Stone inoclay limited edition plates Incolay Studios of California discovered a way to translate the ancient art of cameo carving into a new medium. The Return of Ulyesses; Penelope and Ulysses; Land of the Phaeacians; The isle of Calypso. The Sirens. The Plates are 8 1/4" in diameter .. 3-dimensional raised design, Cameo Style, very detailed Incolay Stone, a unique combination of materials deriving its depth and hue from quartz-based minerals that replicate the coloring and weight of semi-precious stone. This set of plates are IOB each and each with their certificate of authenticity.