This birthstone necklace will become the center of your universe the minute you lay eyes on it. Surrounded by your choice of beautiful 14K yellow or white gold, the bezel-set gemstone is the focal point of this piece. The 18-inch chain is so delicate that you can barely see it. Instead, the gemstone of your choice appears to float just above your collarbone. Ruby, Emerald, Blue Sapphire and Alexandrite stones are lab grown.