Tektite - Meteorite Impact Glass
Tektites are gravel-sized bodies composed of black, green, brown, or gray natural glass formed from terrestrial debris ejected during meteorite impacts. The term was coined by Austrian geologist Franz Eduard Suess, son of Eduard Suess. They generally range in size from millimeters to centimeters.
These tektites range in size from 15mm to 30mm and hand selected for quality, price is per each.