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Microcline from
Spinelli prospect (Spinelli quarry), Glastonbury, Hartford Co., Connecticut, USA

Locality type:Prospect
Classification
Species:Microcline
Formula:K(AlSi3O8)
Comments:good crystals very uncommon, up to 8 cm, mostly massive, can be brick red, perhaps due to hematite from iron leached from associated colmubite-(Fe) and samarskite-(Y) crystals
Habit:anhedral, rarely subhedral
Colour:white, pale pink to red
Luminescent properties:red
Quality for species:Poor for species, only of interest for locality collectors. (#)
Abundance at site:Extremely common
Confirmation
Validity:Believed Valid
References
References:Januzzi, 1976. Mineral Localities of CT and Southeastern NY State; USGS Prof Paper 255; Rocks & Minerals (1995) 70:396-409; - Davis, Fred E. and Stefan Nicolescu. (2011): Samarskite Rediscovered at the Spinelli Prospect, Glastonbury, Connecticut. Bulletin of the Peabody Museum of Natural History: 52(1):135-152.
Associated Minerals Based on Photo Data:
Albite2 photos of Microcline associated with Albite at this locality.
Data
Mineral Data:Click here to view Microcline data
Locality Data:Click here to view Spinelli prospect (Spinelli quarry), Glastonbury, Hartford Co., Connecticut, USA
Photo GalleryView Gallery (2 photos)
Nearest other occurrences of Microcline
1.1km (0.7 miles) Paxton Way, Glastonbury, Hartford Co., Connecticut, USA
1.2km (0.7 miles) East Glastonbury Quarry (Curtis Quarry), East Glastonbury, Glastonbury, Hartford Co., Connecticut, USA
4.4km (2.7 miles) Chamberlain Lane, South Glastonbury, Glastonbury, Hartford Co., Connecticut, USA
4.6km (2.8 miles) Roaring Brook Quarry, South Glastonbury, Glastonbury, Hartford Co., Connecticut, USA
4.6km (2.9 miles) Brack Gem prospect (Brack prospect), East Glastonbury, Glastonbury, Hartford Co., Connecticut, USA
5.2km (3.2 miles) John C. Wiarda Quarry, South Glastonbury, Glastonbury, Hartford Co., Connecticut, USA
5.6km (3.5 miles) Hollister prospects (Hollister Quarry), South Glastonbury, Glastonbury, Hartford Co., Connecticut, USA
5.7km (3.5 miles) Husband Quarry, South Glastonbury, Glastonbury, Hartford Co., Connecticut, USA
6.0km (3.7 miles) Griswold Quarry, South Glastonbury, Glastonbury, Hartford Co., Connecticut, USA
6.0km (3.7 miles) Howe #4 Quarry and Eureka Quarries, South Glastonbury, Glastonbury, Hartford Co., Connecticut, USA
 
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