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reply to post by SixX18
I'm in PA also & we found some of this when we were kids.
Way out in the woods near a stream fed, small lake.
A piece was sticking out of the ground & we dug & found quite a bit more.
Older people told us it was glass slag. We wondered how it got there too!
The only glass plant in recent memory was about an hour away!
They said the air bubbles inside it were one way you could tell.
We didn't find anything very large, but a couple of people in our town,
have big chunks of it decorating their front yards.
I always wanted to knock on the door & ask them if they found it in the same place.
I was surprised it never got stolen! Their house is real close to the road in town.
What we found was varying shades of green like glass Coke bottles used to be made of.
The other people have clear, green & a cobalt blue, the color of old time medicine bottles.
My sister found a bright yellow piece at a yard sale once.
Some of it looks dirty in spots on the outside,
like it was dumped on the ground when it was still molten, & the glass fused to the dirt.
Some have pits on the outside, like air bubbles burst on the surface.
The weird part is, there are no sharp places except the little pits themselves!
Even the edges of the big flat surfaces, that look broken, aren't sharp.
One of life's little mysteries!!!
Neat to see something about this after at least 50 years!
I'll be interested to see if anyone knows more about it!
SprocketUK One thing worth doing is to weigh it as accurately as possible, then find the volume by immersing it in a full container of water, measuring the water displaced ti get the volume, then divide weight/volume to get the density. Google the density and it ought to confirm the material the lump is made from.
Not the most stringent of tests, but it can rule out some of the more exotic claims ...or even rule them in.
now wait wait wait, just hold on here a second.....
you guys are in PA and drinking Bud? Your in Yuengling country, fool!
If that is the case, then how did it get there, and why are there possibly more of these near a sulfur creek bed that originates from a cave? Not saying it is not slag, because they look very much the same. Just can't rule out that it isn't natural, and what else it could be.
I have piece about 1/4 that size, but very green. It was called "End of the day glass" from a glass factory that would be I guess what was leftover at the end of the day.
reply to post by gariac
Shine a UV flashlight on it. It if glows green, you have uranium glass.
I can tell just by looking at it it's not uranium glass.