WesternPA-collector
Well-Known Member
I was wondering if anyone collects or looks for glass slag/cullet rocks, which are the remnants of glass that hardened inside furnaces and are often found near old glass factories. Rounded pieces of glass resembling river rocks can also be found in waterways if you look very carefully. Here is an example of a piece I have. Backlit with an LED light. This came from a creek bed, and I almost missed it.