Originally Posted by VeraBlue
It was fun looking, though. What else is at the bottom of that lake, I wonder
Trust me, you don't want to know. One of my hobbies is using a metal detector, and I have one that's completely waterproof. You name, I've found it, on the lake bottom, IN SWIMMING AREAS. I refuse to go into the water barefoot. You should see the piece of cardboard I have that I've glued all sorts of sharp, jagged, objects to.
Years ago, people would toss many trash items out into a lake, like bottles, cans, etc. I've even heard of some bottle hunters that are certified divers going into lakes, near old docks, looking for old bottles.
If they've been on the lake bottom, they might not have been exposed to enough sunlight to turn them purple.
Something to look for with old bottles, is the seam where the halves of the mold would have met. If you can't find one, this the bottle was blown, probably by hand. Look for a "pontil", a crimp-like marking where the glass was attached to the wand that the artist blew into.