The "Different Minds" Octopus Signet Ring from Castro Smith is handmade in 9k yellow gold with black rhodium detailing. Inspired by Peter Godfrey-Smith's Other Minds, the design reflects the mysterious yet familiar intelligence shared between humans and cephalopods. The face of the ring features a hand-engraved octopus with one tentacle extending into the inner band. Hand-engraved seaweed motifs climb the sides, adding intricate maritime detail throughout the piece.