This is a comparison of 0.5ct ideal cut, F color, VS1 clarity Round cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $2490

White Flash: $2943

Abazias: $3214

Blue Nile: $3192

Brilliant Earth: $3760

These diamonds are independently inspected and graded by GIA/AGS, which means you can trust their quality. For everything you need to know about buying engagement rings online, please visit http://howiboughtthering.com.