Fantastic find on the set. I had a set like both of those pieces, made for my wife. It was white gold, 1.9 TCW. The center cut was a gia .91 princess, with the crown made of platinum. It appraises for almost $10K today.
Again, Congo Rats on your set find. Now sell it on ebay because it has the ghost of the previous owner stuck in the diamonds and you feel cursed or haunted.
Ohiotech.