This set is a bracelet and a choker necklace.  
It is made with white and purple shell pieces.  
The bracelet is 6-1/2 inches long with a spring ring closure.  
The necklace is 16 inches long and has a barrel screw in closure. 
White & Purple Shell Pieces Necklace and Bracelet Set
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Choker Necklace, Bracelet Set  White, Purple Shell Pieces - Demi Parure listed in:
          
            Vintage Bracelets
            , Vintage Necklaces, Vintage Sets, Demi Parures