4 Carat Round Lab Grown Diamond Prices Comparison
A 4 carat round lab grown diamond typically costs $2,235 (median of 9,018 listings at 18 online stores), with most between $1,032 and $10,924. Average prices fell 0.5% over the last month. Updated .
Average $2,990. Listings run from $343 to $41,251 in the 4.00–4.49 carat range.
See the live listings4 Carat Round Lab Grown Diamond Market Overview
CaratRadar currently tracks 9,018 verified 4-carat round lab grown diamonds in the 4.00–4.49 carat benchmark range, listed across 18 online retailers. Prices in this segment range from $343 to $41,251, with an average asking price of $2,990 and a median of $2,235.
Across this category, asking prices span $40,908 (99.2% from the most expensive to the cheapest listing). The same certified diamond can also be listed at different prices by different retailers, which is why CaratRadar compares stones by certificate number.
These figures use the same benchmark range throughout the page and are based on our latest daily market data, matched by certification lab and certificate number across retailers, so you are comparing the exact same diamond.
9,018 diamonds tracked in the 4.00–4.49 carat benchmark
Price range: $343 to $41,251
Average price: $2,990
Median price: $2,235
Available across 18 retailers
Category price spread: 99.2%
Price Range Overview
As of Oct 22, 2026Real market range for this carat, shape, and diamond type.
9,018
$343
$2,990
$2,235
$41,251
Price History
Price Comparison Matrix
Compare nearby
Prices for the next carat weights, other shapes and the natural twin.
Nearby carat weights
Other shapes at 4 carat
- 4 carat princess lab grown diamond pricesAverage $2,782
- 4 carat cushion lab grown diamond pricesAverage $3,316
- 4 carat oval lab grown diamond pricesAverage $2,971
- 4 carat emerald lab grown diamond pricesAverage $2,942
- 4 carat pear lab grown diamond pricesAverage $2,741
- 4 carat radiant lab grown diamond pricesAverage $2,911
- 4 carat marquise lab grown diamond pricesAverage $2,790
- 4 carat asscher lab grown diamond pricesAverage $3,345
- 4 carat heart lab grown diamond pricesAverage $3,006
Same size, natural
Live Listings
See all listingsCompare current retailer offers in the same benchmark range and open any listing for full details.
Save 73.3%IGI | 4.09ct | Round | F | SI1 | Excellent
From $532
Compare at $1,993
Save 73.3%IGI | 4ct | Round | F | SI1 | Ideal
From $574
Compare at $2,147
Save 73.3%IGI | 4.01ct | Round | F | SI1 | Ideal
From $575
Compare at $2,152
Save 73.3%IGI | 4.02ct | Round | E | SI1 | Excellent
From $588
Compare at $2,199
Save 73.3%IGI | 4.01ct | Round | F | SI1 | Excellent
From $592
Compare at $2,216
Save 73.3%IGI | 4.01ct | Round | E | SI1 | Ideal
From $598
Compare at $2,236
Save 73.2%IGI | 4.03ct | Round | J | VS1 | Very Good
From $599
Compare at $2,239
Save 73.3%IGI | 4.02ct | Round | E | SI1 | Excellent
From $599
Compare at $2,241
Save 73.3%IGI | 4.07ct | Round | F | SI1 | Excellent
From $600
Compare at $2,246
Save 77%IGI | 4ct | Round | G | VS1 | Ideal
From $601
Compare at $2,616
Save 77.4%IGI | 4.04ct | Round | H | VVS2 | Ideal
From $606
Compare at $2,678
Save 77.1%IGI | 4.04ct | Round | G | VS1 | Ideal
From $606
Compare at $2,642
Save 73.3%IGI | 4.05ct | Round | G | VS2 | Excellent
From $608
Compare at $2,274
Save 77.5%IGI | 4.03ct | Round | G | VVS2 | Ideal
From $608
Compare at $2,707
Save 77.5%IGI | 4.03ct | Round | G | VVS2 | Ideal
From $608
Compare at $2,707
Save 77%IGI | 4.05ct | Round | G | VS1 | Ideal
From $608
Compare at $2,649
Save 77.6%IGI | 4.04ct | Round | G | VVS2 | Ideal
From $609
Compare at $2,713
Save 77.6%IGI | 4.04ct | Round | G | VVS2 | Ideal
From $609
Compare at $2,713
Save 77.6%IGI | 4ct | Round | F | VS2 | Excellent
From $614
Compare at $2,738
Save 77.5%IGI | 4.07ct | Round | G | VVS2 | Ideal
From $614
Compare at $2,734
Save 77.5%IGI | 4.07ct | Round | G | VVS2 | Ideal
From $614
Compare at $2,734
Save 77.1%IGI | 4.08ct | Round | G | VVS2 | Ideal
From $615
Compare at $2,685
Save 77.1%IGI | 4.1ct | Round | G | VS1 | Ideal
From $615
Compare at $2,681
Save 77.3%IGI | 4.06ct | Round | G | VS2 | Excellent
From $616
Compare at $2,718
Save 73.3%IGI | 4.01ct | Round | F | VS2 | Excellent
From $616
Compare at $2,304
Save 77.5%IGI | 4.09ct | Round | G | VVS2 | Ideal
From $617
Compare at $2,747
Save 76%IGI | 4ct | Round | H | VS1 | Excellent
From $620
Compare at $2,581
Save 73.1%IGI | 4.13ct | Round | G | VS1 | Excellent
From $622
Compare at $2,308
Save 76%IGI | 4.03ct | Round | H | VS1 | Excellent
From $625
Compare at $2,600
Save 79.9%IGI | 4ct | Round | G | VS2 | Ideal
From $626
Compare at $3,110
Save 77.6%IGI | 4ct | Round | F | VS1 | Excellent
From $629
Compare at $2,807
Save 73%IGI | 4.03ct | Round | G | VVS2 | Excellent
From $631
Compare at $2,339
Save 73%IGI | 4.01ct | Round | F | VS1 | Excellent
From $631
Compare at $2,338
Save 73%IGI | 4.01ct | Round | F | VS1 | Ideal
From $631
Compare at $2,338
Save 75.9%IGI | 4.01ct | Round | G | VS1 | Ideal
From $631
Compare at $2,622
Save 77.6%IGI | 4.02ct | Round | F | VS1 | Excellent
