This is a comparison of 0.85ct ideal cut, F color, VS1 clarity Round cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $4200

White Flash: $4634

Abazias: $5003

Blue Nile: $6077

Brilliant Earth: $6910

These diamonds are independently inspected and graded by GIA/AGS, which means you can trust their quality. The quality of these diamonds is identical--the only thing that is different is the price. For everything you need to know about buying engagement rings online, please visit http://howiboughtthering.com.