I am sorry to see that no one has responded to your question Mark.

I do not know for sure, but I think that the diamond & pearl tiara, which many think is a re-working of Queen Mary's so called "crochet" tiara, may still be with the family

There may be other jewels, but I suspect we may have to wait to see if any of the late Duchess's children wear any jewels we can recognise.

Unfortunately, the late Duchess didn't wear much jewellery in recent years.