Vintage Hawaiian Puka Shell Necklace.
Heirloom Quality Rare Large Shells. 

Classic and highly collectible.

Chunky Native or BOHO statement.
Casual Beach-Surf wear. 

Length is 18" including hook clasp.  
Weight is 137g on my scale.

Likely 60's - 70's vintage. 
Pre-owned in great condition.  Please review photos.  Photos are included as part of the description.