1950s 0.25 Carat Old Mine Diamond 12K White Gold Dome Ring Florentine Finish

Before machine finishing became the industry standard, craftsmen hand-etched fine jewelry with crosshatch tools to create the Florentine finish — a matte, velvety texture that catches light differently than any modern polish. This ring is a quiet showcase of that lost art.

At the center, a 0.25 carat old mine cut diamond — the predecessor to the modern round brilliant, known for its warm, romantic light return — sits in a four-prong tension setting with extended bar prongs, perfectly proportioned against the domed surface.