Answer: scrimshaw

AnswerCrossword Clue
SCRIMSHAWCarving medium
SCRIMSHAWIvory carving
scrimshawto carve or engrave into scrimshaw
scrimshawto ornament, as shells, ivory, etc., by engraving, and (usually) rubbing pigments into the incised lines also SCRIMSHANDER, SCRIMSHANDY
scrimshawproduce scrimshaw