4 Carat Radiant Lab Grown Diamond Prices Comparison
As of October 2026, 4 carat radiant lab grown diamonds in the 4.00–4.49 carat benchmark range usually range from $218 to $38,571, with an average price of $2,882.In the last month, prices for these diamonds are flat -0%.Compare 5,839 verified listings across 16 retailers tracked by CaratRadar.
4 Carat Radiant Lab Grown Diamond Market Overview
CaratRadar currently tracks 5,839 verified 4-carat radiant lab grown diamonds in the 4.00–4.49 carat benchmark range, listed across 16 online retailers. Prices in this segment range from $218 to $38,571, with an average asking price of $2,882 and a median of $1,934.
The price spread of $38,353 (99.4% from highest to lowest) highlights why comparing identical certified diamonds across multiple retailers matters. Two identical certified diamonds can differ by hundreds or even thousands of dollars depending on the retailer.
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.
5,839 diamonds tracked in the 4.00–4.49 carat benchmark
Price range: $218 to $38,571
Average price: $2,882
Median price: $1,934
Available across 16 retailers
Savings potential: up to 99.4%
Price Range Overview
As of Oct 15, 2026Real market range for this carat, shape, and diamond type.
5,839
$218
$2,882
$1,934
$38,571
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers in the same benchmark range and open any listing for full details.
Save 55.1%IGI | 4ct | Radiant | E | SI2 | Very Good
From $573
Compare at $1,276
Save 50.3%IGI | 4.06ct | Radiant | FANCY | SI1 | Excellent
From $605
Compare at $1,217
Save 73%IGI | 4.02ct | Radiant | H | VS1 | Excellent
From $630
Compare at $2,335
Save 73%IGI | 4ct | Radiant | G | VS2 | Very Good
From $634
Compare at $2,351
Save 73%IGI | 4.01ct | Radiant | H | VS1 | Very Good
From $635
Compare at $2,355
Save 73%IGI | 4.01ct | Radiant | H | VS1 | Excellent
From $635
Compare at $2,355
Save 73%IGI | 4.02ct | Radiant | G | VS2 | Very Good
From $637
Compare at $2,361
Save 73%IGI | 4.04ct | Radiant | E | VS2 | Excellent
From $647
Compare at $2,400
Save 79.9%IGI | 4.02ct | Radiant | G | VS2 | Excellent
From $655
Compare at $3,260
Save 78.7%IGI | 4.03ct | Radiant | G | VS2 | Excellent
From $657
Compare at $3,090
Save 68.9%IGI | 4.2ct | Radiant | H | VS2 | Good
From $664
Compare at $2,137
Save 25.4%IGI | 4ct | Radiant | D | SI1 | Ideal
From $666
Compare at $893
Save 69%IGI | 4.03ct | Radiant | G | VS1 | Very Good
From $668
Compare at $2,152
Save 68.9%IGI | 4.03ct | Radiant | G | VS1 | Very Good
From $676
Compare at $2,176
Save 69%IGI | 4.05ct | Radiant | G | VVS2 | Very Good
From $679
Compare at $2,187
Save 69%IGI | 4.1ct | Radiant | F | VS2 | Very Good
From $679
Compare at $2,188
Save 56.3%IGI | 4.01ct | Radiant | F | VS1 | Very Good
From $684
Compare at $1,566
Save 56.3%IGI | 4.01ct | Radiant | F | VS1 | Very Good
From $684
Compare at $1,566
Save 60.9%IGI | 4.02ct | Radiant | E | VS1 | Very Good
From $684
Compare at $1,748
Save 57.3%IGI | 4.03ct | Radiant | E | VS2 | Very Good
From $688
Compare at $1,611
Save 40.6%IGI | 4.05ct | Radiant | D | VS2 | Very Good
From $691
Compare at $1,163
Save 71.7%IGI | 4.03ct | Radiant | E | VS1 | Very Good
From $694
Compare at $2,455
Save 59.9%IGI | 4.02ct | Radiant | E | VS1 | Very Good
From $694
Compare at $1,731
Save 55%IGI | 4.01ct | Radiant | F | VS1 | Very Good
From $698
Compare at $1,552
Save 32.6%IGI | 4.07ct | Radiant | F | VS2 | Ideal
