Lab Grown Diamond Prices: What Diamonds Cost in October 2026

Every price on this page comes from our own lab-grown diamond search on the date shown at the top. We count only diamonds with photos, G color or better, VS2 clarity or better and an Excellent cut or better, each with an IGI or GIA grading report, which is the quality our diamond searches open on. For each size and shape we give two ranges: what eight in ten of those diamonds cost, leaving out the cheapest and the most expensive tenth, and the full range from the lowest to the highest price. Every range is rounded out to round numbers, so the real prices sit inside it.

Prices in the search change as suppliers' stock changes, so for today's prices open the diamond search. Every loose diamond is sourced for your order and arrives in about 2 to 3 weeks.

For natural diamonds, a round usually costs the most per carat. Lab-grown diamonds are different: in our search, the least expensive shapes at 1 carat are the round and pear, and at 2 carats the princess. The most expensive at 1 carat is the marquise, and at 2 carats the oval, whose middle price is about 61% above the princess's. Prices for fancy shapes such as ovals and marquises most likely follow demand and the supply of well-cut stones.

With lab-grown diamonds, choose the shape you love: the difference is often a few hundred dollars. Our guide Oval vs Round Diamonds compares the two most popular shapes.

1. Buy just under a popular weight. A 1.90 carat looks almost the same as a 2.00 and costs noticeably less.
2. Put cut first. An Excellent or Ideal cut shows the most sparkle; it matters more than a higher color or clarity grade.
3. Choose eye-clean, not flawless. In a finished ring, VS2 clarity and G or H color look the same to the eye as higher grades.
4. Compare shapes. At some sizes another shape costs hundreds less for the same quality.
5. Ask us. Yareli, our founder and designer, can compare diamonds with you by video or phone.