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Lyman Viaduct at Dickinson Creek, Westchester, Colchester, New London Co., Connecticut, USA
Photo: 2011 Harold Moritz
Connecticut's only authenticated diamond (0.8mm cubic grey crystal) was found during analyses of garnet sands from here in the late 1960s.
WARNINGS: Mineral collecting in Connecticut state forests is not allowed without a permit. This locality is patrolled because of prohibited swimming and diving but collectors have also been ticketed for panning. Beware of broken glass in the alluvium. Note that some constituents of the alluvium may be derived from the sand and slag used to fill in the viaduct and might not be native to the area.
Mineral List
| Almandine 'Amphibole Group' | Biotite Diamond | | Quartz Staurolite |
8 entries listed. 4 valid minerals. 2 erroneous literature entries.
The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders
for access and that you are aware of all safety precautions necessary.
References
Jarnot, Bruce and Jarnot, Miranda (2004): "Gem Almandine from Colchester, Connecticut," in: abstracts of the 31st Rochester Mineralogical Symposium, April 15-18, 2004, pp 13-14.
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