1st Question: which Caroline and which Anne are you talking about? Caroline being the wife of George II or George IV? Anne being the wife of James I or Queen Anne (regnant)?
2nd Question: Has anyone seen a painting or portrait or whatever which show Queen Caroline and Queen Anne wearing these pearl necklaces?
3rd Question: Other than the Royal Collection, what is the source where it was said that these pearl necklaces once belonged to Queens Caroline and Anne?