Heirloom heavy sterling silver rainbow pendant with 925 chain. See photos for details . Great Gift for the colorful people in your life 🌈 Make sure to check out the rainbow 🌈 bracelet and rings in my closet too! 🔶 This piece of jewelry has been lightly cleaned with a ultrasonic cleaner by Magnasonic it may still need polishing and additional cleaning when listed as Heirloom Estate Vintage item🔹Selling AS-IS no returns 🔶 Bundle for additional discount 🔶 GA53GW 🔶💎💍 Education: Cubic zirconia (CZ) is the cubic crystalline form of zirconium dioxide (ZrO2). The synthesized material is hard and usually colorless, but may be made in a variety of different colors. It should not be confused with zircon, which is a zirconium silicate (ZrSiO4). It is sometimes erroneously called cubic zirconium. 🔶💎💍 Because of its low cost, durability, and close visual likeness to diamond, synthetic cubic zirconia has remained the most gemologically and economically important competitor for diamonds since commercial production began in 1976. Its main competitor as a synthetic gemstone is a more recently cultivated material, synthetic moissanite. 🔶💎💍