Vintage glass, silver wire. This bead has a small scratch/flaw on one side - I tried to get it to show up in the photos, but mostly just succeeded in showing off the color inside it and/or my nailpolish (India by Zoya, from the 2014 Fall collection, converted to LED gel with the Sensationail kit which is MAGIC I TELL YOU but I digress a whole lot) so just know that it isn't perfect but it's a really awesome one-of-a-kind bead that I picked up off the floor of that place in NYC where I go digging for treasures.