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Emerald from
Old Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA


Locality type:Construction Site
Classification
Species:Beryl var: Emerald
Formula:Be3Al2(Si6O18)
Formation:Secondary
Comments:Crystals were found at the contact zone between high-temparature hydrothermal vein of mostly calcite and host metasomatically altered amphibolite. The contact zone consists of quartz/marialite/albite/beryl/pyrrhotite. Claims have been made that this locality has had an analysis showing a chromium value, but no published analyses. Crystals vary widely in color, from pale to emerald green to bluish green (as do emerald crystals at other localities). The hydrothermal, contact zone geo-environment and assemblage is typical of many other emerald localities.
Habit:elongated prisms
Colour:pale to emerald green to bluish green
Abundance at site:Common
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Emerald data
Locality Data:Click here to view Old Mine Plaza construction site, Long Hill, Trumbull, Fairfield County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:418473
Long-form Identifier:1:3:418473:7
GUID (UUID V4):0
References
 
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