Roberto CoinLetter Medallion NecklaceDetailsPave white diamonds spell a letter of your choosing, approx. 1/2 diameter. Dainty, 18-karat yellow gold rolo chain, approx. 18L. Total carat weights vary by letter. 0. 03 total carat weight for T, L, I, F. 0. 04 for Y, V, Q, P, K, J, E, C, A. 0. 05 for Z, X, W, U, S, R, N, M, H, G, D, B. 0. 06 for O. Lobster clasp. Made in Italy. Designer About Roberto Coin:Since founding his own company in 1977, Roberto Coin has rightfully gained fame as a tireless innovator, most notably for pioneering the use of three-color gold in 1978. His jewelry seems to capture the fluidity of his amphibious hometown, Venice-forms and shapes meld, creating a sense of wholeness, the distinction between the timeless and the modern ever-blurred. Perpetually reinventing his personal style, Roberto Coin produces more than 600 unique jewelry models annually. Each piece includes a hidden 0. 3 carat ruby, a signature of the designer.