Lustern Child's "pearl" and gold necklace. It is marked on the closure link. I can see 12K. I believe it is probably 12K filled gold. Lustern produced many pieces of 1/20th 12k gold filled on sterling. I think that this piece is the same. I found this little treasure in Seattle with its original Lustern gift card and box. The top is missing. It was probably a clear plastic-type cover—6" long. The box with the card is 3" X 2". Lustern history is approx. from the 1920s - 1950s.