"Gem Sculpture is the glyptic art, or lithoglyptics; the art of representing designs on precious stones, either in raised work (cameos) or by figures cut into or below the surface (intaglios)."—(Charles Leonard-Stuart, 1911)

Intaglio Engraved Gem

"Gem Sculpture is the glyptic art, or lithoglyptics; the art of representing designs on precious stones,…