Ring in 18-carat yellow gold, set with a round faceted sapphire in a bezel setting, at the center of a two-tone tubular construction. The setting, highlighted by a white gold or platinum rim, is flanked by two decorative rings also in white metal, emphasizing the contrast of materials.

The composition reveals a modernist aesthetic, typical of late 20th-century jewelry production (circa 1980–2000), marked by a taste for sober geometry, balanced volumes, and the opposition of yellow gold / white gold tones. The influence of industrial design is evident, with a rigor in the lines and a rejection of superfluous ornamentation.

The band features a central tubular decoration with two parallel threads, punctuated by two lateral motifs set with white metal rings. This treatment suggests a technical or architectural inspiration, in a modern, even slightly neo-Art Deco style.

The band is thin but structured, formed by two wires welded onto a solid base. The metal treatment and the symmetrical arrangement of the elements suggest meticulous craftsmanship, likely from a French or European jeweler, halfway between artisanal creation and small-batch production.

This ring follows in the tradition of post-modernist jewelry, where the precious stone is integrated as an element of balance rather than a simple dominant central ornament.