Vintage 90’s Amethyst Sterling Silver Necklace

One of a kind artisan piece made of tumbled amethyst and sterling silver that includes a pendant shaped to resemble a creature - maybe scorpion? Sea creature?, delicate circular chain length with what appears to be purple freshwater pearl accents and a spring ring clasp. This item is in good used condition - I purchased it in Kansas City pre 2000. It is approximately 18” long.