This is a comparison of 1ct ideal cut, F color, VS2 clarity Round cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $9120

White Flash: $10,812

Abazias: $11,262

Blue Nile: $11,956

Brilliant Earth: $11,820

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.