I know this is vintage and it's some sort of carved celluloid. Each square has a design on it and the top layer has been carved and then placed on a thicker piece of material. There are sparkling crystal rhinestones decorating the squares, with beads in between. The necklace measures 24", and the largest square is 1.25". Every piece looks hand carved because you can see the roughness on them. Very good condition. Non-smoking household.