This geuine Ancient Roman jasper intaglio has beem set in a modern 18 karat gold ring.

The art of glyptics, or carving on colored precious stones, is probably one of the oldest known to humanity. Intaglios, gems with an incised design, were made as early as the fourth and third millennia BC in Mesopotamia and the Aegean Islands. They display a virtuosity of execution that suggests an old and stable tradition rooted in the earliest centuries. The tools required for carving gems were simple: a wheel with a belt-drive and a set of drills. Abrasives were necessary since the minerals used were too hard for a "metal edge. A special difficulty of engraving intaglios, aside from their miniature size, was that the master had to work with a mirror-image in mind.
Gods and goddesses were favorite themes of ancient and Renaissance artists, due to their physical beauty and frequent amorous adventures. Some deities, however, were invoked to aid in the problems of daily life, often in the realm of business. Fortuna (Greek Tyche) was much revered, appearing on coins as a form of talisman, and on jewelry. On this handsome intaglio she is seen standing holding her famous cornucopia in the left hand, and a rudder in the right, since she was supposed to guide people's lives. Across from her is the lithe and nimble god Hermes wearing his petasos, (traveler's hat), and holding a caduceus. These two charming figures were bath connected with commerce, and also responsible for guiding voyagers on a safe passage. In this role Fortuna was known as Redux. Though not directly connected in ancient mythology, they certainly make a delightful pair, and doubly powerful in bringing good fortune.