Damaged Oculus

A mysterious and ornate glass oculus in very bad condition. It's not usable in its current state.

It is comprised of three sections: the outer ring, the inner focus ring, and the glass lens.

The worn outer ring looks like it was likely made from a delicate but highly conductive substance.

There are a few empty slots embedded into the inner focus ring so clearly things are missing.

The broken pieces of the lens that remain appear to be something more than just regular glass. They split the light rays that stream through in a vibrant and almost lively way. It's hard to imagine what components could possibly form such unique glass, let alone the searing heat necessary to melt them together. Perhaps the answer relates to how you found it?