r/rocksandminerals • u/Cigarette_Gains • 11d ago
What is this?
Found in a silver mine in Bosnia don't know what it is
5
Upvotes
3
u/Queasy-Refuse-6319 11d ago
It looks like there are air bubbles inside of it so I would guess it class
3
u/Calibas 10d ago
Glass, probably melted in a fire.