Vintage designer purple silver bead navajo pearl necklace native american

From my personal collection, long bead necklace with silver beads/navajo pearls interspersed with purple stone beads (I do not know what the purple beads are--open to expert opinions). Strung on twine, with sterling silver hook and eye clasp. I polished it up a bit, but it still has some patina. 27" long. 2.54 ounces/72 grams. THIS LISTING FOR BEAD NECKLACE ONLY. Sterling cross sold in another listing. I'm open to any input about stones/pricing. This is my personal collection; I'm no jewelry expert. rodeo navajo native american indian queen festival boho bohemian gypsy hippie nfr vegas cowgril princess antique J62