In my opinion, the rose looks very nice until the very middle and then it kinda gets wonky. The petals on the very center should still be concentric. They've got like 4 prongs or something... not sure. The two pieces really don't flow together. They almost looks like they were plopped down separately, not part of the same composition. I think what makes it look odd is the rose is 3D with lots of depth and the locket is completely flat and 2 dimensional, no shadows or depth.
Sorry, not trying to tear it down or be critical, just relating what I see. I don't think I'd return to the same artist.