Once a blue moon ago, I had a princess cut ring, that *might* look like what you are trying to describe? although this can be adopted very easily for an elongated gem as well.
Claude Thibaudeau is a designer with something similar.
and other inspiration rings
and just because I love this design, and not what you are looking for but had to try anyways
Claude Thibaudeau is a designer with something similar.
and other inspiration rings
and just because I love this design, and not what you are looking for but had to try anyways