What Could That Be? in Rocks, Minerals, Gems & Geology Posted October 8, 2023 I was thinking obsidian (volcanic glass) but I thought obsidian was grey/black and that looks brownish in the pictures. Do you have a banana for scale? How big is it?
What Could That Be?
in Rocks, Minerals, Gems & Geology
Posted
I was thinking obsidian (volcanic glass) but I thought obsidian was grey/black and that looks brownish in the pictures. Do you have a banana for scale? How big is it?