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O & G Southbury Quarry (Silliman Quarry; O & G No. 2 Quarry), Southbury, New Haven Co., Connecticut, USA

Prehnite
O & G Southbury Quarry, Southbury, New Haven Co., Connecticut, USA

Photo: 2001 John H. Betts

Latitude: 41°30'50"N
Longitude: 73°12'58"W

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Note, the entrance road to this quarry is on State Route 67 in Southbury, however the quarry starts about 0.5 mile north of the entrance road and the vast majority of it is mostly in Woodbury. Because O & G operates another quarry farther north in Woodbury (O & G No. 1 or the "Woodbury" Quarry), this locality has almost universally been referred to as the "Southbury" Quarry to differentiate it, even though it too is technically in Woodbury.

Well known Connecticut locality for prehnite. Three varieties are found - the standard green, rare yellow prehnite, and the extremely rare white prehnite that is almost completely free of iron impurities. The locality is also known for gemmy green sphalerite crystals to about 6mm, plus calcite, agate, apophyllite, and zeolites.

Mineral List

23 entries listed. 16 valid minerals.

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References

Vajdak, Josef. (1998): New Mineral Finds in the Second Half of 1997, News from Josef Vajdak of Pequa Rare Minerals and Metals. Mineral News: 14(1): 4.

Weber, Marcelle H. and Earle C. Sullivan. (1995): Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue): 70(6): 407.

Moore, Thomas. (2007): What's New in Minerals. Mineralogical Record: 38(3): 214.

External Links

www.johnbetts-fineminerals.com/jhbnyc/mineralmuseum

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Copyright © Jolyon Ralph and Ida Chau 1993-2013. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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