Diamond kiss bangles
5mm bangles in round or reversed D section set with a 2pt brilliant diamond in an 18ct cross.
I tend to supply these with a satin finish as it brings out the contrast between the metals better.
Having said that, polished jewellery dulls down over time so the effect will not be lost.
If you choose the satin finish then you can rejuvenate it with a brisk brush from a Scotchbrite pad (as used for washing up)