Like all the other posters Tia I am enamoured of your Fancy Sapphire ring (being an afficionado of these), I'm sure you will get a lot of pleasure from wearing it. I also think that its lovely to have Tahitian Pearl in your collection, it is a very exotic gemstone and 100% natural as we now know.....and very few gemstones are!
Shame about the PT ring, they are do seem to be hit and miss. However, late last year I did manage to get a couple of very small trilliant cut rings in a good shade of neon turquoise for £69 each and there were a lot of them for sale. But they weren't really ideal for someone wanting a special piece as a one-off, more suitable as an add-on to a collection. But good luck in your quest!