You can choose from various cuts and fashoins say single i.e. solitaires, two budding diamond rings or set of three or clusters etc. Nothing beats attractiveness of pure white scintillating diamonds, if you want to gift her a genuine sparkling solitaire then select a lower grade colorless diamond, thus giving a gigantic look. Cluster of small diamonds also gives twinkling single diamond looks hence you can choose these, you can even go for loose diamonds then use metal band of your selection, except for this you need to know diamonds really well or can buy it from trusted shop only. https://www.voltairediamonds.ie/