This is a comparison of 0.75ct ideal cut, E color, VS clarity Cushion cut diamonds (click the dollar amount to be taken directly to the diamond):

James Allen: $2130

White Flash: $2768

Abazias: $3055

Brilliant Earth: $3590

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.