This is a comparison of 0.9ct ideal cut, E color, VVS1 clarity Round cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $10,250

White Flash: $10,816

Abazias: $11,573

Blue Nile: $10,776

Brilliant Earth: $12,290

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.