Black, white, and pink Fossil Crinoid pendant necklace. The pendant length is 1.1 inches on natural black polished round leather. The necklace is adjustable from 16 inches to 32 inches by sliding the knots.. Crinoids are echinoderms related to starfish, sea urchins, and brittle stars. Many crinoid traits are like other members of their phylum. Such traits include tube feet, radial symmetry, a water vascular system, and appendages in multiples of five (pentameral). Most of the Paleozoic…