This deal has ended.
Overstock drops the 14k Gold 1/2ct TDW Round Diamond Engagement Ring (HI, I1) from $666.99 to $600.29 as part of their Red Line Deals. Better yet, activate this link to cut it to $590.29. With free shipping, this is the lowest price we've seen. The color of this diamond is very good (G-H). It features a round prong set diamond and a pave diamond band. There's no sales tax (except UT).