Diamond Prices in 2026: What Lab and Natural Stones Cost Now

Both kinds of diamond got cheaper. Lab-grown stones got much cheaper, natural stones got moderately cheaper, and the gap between them is now wide enough that the choice is less about budget and more about what you want the stone to mean.

All the figures on this page are market reports dated up to October 2026. Diamond prices move every month, so treat them as a snapshot and check the date on any number you see elsewhere.

Market signal	What the report says	Source type
Natural diamond prices	Down 11.5% from March 2025 to March 2026 on the IDEX index, with no positive month since June 2025	Trade press citing the IDEX index
Lab-grown retail prices	About 88% below January 2020 levels	Retailer price tracking
Lab-grown wholesale prices	About 13% lower year on year in Q2 2026, with the decline slowing	Retailer citing the Edahn Golan index
De Beers lab-grown brand	Cut Lightbox prices to as low as $500 per carat in May 2024, then announced in May 2025 it would close the brand, citing the fall in lab-grown prices	Trade press

The De Beers move is the clearest signal of where lab-grown pricing went. The largest natural diamond company in the world launched a lab-grown brand at $800 a carat in 2018, cut it to $500, and then walked away from it. When the price of making a stone keeps dropping, the selling price follows it down.

A lab-grown diamond is real diamond, grown from carbon in a reactor instead of mined. The machines that grow them got faster and cheaper, and more factories came online. That pushed supply far ahead of demand, so wholesale prices fell year after year from 2020.

Three things are true in 2026:

• The fall slowed. Wholesale declines in 2026 are smaller than in 2022 to 2024. Prices are still going down, just not by half every year.
• Retail prices vary a lot. The same grade can be listed at very different prices. Public listings for a lab-grown pear of about 3 carats, E color, VS1 clarity, graded by IGI, ranged from roughly $1,300 to $7,660 in late 2026. The stone is close to identical; the margin is not.
• Big stones became normal. A 3 to 5 carat center stone used to be a luxury purchase. In lab-grown it now sits in the price range of a mid-size natural stone.

For the background on how these stones are made and graded, read the lab-grown diamonds guide.

Natural prices fell too, but for different reasons. Demand from China weakened, lab-grown stones took a share of engagement ring sales in the United States, and mining companies held back supply to stop the slide. The IDEX index showed an 11.5% drop over the twelve months to March 2026.

That is a real decline, but it is a different scale from lab-grown. A natural diamond still costs many times more than a lab-grown diamond of the same carat, color and clarity, because the supply is limited by what comes out of the ground. Rarity is what you pay for with natural; the natural diamonds guide explains what that premium buys.

Price per carat does not rise in a straight line. A 2 carat stone costs more than twice a 1 carat stone of the same grade, because large rough is rarer. That rule is strong in natural diamonds and weaker in lab-grown, where growers can make big crystals on demand.

Stone size	Natural pricing pattern	Lab-grown pricing pattern
Melee (tiny stones in pavé and iced pieces)	Priced by the parcel, low per stone	Very cheap per stone; most iced pieces now use them
0.25 to 1 carat	Steady, popular, still a clear premium	Low, small savings in dollars versus natural
1 to 3 carats	Price per carat climbs fast with size	Gentle climb; most engagement rings land here
3 carats and up	Rare, priced stone by stone	Widely available; the biggest gap versus natural

The practical rule: the bigger the stone you want, the more money lab-grown saves you, in dollars. On a small stud the difference may be a few hundred dollars; on a 4 carat center stone it is often thousands.

Here is what that looks like on actual pieces. Every house ring in our case is graded E color, VS1 clarity, so the comparison below holds color and clarity steady and changes only origin, size and shape.

