Boho faux abalone necklace

Necklace features a large, freeform abalone shell pendant set in a vintage-style brass or bronze-toned metal frame, hung on a matching chain. Natural (or faux?) abalone shell (iridescent greens, blues, and purples). Rope-edged bezel, possibly antiqued brass. Bohemian / artisan / 1970s revival Long (26") multi-link, matches the rustic tone of the pendant