From $700
Compare at $1,039
Save 39.5%IGI | 4ct | Radiant | FANCY | SI1 | Very Good
From $702
Compare at $1,160
Save 55.3%IGI | 4.04ct | Radiant | F | VS1 | Very Good
From $703
Compare at $1,574
Save 70.8%IGI | 4.03ct | Radiant | F | VS1 | Very Good
From $703
Compare at $2,409
Save 69%IGI | 4.31ct | Radiant | G | VS1 | Excellent
From $704
Compare at $2,268
Save 78.1%IGI | 4.04ct | Radiant | F | VVS2 | Excellent
From $705
Compare at $3,220
Save 40.6%IGI | 4.13ct | Radiant | E | VS2 | Very Good
From $705
Compare at $1,186
Save 70.9%IGI | 4.01ct | Radiant | E | VS1 | Ideal
From $706
Compare at $2,423
Save 28.6%IGI | 4.19ct | Radiant | H | VS2 | Ideal
From $708
Compare at $991
Save 63.4%IGI | 4.02ct | Radiant | D | VS1 | Excellent
From $708
Compare at $1,933
Save 69.7%IGI | 4.16ct | Radiant | D | VS1 | Very Good
From $710
Compare at $2,347
Save 68.9%IGI | 4ct | Radiant | F | VS2 | Very Good
From $710
Compare at $2,282
Save 63.4%IGI | 4.03ct | Radiant | D | VS1 | Very Good
From $711
Compare at $1,941
Save 56.9%IGI | 4.37ct | Radiant | G | VS1 | Excellent
From $712
Compare at $1,653
Save 68.9%IGI | 4.02ct | Radiant | G | VVS2 | Very Good
From $712
Compare at $2,292
Save 38.3%IGI | 4.03ct | Radiant | FANCY | SI2 | Very Good
From $714
Compare at $1,157
Save 70.8%IGI | 4.05ct | Radiant | E | VS1 | Ideal
From $714
Compare at $2,447
Save 54.3%IGI | 4.03ct | Radiant | F | VS1 | Very Good
From $714
Compare at $1,562
Save 52.4%IGI | 4.06ct | Radiant | G | VVS2 | Very Good
From $714
Compare at $1,501
Save 62.9%IGI | 4.01ct | Radiant | D | VS1 | Excellent
From $714
Compare at $1,926
Save 77.3%IGI | 4ct | Radiant | FANCY | VS2 | Very Good
From $716
Compare at $3,154
Save 77.3%IGI | 4ct | Radiant | FANCY | VS2 | Very Good
From $716
Compare at $3,154
Save 54.9%IGI | 4.06ct | Radiant | F | VS1 | Ideal
From $716
Compare at $1,589
Save 52.6%IGI | 4.03ct | Radiant | F | VS2 | Very Good
From $717
Compare at $1,512
Save 68.9%IGI | 4.04ct | Radiant | G | VS1 | Very Good
From $717
Compare at $2,303
Save 68.9%IGI | 4.23ct | Radiant | E | VS2 | Very Good
From $718
Compare at $2,311
Entry pricing in this benchmark range starts around $218.
What to Know When Shopping for 4 Carat Radiant Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $38,353 or more.
- 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 $1,934 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.
- Radiant cuts combine the elegance of emerald shapes with the brilliance of round cuts, offering good value per carat.
Frequently Asked Questions
We currently track 5,839 comparable stones in the 4.00–4.49 carat benchmark range. Prices start around $218 and go up to $38,571.
Based on the latest market data, the average asking price is about $2,882 with a median around $1,934.
The observed spread is roughly $38,353 across tracked listings, which is about 99.4% 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 $2,882. The median price is $1,934, 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 16 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. The exact certified diamond can differ by $38,353 across 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.
Related Price Categories
Explore adjacent carat ranges and shapes to compare market shifts.
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Tracking Lab Grown inventory for the 4.00–4.49 carat Radiant diamond benchmark.