Piece	Origin	Total carat weight	Price
Round Lab Diamond Ring 4.62 ct, 14K Yellow Gold	Lab-grown	4.62 ct	$2,800
Round Natural Diamond Ring 4.25 ct, 14K Yellow Gold	Natural	4.25 ct	$6,000
Cushion Lab Diamond Ring 3.75 ct, 14K Yellow Gold	Lab-grown	3.75 ct	$3,800
Round Lab Diamond Ring 1.5 ct, 14K White Gold	Lab-grown	1.5 ct	$2,000

Look at the two round rings. The natural ring has less total weight and costs a bit more than twice as much as the lab ring. Put another way, $2,800 buys 4.62 carats of lab-grown diamond, while $6,000 buys 4.25 carats of natural. The other two lab rings show how fast price drops with size in lab-grown: 1.5 carats for $2,000 and a 3.75 carat cushion for $3,800. Browse them in lab diamond engagement rings.

Price tags only make sense side by side when the stones match. Use this order:

1. Same origin. Never compare a lab-grown price with a natural price as if they were the same product. They are different markets.
2. Same grade. Match color and clarity first. An E VS1 and an H SI1 of the same size can be far apart in price, and the cheaper one is not a bargain, it is a lower grade.
3. Center stone vs total weight. A ring listed as "4 ct" may be one 4 carat stone or a smaller center plus side stones. Total carat weight (ctw) adds every stone. One big stone costs much more than the same weight spread across many small ones.
4. Price per carat. Divide price by carat weight to compare different sizes. Our Round Lab Diamond Ring 4.62 ct works out to about $606 per carat of total weight; the Round Natural Diamond Ring 4.25 ct to about $1,412.
5. The gold. A heavy 14K setting adds real metal value. A thin 10K setting adds less.

Listing says	What to ask
"5 carat ring"	Is that the center stone or total carat weight?
"VVS diamonds"	Natural, lab-grown or a simulant, and which exact grade?
"Certified"	Certified by which lab, and can I check the report number?
"Wholesale price"	Compared with what? Ask for color, clarity and carat to compare yourself.

• Buy for the look, not the forecast. Nobody can promise where either market goes next. Pick the stone you will be happy wearing at today's price.
• Lab-grown wins on size per dollar. If a big, white, clean stone is the goal, lab-grown gets you there for a fraction of the cost.
• Natural wins on rarity. If the stone being from the earth matters to you, or you care about long-term value, natural is the only option that has any.
• Compare same grade to same grade. Color, clarity, cut and carat all move price. A cheap stone is often a lower grade, not a better deal.
• Do not wait for a bottom. The lab-grown decline has slowed. Waiting a year may save a little; it also means a year without the ring.

For a side-by-side on origin, see lab vs natural diamonds.

Falling new prices drag down used prices. If a new lab-grown stone costs less every year, a used one is worth less too, and most buyers of used diamonds will not pay much for lab-grown at all. Natural diamonds keep more of their value, but even they sell used well below retail, and the 2025 to 2026 drop cut into that.

The honest summary: a diamond is jewelry first. The full picture on resale is in do lab diamonds have resale value.

Necklaces and bracelets covered in small diamonds follow a different price logic from a solitaire ring. They carry many carats in total, but each stone is small, so price per carat is much lower. Our Round Lab Diamond Necklace 30 ct, 14K White Gold is $8,950, or about $298 per carat of total weight, including the gold. That is why a necklace with ten times the carat weight of a ring can cost only a little more.

When prices are reported in the news, they usually describe single stones of a carat or more. Small stones, which make up iced jewelry, moved even further in lab-grown because they are cheap to produce in bulk.

Every piece on this site carries a price, from small diamond earrings to large natural pieces. House rings are one-of-a-kind pieces in the showroom, and each price reflects that stone's origin, size and shape plus the gold. Our online pieces are made to order in the listed metal colors, and their prices are listed per metal.

If you are working with a smaller budget, start with diamond earrings under $500 or jewelry under $1,000. To see the stones side by side, visit the showroom at 7900 NW 27th Ave, Unit 506, Miami, or call 954-504-5640.