I have a pair of cufflinks and a tie clasp that match. They’re from the 1950s and I can’t tell you what type of metal it is or if there’s any pearl on it only thing I can tell you is they are in excellent condition. They were owned by a family member.  Looks like they might not ever been used!  And if so,  it was probably once or twice. If you have any questions, please reach out to me. Thank you.