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Elbaite from
Strickland Quarry (Eureka Quarry), Strickland pegmatite (Strickland-Cramer Quarry; Strickland-Cramer Mine; Strickland-Cramer Feldspar-Mica Quarries), Collins Hill, Portland, Middlesex Co., Connecticut, USA

Locality type:Quarry
Classification
Species:Elbaite
Formula:Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Comments:Mostly subhedral, shattered crystals in matrix but several crystal-rich pockets are described in the literature. Crystals common in late-stage vuggy cleavelandite with tan, high-K albite, quartz, pyrite, mica, cookeite, micas, etc. Most crystals grass green throughout, usually poorly terminated in cookeite or albite, may show pedion or shallow rhomb or grade into parallel asbestiform crystals. Crystals generally concentrically rather than longitudinally color zoned. Green and blue-green overgrowths (these may be foitite) on schorl common or concentrically zoned with very dark blue-green core, grass green intermediate zone and olive green outer zone. Smaller crystals can be pure bright pink, these are commonly etched. Pastel colored crystals can be watermelon zoned (some pink cores fluoresce blue) or almost blue-gray and lavender-gray to colorless. A blue-gray alteration is common in fractures through the lavender crystals.
Habit:elongated prisms
Colour:olive to grass green; blue-green; bright pink; pastel green, pink (watermelon), blue and gray to colorless
Luminescent properties:blue
Quality for species:Good crystals or rich for species - important (!)
Abundance at site:Common
Confirmation
Validity:Believed Valid
References
References:Bastin, Edson S. (1910): Economic Geology of the Feldspar Deposits of the United States. United States Geological Survey Bulletin 420, Government Printing Office.; Sterrett, Douglas B. (1923), Mica Deposits Of The United States, USGS Bulletin 740: 65-67.; Shannon, Earl V. (1920): Strickland's Quarry, Portland, Connecticut. American Mineralogist: 5(3): 51-54.; Stearns, H. T. (1983): Memoirs of a Geologist: From Poverty Peak to Piggery Gulch. Hawaii Institute of Geophysics, Honolulu.; Schooner, Richard. (1955): 90 Minerals from 1 Connecticut Hill. Rocks & Minerals: 30(7-8): 351-8.; Cameron, Eugene N., Larrabee, David M., McNair, Andrew H., Page, James T., Stewart, Glenn W., and Shainin, Vincent E. (1945), Structural And Economic Characteristics Of New England Mica Deposits. Economic Geology: 11(6): 378-380.

Bastin (1910), Shannon (1920), Sterrett (1923), and Stearns (1983)
Associated Minerals Based on Photo Data:
Albite12 photos of Elbaite associated with Albite at this locality.
Cookeite6 photos of Elbaite associated with Cookeite at this locality.
Cleavelandite5 photos of Elbaite associated with Cleavelandite at this locality.
Lepidolite4 photos of Elbaite associated with Lepidolite at this locality.
Quartz3 photos of Elbaite associated with Quartz at this locality.
Almandine3 photos of Elbaite associated with Almandine at this locality.
Muscovite2 photos of Elbaite associated with Muscovite at this locality.
Smoky Quartz2 photos of Elbaite associated with Smoky Quartz at this locality.
Wodginite2 photos of Elbaite associated with Wodginite at this locality.
Pyrite2 photos of Elbaite associated with Pyrite at this locality.
Data
Mineral Data:Click here to view Elbaite data
Locality Data:Click here to view Strickland Quarry (Eureka Quarry), Strickland pegmatite (Strickland-Cramer Quarry; Strickland-Cramer Mine; Strickland-Cramer Feldspar-Mica Quarries), Collins Hill, Portland, Middlesex Co., Connecticut, USA
Photo GalleryView Gallery (42 photos)
Nearest other occurrences of Elbaite
0.1km (0.1 miles) Schoonmaker Mine (Cramer Mine), Strickland pegmatite (Strickland-Cramer Quarry; Strickland-Cramer Mine; Strickland-Cramer Feldspar-Mica Quarries), Collins Hill, Portland, Middlesex Co., Connecticut, USA
3.0km (1.9 miles) Walden Gem Quarry, Portland, Middlesex Co., Connecticut, USA
4.0km (2.5 miles) Riverside Quarry (Western Quarry), White Rock Mining District, Middletown, Middlesex Co., Connecticut, USA
4.3km (2.7 miles) White Rocks Quarry (Consolidated Quarry), White Rock Mining District, Middletown, Middlesex Co., Connecticut, USA
5.1km (3.2 miles) Simpson Quarry (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
8.5km (5.3 miles) Eureka Quarry, East Hampton (Chatham), Middlesex Co., Connecticut, USA
9.0km (5.6 miles) Brack Gem prospect (Brack prospect), East Glastonbury, Glastonbury, Hartford Co., Connecticut, USA
10.2km (6.4 miles) Anderson No. 1 Mica Mine (Swanson Mine; Swanson Lithia Mine), East Hampton (Chatham), Middlesex Co., Connecticut, USA
13.0km (8.1 miles) Gillette Quarry (J-J Mine; Haddam Neck Quarry), Haddam Neck, Haddam, Middlesex Co., Connecticut, USA
 
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