925 sterling silver dipped in 22ct gold, hand set micro paved turquoise cubic zirconia, butterfly fastening. This is lab created gemstone that simulates diamonds with a turquoise colure this is not true turquoise but still a beautiful earring. The lab created cubic zirconia is a beautiful and durable lab made gemstone that is often used as its easy to work with and has good durability whilst retaining allot of the same beautiful characteristics as some more delicate natural gemstone.