Natural Hawaiian Puka Shell Necklace with Nugget Turquoise

Vintage 1970s Natural Hawaiian puka shell necklace with a single natural spider web turquoise stone. The shells have natural holes (not drilled by man) and have smooth edges that were sanded by the sea. The sun bleached them to various shades of white and off-white.  They are 8mm to 10mm in diameter. Necklace is 18" long. Weight: 56.4 grams. Original costume grade barrel clasp.