbury, Hartford Co., Connecticut, USA
7.8km (4.8 miles) 5 Riverside Quarry (Western Quarry), White Rock District (White Rocks District), Middletown, Middlesex Co., Connecticut, USA
8.1km (5.0 miles) 6 White Rocks Quarry (Consolidated Quarry), White Rock District (White Rocks District), Middletown, Middlesex Co., Connecticut, USA
8.4km (5.2 miles) 7 The Feldspar Corp. Quarry, White Rock District (White Rocks District), Middletown, Middlesex Co., Connecticut, USA
8.7km (5.4 miles) 8 Bishop Hill Schorl Locality, East Hampton (Chatham), Middlesex Co., Connecticut, USA
8.8km (5.5 miles) 9 Vespa stone quarry, East Hampton (Chatham), Middlesex Co., Connecticut, USA
Mineral and/or Locality  
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