Why does everyone make a big deal when a Royal wears the same item of clothing twice?
Here she wears the same beautiful blue brocade coat with a blue dress and blue fascinator to the service celebrating Prince Philip's 90th birthday. Personally, I like this look the best. But the whole point of this post is to point out the earrings.
Sapphire surrounded with diamonds hanging off of what looks like a diamond stud. Could these be Diana's earrings?