if you could only have ONE ring at this point in your life...
To have or to wear?
To have and look at from time to time: a fine blue sapphire, medium tone and vivid saturation, in an all-original Deco mounting.
To wear (like every day): a big ol' low-color (but not too sallow) step cut diamond set E/W in a palladium WG mounting. Or a nice-color Asscher or Octavia.