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 go for the satin finish then you can rejunanate it with a brisk brush from a
Scotchbrite pad (as used for washing up)
There are also matching rings and earrings.