Following are some ways to make your diamond look more appealing to the observer.
A Slimmer Band
Fewer or Slimmer Prongs
The more you cover up a diamond, the smaller it will look, particularly if the prongs used are made of rose or yellow gold. Simply leaving it at four slender prongs is a great way to make the center stone look bigger. If you prefer, choose platinum or white gold for the prongs.
Add a Halo
Adding a halo blurs the edges of the diamond and makes it look bigger. Smaller diamonds obviously cost less, which means adding a halo is much better on the wallet than making the center stone bigger. Halos are popular everywhere, so do not hesitate to try this out.