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Thirty-seven carats of round-cut diamonds — 37.71 ct total — run through this 14k two-tone gold opal diamond chain, pairing white diamond brilliance with the play-of-color depth only opal brings to a finished piece. The two-tone construction keeps the profile balanced: warm yellow gold grounds the setting while white gold accents sharpen the contrast between metal and stone. It crosses gender lines cleanly, wearing as confidently over a collar as it does layered against a neckline — browse the women's diamond necklace case to compare settings, stone weights, and metal combinations across the full range. Verified details include carat weight of 37.71 ct and stone of Opal and Diamond.