Roberto Coin 1.00ctw VS1-VS2/G-H Diamond, 20.5mm Faceted Onyx Solid 18K Rose Gold Cocktail Ring - This beautiful ring was made by Roberto Coin, and was finely crafted of solid 18k rose gold. This ring from Coin's "Cocktail" collection boasts a 20.5mm jet black onyx center stone which has stunning facet work that creates a sophisticated and radiant look. The ring is also embellished with approximately 1.00ctw VS1-VS2/G-H brilliant round cut diamonds surrounding the onyx, finishing the piece flawlessly. The ring is signed "Roberto Coin" on the inside of the band along with the gold purity, Italian register mark and Coin's signature inset ruby on the inside of the piece in direct contact with the skin of whom ever wears it. Coin signs each one of his pieces with this magical signature, which represents the message of good wishes that Roberto Coin dedicates to his clientele. Roberto Coin has designed some of the finest pieces of jewelry ever made, and the world of fashion recognizes him as the author of many of the most interesting trends in the jewelry world over the last decades. Each piece made by Roberto Coin is not only jewelry but a piece of art, and the brand is among the most renowned Italian jewelers and at the top of international studies on creativity and quality. The ring measures 24mm x 24mm across the top of the piece. Ring size: 7. (WEIGHT: 23.7 grams)