Vintage H. Stern Amethyst Ring 18k Yellow Gold, 12.65ct

This ring carries the stamped "S" logo and 750 fineness mark associated with H. Stern, the Rio de Janeiro house renowned since the mid-twentieth century for pairing richly colored Brazilian gemstones with sculptural, hand-finished goldwork. The hallmark sits cleanly on the interior shank, consistent with the house's standard practice of marking both maker and metal content on its gold pieces.

The amethyst itself is a deep, saturated purple with strong color zoning visible under raking light, faceted in a traditional oval mixed cut that throws broad, even flashes across the table. Eye-clean to the naked eye, the stone reads dark and velvety in its upper half and opens to lighter violet tones near the culet, giving the face-up view real depth rather than a flat, uniform purple.

What sets this piece apart is the bezel treatment: rather than a smooth rim, the gold is built up from tightly coiled rope-twist wire wound in parallel courses around the entire perimeter of the stone, with a polished gold ball accent at each shoulder where the shank curls upward into the coiled bezel. The reverse is left open in a pierced gallery, allowing light to pass through the pavilion and brighten the stone from behind, a detail that also lightens the overall feel of what is otherwise a substantial, dimensional ring. The stone itself is held by a six-prong basket integrated into the coiled framework, distinct from the decorative ball elements at the shoulders.

At nearly 9 grams of 18k gold and centered on a stone of real size and presence, this is a ring meant to be noticed on the hand, combining H. Stern's textural signature with an amethyst that holds its own against the goldwork surrounding it.