The diamond band underneath the stone (instead of a halo! And diamonds up the prongs PLUS micropave! Only thing I'd change is add a prong or two - don't like how 4 prongs makes a round diamond look square. I like round :)
Vintage Victorian ring made in yellow gold and centered with an approximately carat cabochon opal. Accented with old mine diamonds weighing approximately carats total. Circa Nothing beats a beautiful opal set with a halo of diamonds!