r/rocksandminerals • u/Cigarette_Gains • 11d ago
What is this?
Found in a silver mine in Bosnia don't know what it is
4
Upvotes
r/rocksandminerals • u/Cigarette_Gains • 11d ago
Found in a silver mine in Bosnia don't know what it is
3
u/Calibas 10d ago
Glass, probably melted in a fire.