I bought this living in New Mexico but don't know much about it.  This is a summary based on some AI research.

Vintage Southwestern-style turquoise heishi necklace featuring hand-cut natural turquoise beads with brass accent beads near the clasp. Measures approximately 17 inches. Classic craftsmanship similar to mid-century Kewa Pueblo heishi work. Natural matrix and color variation throughout. Twine ties appear original. Pre-owned with typical wear.