Vintage Black glass hand knotted bracelet

Vintage Black glass hand knotted bracelet. 8mm black glass round beads. measures 6" dia. weighs 13gr. This is a description to the best of my knowledge, I am not expert. Please take a good look at pictures and buy at your own risk. I test metals with acid and stones with presidium tester. I do not clean thru the pieces but the bare minimum to see any flaws and/or marks.