Pro: You Can Get a Good Deal Buying a Diamond Online So, while there are no great deals in diamonds, online retailers and online custom jewelers like CustomMade can offer lower prices compared to a brick-and-mortar store, and comparable prices to places like Blue Nile or James Allen.

Each piece of jewelry is thoroughly scrutinized for diamond quality, as well as overall manufacturing and craftsmanship. Costco's team of Gemologists, all of whom have graduated from a GIA program, inspect for diamond color, clarity, cut, and carat weight.

The price you're offered for your diamond can also vary hugely depending on how you choose to sell it. We've covered these reasons in more detail below. In most cases, a diamond engagement ring or other diamond jewelry will have a resale value of between 20 and 60% of the amount it cost when it was new.

Jared's lab-created diamonds are graded to the same standards as our natural diamonds. That means your lab-created diamond will be accompanied by an independent laboratory report detailing its “4 Cs” - cut, color, clarity, and carat weight.