According to the information published by Christie's in the auction catalogue, the bracelet was made in 1963, although Richard Burton did not give it to Elizabeth Taylor until 1967.

Christie's https://www.christies.com/lotfinder/jewelry/an-emerald-and-diamond-bracelet-by-bvlgari-5507906-details.aspx?from=salesummery&intObjectID=5507906&sid=3e0ffcc9-9039-4eea-8e4b-cd8d7f437a6d

In Van Cleef and Arpels page 241 Vincent Meylan says that Barbara Hutton had her emeralds reset in 1966 and sold them to the firm in 1967, so none of the emeralds in the bracelet can have come from Barbara Hutton.