Rainbow glass studs. They have a clear frit base, on top of that are layered rainbow flakes. These flakes are made from layers of glass which are melted into a single glass tile. The tile is then smashed with a hammer and the resulting small rainbow pieces are used in the studs. Then a little clear dichroic glass is added for sparkle, and it all looks magical! No two earrings are ever the same, just close! The posts and butterflies are solid sterling silver.