This exquisite ladies 18kt yellow gold diamond necklace centers upon (1) genuine oval BLACK OPAL. This opal has a deep blue/green color and has fabulous quality. The opal weighs approx. 15 carats and is surrounded by (100) round brilliant full cut diamonds all matching in color and clarity, having a total diamond weight of approx. 2 1/2 carats. This necklace is one of a kind and extraordinary!!! There are matching black opal earrings that can be viewed on this site item # 2811b1870. SHEER ELEGANCE!!!!