The Helm & Hahn co. 10K Yellow Gold Onyx Ring with Diamond is a vintage piece of fine jewelry that exudes elegance and style. Featuring a striking black onyx stone set in yellow gold, this ring is accented with a single diamond for a touch of luxury. With a unique bezel setting and a resizable shank, it offers a comfortable and secure fit for the wearer. The brand's reputation for quality craftsmanship ensures that this ring is not only stylish but also a timeless addition to any jewelry collection.