Blue zircon stud earrings. There are 2 round natural blue zircon set in 4 prongs that measures 3mm in size. Earrings are available in yellow, rose, and white gold; or platinum. Blue zircon is an alternative gemstone for December. Zircon is said to have healing energy that can promote balance between a person's physical, emotional and spiritual selves. It's believed people who have zircon can help a person's dreams become a reality.