"Ancient Roman Glass" 18" Pendant Necklace - 2,000-Year-Old, Ancient Roman Glass & Sterling Amulet on an 18" Sterling Modified Snake Chain (It's smooth & doesn't kink!).
The iridescence is caused by being under the earth for thousands of years - it's mineral deposits! So, it's best not to get these wet - of course, that's true for all jewelry! :)
