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Microcline from
Hewitt Gem Quarry (Herb's Gem Quarry; Sawmill Quarry), Haddam, Middlesex Co., Connecticut, USA

Mineral Species
Species:Microcline
Formula:K(AlSi3O8)
Description
Comments:Stugard (1958) established through sampling various pegmatites that microcline is the K-feldspar of the Middletown Pegmatite District, though this location was not sampled. Much of it is rock forming grains, except at the intermediate/quartz core zone boundary where inward oriented, subhedral prismatic crystals to 30 cm grade into the amazonite variety.
Habit:massive to subhedral
Colour:tan to pale green or yellow-green
Quality of samples:Rock forming mineral/non-crystalline/little interest for collectors.(##)
Rarity at site:Extremely common
Confirmation
Validity:Believed Valid
References
References:
Seaman, David (1976): "Pegmatite Minerals of the World" in: Januzzi, Ronald E. and David Seaman.(1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. (The Mineralogical Press: Danbury, Connecticut).; Harold Moritz field observations 2015.
Associated Minerals Based on Photo Data:
Elbaite2 photos of Microcline associated with Elbaite at this locality.
Data
Mineral Data:Click here to view Microcline data
Locality Data:Click here to view Hewitt Gem Quarry (Herb's Gem Quarry; Sawmill Quarry), Haddam, Middlesex Co., Connecticut, USA
Nearest other occurrences of Microcline
0.5km (0.3 miles) A Long Hill (Turkey Hill) prospects, Haddam, Middlesex Co., Connecticut, USA
0.6km (0.4 miles) B Civilian Conservation Corps prospect (CCC prospect; Cook columbite prospect), Haddam, Middlesex Co., Connecticut, USA
0.7km (0.4 miles) C Civilian Conservation Corps Quarry (CCC Quarry; Smith Quarry; Turkey Hill quarry lot), Haddam, Middlesex Co., Connecticut, USA
0.7km (0.5 miles) D Nemo's Quarry, Haddam, Middlesex Co., Connecticut, USA
0.9km (0.5 miles) E Long Hill Quarry, Haddam, Middlesex Co., Connecticut, USA
1.1km (0.7 miles) F Long-lot Quarry, Haddam, Middlesex Co., Connecticut, USA
1.1km (0.7 miles) G Arnold Quarry, Haddam, Middlesex Co., Connecticut, USA
1.2km (0.7 miles) H Gulf Quarry, Haddam, Middlesex Co., Connecticut, USA
2.0km (1.3 miles) I Jail Hill Road locality (Jail Hill Quarry), Haddam, Middlesex Co., Connecticut, USA
2.2km (1.3 miles) J Arnold Granite Quarry (General Brainerd Quarry; Great Hill Quarry; Hazelton Quarry; Haddam Quarry; Brookes Quarry), Haddam, Middlesex Co., Connecticut, USA
3.2km (2.0 miles) K Hill above the parsonage, Haddam, Middlesex Co., Connecticut, USA
3.4km (2.1 miles) L Connecticut Yankee atomic power plant, Haddam Neck, Haddam, Middlesex Co., Connecticut, USA
3.7km (2.3 miles) M Kelsey prospect (Parmalee farm), Haddam, Middlesex Co., Connecticut, USA
3.8km (2.4 miles) N Tourmaline locality, Haddam, Middlesex Co., Connecticut, USA
4.1km (2.5 miles) O Quarry Hill (Brainerd Quarries; Shailor Quarries), Haddam Neck, Haddam, Middlesex Co., Connecticut, USA
4.4km (2.7 miles) P Gillette Quarry (J-J Mine; Haddam Neck Quarry), Haddam Neck, Haddam, Middlesex Co., Connecticut, USA
5.0km (3.1 miles) Q Forest Ridge Road, Higganum, Haddam, Middlesex Co., Connecticut, USA
5.2km (3.2 miles) R Tidewater feldspar quarry, Haddam Neck, Haddam, Middlesex Co., Connecticut, USA
5.4km (3.3 miles) S Mt. Tom prospects, Moodus, East Haddam, Middlesex Co., Connecticut, USA
5.4km (3.4 miles) T feldspar quarry, Haddam Neck, Haddam, Middlesex Co., Connecticut, USA
5.8km (3.6 miles) U Haddam Volunteer Fire Station, Higganum, Haddam, Middlesex Co., Connecticut, USA
6.2km (3.9 miles) V Rock Landing Quarry (Capt. Rohrback Quarry), Haddam Neck, Haddam, Middlesex Co., Connecticut, USA
6.4km (4.0 miles) W Unnamed magnetite occurrences, Higganum, Haddam, Middlesex Co., Connecticut, USA
6.7km (4.2 miles) X amphibole-tourmaline-magnetite locality, Haddam Neck, Haddam, Middlesex Co., Connecticut, USA
7.1km (4.4 miles) Y Anderson No. 2 Mica Mine, East Hampton (Chatham), Middlesex Co., Connecticut, USA
7.1km (4.4 miles) Z Bailey prospect, East Hampton (Chatham), Middlesex Co., Connecticut, USA
7.1km (4.4 miles) 0 Anderson No. 1 Mica Mine (Swanson Mine; Swanson Lithia Mine), East Hampton (Chatham), Middlesex Co., Connecticut, USA
7.6km (4.7 miles) 1 Enegren Mica Mine (Power Mica Mine), East Hampton (Chatham), Middlesex Co., Connecticut, USA
8.1km (5.0 miles) 2 Hurd State Park quarries, East Hampton (Chatham), Middlesex Co., Connecticut, USA
8.7km (5.4 miles) 3 Worth and Selden Quarries (Victoria Quarry), East Hampton (Chatham), Middlesex Co., Connecticut, USA
8.8km (5.4 miles) 4 Eureka Quarry, East Hampton (Chatham), Middlesex Co., Connecticut, USA
9.3km (5.8 miles) 5 John Salak Quarry, Haddam, Middlesex Co., Connecticut, USA
9.4km (5.9 miles) 6 Slocum prospect, East Hampton (Chatham), Middlesex Co., Connecticut, USA
10.1km (6.3 miles) 7 Reeb Mica Quarry, Hog Hill, East Hampton (Chatham), Middlesex Co., Connecticut, USA
10.4km (6.5 miles) 8 Dripps Road, Middletown, Middlesex Co., Connecticut, USA
10.6km (6.6 miles) 9 Markham mica Quarry, Hog Hill, East Hampton (Chatham), Middlesex Co., Connecticut, USA
Mineral and/or Locality  
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