Goldbug Collection’s Birthstone Drop Earrings feature an emerald-cut CZ crystal drop with a bezel-set colored CZ accent. 18K Gold-Plated Brass, CZ Crystals Length: 0.5" Care: To ensure a longer life for your Goldbug pieces, please do not shower, swim, or sleep while wearing them, and keep them away from sunscreens, lotions, and perfumes. To clean your pieces, rinse with warm water and gentle soap. Like our bug friends, sadly, costume jewelry doesn't live forever!