I like the earthiness and simplicity of the kojima peal styles and that would be a lovely choice. I would like to put one other option on the table if you would be interested in a non-blue sapphire ring. I was looking on the natural sapphire company website and they have a really nice selection of natural sapphires that have not been been treated at all, not even heat--just cut and polished. The come in almost every color. I saw this nice lime green 1ct sapphire that is vvs1, transparent with excellent saturation and vivid color. I tout it would look nice in a halo setting, but since the stone is gorgeous with sparkle, you could also save a few Cents and go for a Tiffany style setting, without side stones. It's a fun site to play with too, o you may want to check it out for fun. The prices aren't bad. If you on't mind heat treated stones (which is almost every sapphire in the market), similar looking stones are available for about half the price or for the same money you can get a similar stone in a much larger size. You can get the sapphire in any color--yellow sapphires are almost always the least expensive. Anyway, here's the link: the setting:
http://www.thenaturalsapphirecompan...l3RL+NRs9YRpdsKaXuE1UCvuY5CoJ08Y2EUUTwSlyQw==
And the stone:
http://www.thenaturalsapphirecompany.com/Sapphires/Unique/Oval/Stoneid=U3474