Seven-millimeter round black jadeite 18K yellow gold over sterling silver earrings measuring approximately 1.06 inches long by 0.37 inches wide with leverback backings - the black jadeite earring where the rare black color variety of jadeite creates a dark, lustrous presence in warm gold. Black jadeite is one of the rarest jadeite color varieties, its deep black with subtle translucency creating a material character that differs fundamentally from black onyx or spinel. Leverback backings. Warm gold creates high contrast with the black stone.