This is a comparison of 0.5ct ideal cut, E color, SI1 clarity Oval cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $1130

White Flash: $1198

Abazias: $1282

Blue Nile: $1150

Brilliant Earth: $1350

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.