18K gold electroplating for longer color retention time. Main stone: AAA+ Micro Round Cut Cubic Zirconia. Material: Brass/Copper. Function: Accessories for DIY Earrings Jewelry Making. Environmental Standard: Lead Nickel Cadmium Free. Factory: Yes, Support Drop Shipping and Wholesale. All items are wholesale price. The more you buy, the more discount you will get. Guarantee: Color will not change into black, red, or brown within 1-2 years. Products can be customized.