18ct yellow gold diamond blue enamel house style butterfly stud earrings e2216 the embodiment of luxury these butterfly earrings arefashioned from the finest 18ct yellow goldand embellished with sparkling diamonds the blue wings are vitreous enamelled in theplique a jour style french for letting in daylight a technique where the enamel is applied with no backing so that light can shine through giving a translucent lifelike effect they are completed by post and butterfly stud fasteni