This is a very pretty ring that comes with an IGL certification. Keep in mind 1/4 carat is not very large, but it is a nice stone and setting - it would be appropriate for a small engagement ring. Lucida is a patented Tiffany's cut, and as far as I can tell (I'm not a jeweler) this is not a Lucida cut stone but only a Lucida style setting with a princess cut stone. Still very pretty and the Lucida setting is an elegant and classy setting. Being I1 H, the stone appears flawless, clear, and sparkly to the naked eye and is something you can feel okay about showing off even if it's not the biggest ring ever.