Which draws more attention...diamond solitaire RING or PENDANT?

I think it really depends on what size the diamond is. If its a small diamond (under 1ct), more attention would be drawn to the necklace. If its large (1.5 or more), the ring or the necklace would probably draw attention equally.
 
i wouldn't put an important diamond on a pendant, i would be afraid of losing it. I have trouble with necklaces breaking...and would be paranoid.

but those are my own issues