Natural Hawaiian Puka Shell Necklace Graduated

Wonderful vintage Hawaiian puka shell necklace.  The necklace has 100% natural puka shells that are graduated in size from 5.5 mm in diameter to 9.1 mm in diameter. (Measured with caliper) It is on original cable and has original tarnished barrel clasp .

These shells have natural holes, great wear from the ocean and sand and are bleached white by the sun. The colors vary from off-white to white. 

Necklace is 18" long. Weight: 34.2 grams.