25” Natural stone & seed bead necklace

Seed beads and gold beads are not glass or other but just an unknown material. The purple is two different types of natural stone. Some stones are registering on my presidium II as quartz-amethyst-citrine and and others jadeite-spinel so it’s a mix of purple stones. Dark purple jadeite is rare and purple spinel if dark in color is valuable. 25” , screw back clasp. Jewelry is clean and kept in a clean smoke free home.