Diamond Ring

Im trying to create diamond ring, and while round diamond look almost the same, other shapes have distorted reflections, and dont look “clean”
my results



Reference , regardless the shape, reflections always looks almost identical, how is it even possible to recreate in blender?




no matter how much i change and add blockers/bounce lights , change materials, i cant achieve that look, im starting to believe it has something to do with blender renderer, rather than all of this .

I believe you need a spectral renderer for diamonds. Blender is not a spectral renderer.
Octane might be a better choice for this.