Dear Patty, I recently purchased a vintage 14k Mikimoto Pearl Brooch on an auction website paid almost $700. The website states visible glue on the Pearl. I examined the brooch carefully, it does have MG K14 hallmark on the brooch. On the back of some pearls do have noticeable yellow glue than the other pearls. All pearls do appear to be light cream in bright luster. But some of the pearls are not in a perfect condition, you can see tiny blemishes on the pearls. Do you think it’s possible for someone to switch pearls?