YOU ARE LOOKING AT A VINTAGE SEA SHELL NECKLACE BY MIRIAM HASKELL.  LONG STRAND OF WHITE SHELLS BOTH SIDES OF THE SHELL SO IT LOOKS LIKE IT IS CLOSED.   EACH ONE MEASURES 1/2" TOTAL LENGTH IS 28" LIGHTWEIGHT CENTER CLASP HAS A ROW OF WHITE GLASS BEADS & LARGE CENTER WHITE BEAD.  TAB CLIPS  INTO A HEXAGON SHAPED SECURE END   HALLMARK MIRIAM HASKELL.  VERY GOOD CLEAN CONDITION.  FROM A SMOKE FREE HOME . THANK YOU FOR LOOKING!!