From $632
Compare at $2,821
Save 76%IGI | 4.02ct | Round | G | VS1 | Excellent
From $632
Compare at $2,629
Save 77.1%IGI | 4.26ct | Round | G | VVS2 | Ideal
From $633
Compare at $2,766
Save 73.1%IGI | 4.03ct | Round | G | VS1 | Ideal
From $633
Compare at $2,349
Save 77.5%IGI | 4.09ct | Round | F | VS2 | Excellent
From $633
Compare at $2,819
Save 77.6%IGI | 4.04ct | Round | F | VS1 | Excellent
From $635
Compare at $2,835
Save 76%IGI | 4.04ct | Round | G | VS1 | Ideal
From $635
Compare at $2,642
Save 73.1%IGI | 4.12ct | Round | E | VS2 | Excellent
From $636
Compare at $2,360
Save 73%IGI | 4.02ct | Round | G | VVS2 | Excellent
From $637
Compare at $2,361
Save 38%IGI | 4.3ct | Round | FANCY | SI2 | Ideal
From $638
Compare at $1,029
Save 77.6%IGI | 4.06ct | Round | F | VS1 | Excellent
From $638
Compare at $2,849
Save 77.6%IGI | 4.09ct | Round | F | VS1 | Excellent
From $639
Compare at $2,855
Save 77.6%IGI | 4.02ct | Round | E | VS2 | Excellent
From $639
Compare at $2,856
Save 73%IGI | 4.14ct | Round | F | VS2 | Excellent
From $640
Compare at $2,374
Save 76%IGI | 4.07ct | Round | G | VS1 | Ideal
From $640
Compare at $2,662
Entry pricing in this benchmark range starts around $343.
What to Know When Shopping for 4 Carat Round Lab Grown Diamonds
- Always compare identical certified diamonds across retailers, because the same certificate can be listed at different prices by different stores. Across this whole category, asking prices span $40,908 from the cheapest to the most expensive listing.
- Focus on the 4Cs that matter most to you. Color and clarity grades drive price more than cut in many segments, but cut affects sparkle the most.
- The median price of $2,235 is a useful benchmark. If you see a deal significantly below this, verify the retailer's reputation and return policy.
- Consider eye-clean alternatives. Moving one clarity grade down (e.g., VS2 to SI1) can save 10-15% with no visible difference to the naked eye.
- Lab-grown diamonds offer excellent value. Ensure the stone comes with a GIA or IGI certificate confirming it is laboratory-grown.
- Check shipping, insurance, and return policies. The lowest sticker price is not always the best deal once you factor in total cost of purchase.
- Round brilliants command a premium due to higher rough waste during cutting. If budget matters, consider oval or cushion shapes for similar visual size.
Frequently Asked Questions
We currently track 9,018 comparable stones in the 4.00–4.49 carat benchmark range. Prices start around $343 and go up to $41,251.
Based on the latest market data, the average asking price is about $2,990 with a median around $2,235.
The observed spread is roughly $40,908 across tracked listings, which is about 99.2% from highest to lowest offer in the 4.00–4.49 carat benchmark range.
We refresh pricing data daily so these pages stay current with market changes.
Based on completed market data, the fair market benchmark is $2,990. The median price is $2,235, so offers between the median and fair benchmark can be reasonable, while reputable listings below the median may be especially competitive.
We currently track this stone category across 18 online retailers, giving you a broad view of the competitive landscape.
For most buyers, color differences below G are hard to detect once set in a ring. Clarity grades of VS2 and above are typically eye-clean. Prioritize cut quality for maximum brilliance, then balance color and clarity based on your budget.
Retailer pricing strategies, overhead costs, and margin targets all contribute. Across this category, asking prices span $40,908 from the cheapest to the most expensive listing, and the same certified diamond can also carry different prices at different sellers, which is why direct certified-diamond comparison is essential.
We match diamonds across retailers by their certification lab and certificate number. This means the prices you see are for the exact same physical diamond, not just stones with similar specs. It is a true apples-to-apples comparison.
Diamond prices fluctuate based on supply and demand. Our data refreshes regularly so you can track trends over time. Use the price range on this page as a benchmark and compare it to historical averages when available.
Diamond Terminology
- Carat
- A unit of weight for diamonds equal to 200 milligrams. Larger carat weights are exponentially rarer, which is why prices increase non-linearly with size.
- Cut
- Refers to how well a diamond's facets interact with light. Cut quality ranges from Ideal to Poor and is the single biggest factor affecting a diamond's brilliance.
- Color
- Grades a diamond's lack of color on a scale from D (colorless) to Z (light yellow). Grades D-F are considered colorless; G-J are near-colorless and offer good value.
- Clarity
- Measures the presence of internal inclusions or surface blemishes. Grades range from Flawless (FL) to Included (I3). Most inclusions in VS2 and above are invisible to the naked eye.
Tools and Guides
Tracking Lab Grown inventory for the 4.00–4.49 carat Round diamond benchmark.