From sparkling multi-million-dollar diamonds to custom designs, here are the most expensive diamond rings in the world that redefines luxury.

Blue Nile Jewelry is offering 25% off engagement rings and fine jewelry. The sale includes a variety of styles, including a yellow-gold ring with a marquise diamond similar to one recently seen on ...

After careful consideration, we rounded up the best places to buy engagement rings: Our top pick overall is Blue Nile, which pairs an impressive diamond selection with first-rate customer service.