This is a comparison of 0.4ct ideal cut, F color, VS1 clarity Round cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $1100

White Flash: $1274

Abazias: $1281

Blue Nile: $1248

Brilliant Earth: $1430

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.