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PhotosBeryl - Mansfield Hollow Dam, Windham, Windham Co., Connecticut, USA

2nd Sep 2015 02:53 UTCFred A. Schuster

Beryl, Quartz, Microcline, Albite, Fluorite

Mansfield Hollow Dam, Windham, Windham County, Connecticut, USA

Harold,

I don't know if you are aware that I collected this piece and later sold it to mr Miller. Please note that I found it.

Thanks

Fred

3rd Sep 2015 23:04 UTCAdam Kelly

Fred, that is a very cool piece that you found.

Was there any more found?

A friend of mine has a house on Mansfield Hollow, and I've spent alot of time there.

I would be very interested in a piece, if any become available.

Thanks,

Adam Kelly

16th Feb 2016 18:44 UTCHarold Moritz 🌟 Expert

Hi Fred:

Just found your comment when I saw the recent discussion. Yes, I did get it from Don Miller and normally, for privacy reasons, I dont mention previous owners/finders unless they tell me it's OK. So now that you have, I will! These Eastern Connecticut specimens are very important, if not the greatest, because there are not many, besides the pegmatite, staurolite, garnet and quartz localities. There are old American Journal of Science articles on blue beryl from pegmatites in Willimantic, which are now long gone or inaccessible. Was this found in-situ or was it a loose rock? Do you know where the cover rock for the dam was obtained. I think the bulk of it is sand/gravel.

Fritz

24th Feb 2016 14:43 UTCFred A. Schuster

Fritz

First of all thank you for the recognition. The piece was found about 1990 on the pricipal dam facing route 6 and the Windham airport. The dam was built in Mansfield Hollow and it was all rock. I was trying to find historical evidence of where this rock came from. It was probably built by the army corp of engineers but where did they blast this rock? there was other things of interest on the dam too, such as biotite, black pyroxene and calcite, also pyrhottite. This piece was just laying there on the top and was a lucky find. I did not see any more, not saying there isn't any more to find, but you can see it was a narrow (2"?) seam of pegmatite.

Fred

25th Feb 2016 04:02 UTCHarold Moritz 🌟 Expert

Wikipedia has pages on many USACOE projects, with varying degrees of detail. It doesnt say where they got the rock, but it likely just has it on the surface, like the much larger Thomaston Dam, which is mostly sand.

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