I've decided to go with non-custom, since I want it to be perfect, and I'm no ring-designer! so no color is fine.Are you looking for color or not? Also, are you looking for something that actually looks like a flower or something more like the Tiffany ring which is a "flower shape" but doesn't really look much like a flower? If it's the former Piaget has a very pretty flower ring in their Magic Gardens collection:
http://www.piaget.com/jewellery/white-gold-diamond-ring-g34u5000
VCA also does pretty flower rings...
I'm definitely looking more for "flower shape", not ACTUALLY like a flower. and 6-petals is fine, so I guess that should be pretty common right? but I was wondering if there were any other high-end brands that would make a 6-petal flower perfectly. I really like that on you Vivian, I was actually admiring it earlier while researching flower rings! hehe, it's one of the first results on google images. that's about the right size too, I don't want it to be thicker than the width of my finger. I just wish they made something like that, with 6 'petals'. their garden collection is a little too... round?
I will check out van cleef and arpels right now, thanks!