David Yurman 18k yellow gold 13mm elements swivel ring with Black Onyx and Mother of Pearl backed with White Agate, diamonds weigh .05cts size 7 18-karat Yellow Gold Black Onyx and Mother of Pearl backed with White Agate, Pavé Diamonds, 0.05 total carat weight, Ring, 15mm This ring is interchangable and can be worn 2 different ways. Disc can swivel so either ring can be worn with either side of stone facing up Size 7 Designers Jewelry Collection, White Agate, Elegant Ring, Pearl Diamond, High Jewelry, David Yurman, How To Make Ornaments, Pave Diamonds, Black Onyx