Margarita: 10mm Kiwi Green Synthetic Opal Ball Stud Post Earrings 14K White GoldCategory: 10 Mm Pave BallMargarita: Our Australian Kiwi Green Opal ball studs are always a popular choice (also referred to as Kelly Green opals). The beautiful and vibrant mid green tones accented by flashes of brighter greens, yellows, oranges, blues and whites make these a gorgeous accent choice for a variety of colors, styles and designs. Mounted on solid 14K White Gold posts, they're a gorgeous addition to any jewelry collection and make an ideal gift for those with an October birth date.Many people are not aware that created Opal is actually preferred to natural opal for most jewelry items. Natural Opal is not particularly well-suited to being used in jewelry since it's a relatively soft gemstone, is subject to chipping and breakage, requires regular care and maintenance, and has to be protected from sunlight and many chemicals and contaminants such as hair spray, perfumes and the like. That's why much of the jewelry made with natural Opal are actually created doublets and triplets (Opal mounted to a resin base and then clear-coated to protect it).