Tackling the Van Sciver 2.0 ring from scratch yet again. It’s a really tricky design, to say the least. The concept art posted upthread shows raised ribs surrounding either side of the finger-hole, which blend into the bezel surrounding the symbol. The bezel itself may actually be conical, rather than a disc. The actual comic art may have dispensed with the ribs, and the outer edges of the disc appear to be cut flush with the leading edge of either side of the finger-hole.