upgrading diamond in engagement ring?

[Tinks]

You can always ask.

[LimeSlice]

One of the emeralds in my engagement ring chipped a few weeks after I got it, for no apparent reason. It is a bezel setting. We took it back to the jeweller who made the ring, and had all three stones replaced for free (they were all chosen as a set). There was no damage to the ring, they were simply replaced.

Take the ring back to the jeweller who made it, and have them replace it for free - they should have disclosed the flaw at the time of purchase - and there should be no reason you cannot have the same setting.