You know, I’m just not keen on Kate’s dress. It’s kind of funereal and so unlike the dresses she usually wears to these events. Mind you, I thought the pale blue ruched satin dress she wore earlier in the year was a shocker too.
I thought she was being polite (assuming the necklace was a wedding gift from the Queen, as suggested) wearing the gift so that the giver could see it. It's actually a pretty dated design (IMO), and I suppose that was one of the few occasions that she could get away with wearing it.
It’s “dated” because it wasn’t a wedding gift from the Queen to Kate, it was one of the Queen’s wedding gifts that Kate sometimes loans from the vault 
Personally, I wouldn’t wear it out of politeness, it’s an absolutely spectacular piece!
I love these events and seeing the tiaras come out. It’s sort of a shame that only the Queen changes hers up, but it sort of makes sense that the other Royal women have “their” tiaras.
Apparently the enormous emerald necklace worn by the Queen tonight has never been seen before. There’s some speculation that it was part of the Mrs Greville collection bequeathed to the Queen Mother (which included the emerald tiara Eugenia wore at her wedding).
Apologies if this has already been said, I haven’t caught up with this morning’s posts yet.