How Much Is a 1 Carat Lab Grown Diamond?

In our diamond search in October 2026, most loose 1 carat round lab-grown diamonds (1.00 to 1.09 carats) with G color or better, VS2 clarity or better and an Excellent cut cost about $370 to $385. Choosing D to F color, VVS2 clarity or better and an Ideal cut raises that only slightly, to about $375 to $400.

Every one of these diamonds comes with an IGI or GIA grading report. Prices in our search update every few hours as the market moves, so treat these figures as a guide and check the search for today’s prices.

At this size, lab-grown prices are tightly bunched, so a few factors matter more than others:

• Shape. Rounds are the most plentiful and the most consistently priced. Fancy shapes such as ovals, pears and emerald cuts vary more, because their proportions, length-to-width ratio and cut quality differ from stone to stone.
• Carat weight. Price climbs with size: a 1.5 carat round costs about $510 to $575 in our search, and a 2 carat round starts at about $725.
• Cut, color and clarity. Moving up the grades adds surprisingly little at 1 carat, which makes a well-cut, eye-clean diamond easy to afford.
• Grading report. Most lab-grown diamonds are graded by IGI, which grades them on the full 4 Cs.

A finished ring is the setting and metal plus the center diamond. Our engagement rings with a 1 carat lab-grown center start at $1,076, and in 14k yellow gold half of our designs cost about $1,450 or less with that center. 18k gold and platinum cost more than 14k, and choosing the Excellent diamond grade on the ring adds a little more.

Every ring is made to order in our Chicago studio in about 4 to 6 weeks, and every center diamond comes with an IGI or GIA report.