Cameo or intaglio? The secret art of engraved gems

In the world of signet rings and engraved gems, two terms frequently recur: cameo and intaglio.

Both belong to the tradition of glyptics, the art of carving hardstones, gemstones and natural materials to transform them into images, symbols and small objects to be worn.

The essential difference is simple:

• in a cameo, the figure emerges in relief;
• in an intaglio, the image is carved into the material.

One brings the image towards the surface. The other preserves it within the depths of the stone.

What is glyptics?

Glyptics is an ancient tradition practised on materials such as carnelian, jasper, onyx and sardonyx, as well as natural organic materials including shell and mother-of-pearl.

Engraved gems have been used as seals, ornaments, amulets, symbols of authority and collectors’ objects. They could be set into rings, worn as pendants or impressed into wax and clay.

The Greeks and Romans did not have terms that corresponded precisely to our modern words “cameo” and “intaglio”. In ancient Rome, a collection of engraved gems could be called a dactyliotheca, literally, a collection of rings or stones intended to be worn on the fingers.

The cameo: a figure emerging from the material

The cameo is an image sculpted in relief. The figure remains higher than the background, like a small sculpture surfacing from the material.

Its most fascinating characteristic, however, is not just the relief, but the relationship with the chromatic layers of the material.

In sardonyx and layered agates, the engraver removes portions of the stone so that a lighter layer forms the figure and a darker one becomes the background. Color, relief, and light are thus conceived together.

The cameo, understood as an autonomous genre, established itself in the Hellenistic world and was used primarily as an ornamental object. Over the centuries, it decorated jewelry, vases, furnishings, and precious objects, enjoying particular favor in the Roman world, the Renaissance, and the Neoclassical period.

The mother-of-pearl cameo

In a mother-of-pearl cameo, the image is born from the iridescence of a natural organic material.

The reflections can shift from silvery gray to green, from pink to violet, changing according to the light. The engraver must interpret the color, grain, and luminosity of each fragment, allowing the material to participate in the construction of the image.

For this reason, no two mother-of-pearl cameos are perfectly identical.

Marcus Aurelius in the Cameo Collection: the profile emerges in relief from an authentic cameo carved on grey Tahitian mother-of-pearl. Discover the Marcus Aurelius Signet Ring →

The intaglio: an image carved into the stone

In an intaglio, the figure does not emerge from the surface, but is incised into the stone.

It is a technique much older than the cameo, with roots in Mesopotamian cylinder seals and Egyptian scarabs.

When an intaglio is used as a seal, the stone is pressed into wax or clay. The carved image thus produces a raised, mirror-image impression. For this reason, names, initials, and inscriptions intended for a seal were engraved in reverse.

Not all intaglios, however, were designed to leave an impression. Some magical stones, directly legible inscriptions, and large Renaissance compositions were intended primarily to be observed or worn on the body.

Marcus Aurelius in the Intaglio Collection: the Emperor's profile is carved into the depth of natural red carnelian, following the tradition of ancient seals. Discover the Carnelian Marcus Aurelius Signet Ring →

The seal: a signature to carry with you

In the ancient world, the seal could function simultaneously as a signature, a lock, and a sign of authority.

It was used to seal letters and containers, protect goods, authenticate documents, and identify the owner. Handing one’s signet ring to a messenger or an administrator could signify authorizing them to act in one's name.

The ring was therefore not merely an ornament. It was a personal image capable of symbolically representing the wearer.

A still-living tradition

Cameos and intaglios have traversed different civilizations and eras. Ancient gems were collected in the Roman world, remounted on medieval objects, and rediscovered by artists and antiquarians during the Renaissance and Neoclassical period.

Their history demonstrates how a small stone can survive its time, change settings, and acquire new meanings.

At Sigillum Stones, this tradition is reinterpreted through a contemporary sensibility.

In the Cameo Collection, mythological figures, historical personages, and symbols are sculpted in relief on grey Tahitian mother-of-pearl.

In the Intaglio Collection, images are carved into the depth of hardstones like carnelian and mounted on rings made to the chosen size.

Through our Bespoke service, this same tradition can embrace a coat of arms, a monogram, a portrait, a motto, or a personal symbol.

Because an engraved gem does not only tell what is visible.

It tells what we choose to carry with us.