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Beryl from
Case Prospect No. 4, Case Quarries, Portland, Middlesex County, Connecticut, USA


00108220017392992269194.jpg
Beryl

Case Prospect No. 4, Case Quarries, Portland, Middlesex County, Connecticut, USA
01004170017391135404722.jpg
Beryl, etc.

Case Prospect No. 4, Case Quarries, Portland, Middlesex County, Connecticut, USA
06193170017390583488392.jpg
Beryl

Case Prospect No. 4, Case Quarries, Portland, Middlesex County, Connecticut, USA
01976520017390569379696.jpg
Beryl, etc.

Case Prospect No. 4, Case Quarries, Portland, Middlesex County, Connecticut, USA
00733270017392975815693.jpg
Beryl

Case Prospect No. 4, Case Quarries, Portland, Middlesex County, Connecticut, USA
04133880017391135365678.jpg
Beryl, etc.

Case Prospect No. 4, Case Quarries, Portland, Middlesex County, Connecticut, USA
01766980017390572212303.jpg
Beryl

Case Prospect No. 4, Case Quarries, Portland, Middlesex County, Connecticut, USA
03821480017390567647354.jpg
Beryl, etc.

Case Prospect No. 4, Case Quarries, Portland, Middlesex County, Connecticut, USA
00108220017392992269194.jpg
Beryl

Case Prospect No. 4, Case Quarries, Portland, Middlesex County, Connecticut, USA
06842650017393026743107.jpg
Beryl, etc.

Case Prospect No. 4, Case Quarries, Portland, Middlesex County, Connecticut, USA
06193170017390583488392.jpg
Beryl

Case Prospect No. 4, Case Quarries, Portland, Middlesex County, Connecticut, USA
01976520017390569379696.jpg
Beryl, etc.

Case Prospect No. 4, Case Quarries, Portland, Middlesex County, Connecticut, USA
Locality type:Prospect
Classification
Species:Beryl
Formula:Be3Al2(Si6O18)
Formation:Primary
Comments:Crystals weighing over 22 kilograms and 15 centimeters across, clusters of crystals to 7 centimeters across also found. The beryl crystals are arranged with their long axes roughly perpendicular to the zone contacts. The growth is tapered - it started in the wall zone and formed subhedral crystals of increasing diameter in the intermediate zone. If they reached the quartz core they formed short euhedral hexagonal prisms with pinacoid terminations. Dozens of molds of these can be seen in the quartz core in the prospect trench.
Habit:hexagonal prisms with pinacoid terminations
Colour:blue-green to blue
Quality for species:Good crystals or rich for species - important (!)
Abundance at site:Common
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Associated Minerals Based on Photo Data:
Albite13
Quartz12
Microcline6
Data
Mineral Data:Click here to view Beryl data
Locality Data:Click here to view Case Prospect No. 4, Case Quarries, Portland, Middlesex County, Connecticut, USA
Photo GalleryView Gallery (29 photos)
Data Identifiers
Mindat Occurrence Record ID:1689328
Long-form Identifier:1:3:1689328:9
GUID (UUID V4):0
Nearest other occurrences of Beryl
0.1km (0.0 miles) ⓘCase Quarry No. 1, Case Quarries, Portland, Middlesex County, Connecticut, USA
0.1km (0.0 miles) ⓘCase Quarries, Portland, Middlesex County, Connecticut, USA
0.1km (0.0 miles) ⓘCase Quarry No. 2, Case Quarries, Portland, Middlesex County, Connecticut, USA
0.1km (0.1 miles) ⓘCase Quarry No. 3, Case Quarries, Portland, Middlesex County, Connecticut, USA
0.8km (0.5 miles) ⓘAppletree Lane, Portland, Middlesex County, Connecticut, USA
1.4km (0.8 miles) ⓘGotta-Walden Prospect, Portland, Middlesex County, Connecticut, USA
1.4km (0.9 miles) ⓘBordonaro Quarry, Portland, Middlesex County, Connecticut, USA
1.5km (1.0 miles) ⓘHale Quarry (Andrews Quarry; Glastonbury Quarry), Portland, Middlesex County, Connecticut, USA
1.5km (1.0 miles) ⓘWalden Gem Quarry, Portland, Middlesex County, Connecticut, USA
1.8km (1.1 miles) ⓘAndrews Quarry (old Hale Quarry; Grandfather Andrews Quarry), Portland, Middlesex County, Connecticut, USA
References
Cross, L. M. (1987), A New Occurrence of Beryl at Case Quarries, Portland, Connecticut. Rocks & Minerals: 62(2): 116-7.
 
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