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

James Allen: $1050

White Flash: $1233

Abazias: $1236

Blue Nile: $1167

Brilliant Earth: $1420

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.