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

Locality type:Quarry
Classification
Species:Elbaite
Formula:Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Comments:Very dark, hard to tell from schorl, or as an overgrowth on it. On Halloween 2015 a miarolitic cavity was opened that contained terminated elbaite/schorl crystals to 15 cm enveloped by crystalline schernikite aggregates.
Habit:elongated prisms, mostly non-terminated. Crystals from miarolitic cavities show mostly trigonal pyramidal terminations (antilogous pole) with capillary parallel growth. A few show pedion terminations (analogous pole).
Colour:dark green prisms. Terminated crystals show lighter green near analogous pole, thin blue cap at the antilogous pole.
Quality for species:Good crystals or rich for species - important (!)
Abundance at site:Common
Confirmation
Validity:Believed Valid
References
References:Weber, Marcelle H. and Earle C. Sullivan. (1995): Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue): 70(6): 403.
Associated Minerals Based on Photo Data:
Microcline2 photos of Elbaite associated with Microcline at this locality.
Albite1 photo of Elbaite associated with Albite at this locality.
Data
Mineral Data:Click here to view Elbaite data
Locality Data:Click here to view Hewitt Gem Quarry (Herb's Gem Quarry; Sawmill Quarry), Haddam, Middlesex Co., Connecticut, USA
Photo GalleryView Gallery (15 photos)
Nearest other occurrences of Elbaite
4.1km (2.5 miles) Quarry Hill (Brainerd Quarries; Shailor Quarries), Haddam Neck, Haddam, Middlesex Co., Connecticut, USA
4.4km (2.7 miles) Gillette Quarry (J-J Mine; Haddam Neck Quarry), Haddam Neck, Haddam, Middlesex Co., Connecticut, USA
7.1km (4.4 miles) Anderson No. 1 Mica Mine (Swanson Mine; Swanson Lithia Mine), East Hampton (Chatham), Middlesex Co., Connecticut, USA
8.8km (5.4 miles) Eureka Quarry, East Hampton (Chatham), Middlesex Co., Connecticut, USA
13.5km (8.4 miles) White Rocks Quarry (Consolidated Quarry), White Rock Mining District, Middletown, Middlesex Co., Connecticut, USA
14.0km (8.7 miles) Riverside Quarry (Western Quarry), White Rock Mining District, Middletown, Middlesex Co., Connecticut, USA
16.9km (10.5 miles) Strickland Quarry (Eureka Quarry), Strickland pegmatite (Strickland-Cramer Quarry; Strickland-Cramer Mine; Strickland-Cramer Feldspar-Mica Quarries), Collins Hill, Portland, Middlesex Co., Connecticut, USA
17.0km (10.6 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
19.8km (12.3 miles) Walden Gem Quarry, Portland, Middlesex Co., Connecticut, USA
21.8km (13.5 miles) Simpson Quarry (Wiarda Quarry), South Glastonbury, Glastonbury, Hartford Co., Connecticut, USA
 
Mineral and/or Locality  
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