Natural White Hawaiian Puka Shell Necklace 17" long

Vintage 1970s Hawaiian puka shell necklace. The shells are natural with natural holes. Well bleached by the sun, pitted and smoothed by the ocean and sun., They are 6mm in diameter. Necklace is 17" long. Weight: 25.7 grams. Original costume grade clasp. Has wooden beads near the clasp.