Donald A. Windsor
Around mid July 2012, NYSEG put in a new gas line under the lawn on the north side of the Golden Age Apartments on Mechanic Street in the City of Norwich.
On 25 July, I noticed a shiny black stone atop the back-filled ditch. Here are 2 photos of it. The upper photo is a top view and the lower is a side view.
The stone weighs 5 ounces. It looks like obsidian, but I suspect that it is slag, because this is the site of the former Maydole Hammer factory (1845-1970) and is about 80 feet from the railroad tracks.
I showed this to David Moyer and he identified it as slag before I told him where I found it. Gail Merian gave me a piece of real obsidian for comparison.