About Costa D'Oro

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For generations, Kosta Vrahnos has believed that jewelry is more than ornament — it is memory made visible. Through his masterful custom creations and thoughtful redesigns, he gives new life to treasured pieces and helps stories continue across time. His brand, Costa D’Oro, has earned global respect and devotion, not through trend or spectacle, but through the quiet integrity of true craftsmanship.

From his atelier in Detroit, Kosta offers a highly curated collection of exclusive, timeless pieces — each one designed to inspire, to celebrate, and to hold meaning. His artistry reflects the elegance of the old world and the sophistication of the modern one.

A certified gemologist and master goldsmith, Kosta elevates the ancient craft of shaping gold and precious stones into something deeply personal. He works with devotion and precision — forging, casting, setting, and polishing diamonds, gemstones, and metals with a skill honed over decades. Every piece that leaves his bench carries the imprint of his hand, his eye, and his heart.

Whether you are seeking an engagement ring, a piece to mark a milestone, or something simply to bring beauty into your everyday life, Kosta creates jewelry that is meant to be cherished — and remembered. His collection reflects a rare understanding: that the most meaningful adornments are the ones that make us feel seen, loved, and connected.

Costa D’Oro is not simply jewelry.