Cameo & Portrait Brooch

A cameo is a carving rather than a setting. Material is cut so a raised figure in a pale layer stands against a darker ground behind it. The value sits almost entirely in how well that figure is cut. Most examples are oval, 1 to 2 inches tall, mounted in a plain or twisted rope frame with a hinged stem on the back.

Three materials cover the field. Shell cameos are carved from conch, thin enough to glow warm orange when held up to a lamp, and light in the hand. Hardstone cameos are cut from banded agate or onyx, stay cold to the touch and cost several times more, because the stone fights the tool at every pass. Molded resin and glass copies are pressed instead of carved, so detail is rounded, identical pieces repeat exactly. The back shows a smooth mold face with no tool marks. Telling them apart takes about a minute. Hold the piece to a bright light and look for translucency at the thin edges, which shell has and resin does not. Press it against your cheek, since stone stays cold for several seconds while plastic warms almost at once. Then study the undercut where the figure lifts away from its ground, because a carver leaves a real shadow there and a mold physically cannot.

Profile portraits are the familiar version, though flowers, scenes and mythological groups are all traditional. Against a cluster brooch, this style reads restrained and historical, and it takes low light poorly since it has no facets to work with. A figural brooch shares the interest in shape but states it as an outline against cloth, while a cameo keeps its whole picture inside a frame.

Wear one on a lapel, a high collar or a coat, or thread it onto a ribbon as a pendant. This is how many inherited pieces get worn now. Shell is the fragile half of the bargain, cracking if the frame is squeezed or the piece is dropped on a hard floor, and a cracked cameo cannot be repaired invisibly.

Read the catch to date a piece roughly. A bare C hook with a tube hinge points to work before about 1900, a sliding trombone tube to the 1890s through the 1950s, and a rotating safety catch to roughly the 1910s onward. Treat that as a clue rather than proof, since catches get replaced and reproductions copy old fittings. Wipe shell with a barely damp cloth and a trace of mineral oil once a year, because shell dries out and crazes into fine surface cracks in heated rooms.