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

James Allen: $950

White Flash: $1010

Abazias: $1051

Blue Nile: $1050

Brilliant Earth: $1240

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.