4.5 Carat Radiant Lab Grown Diamond Prices Comparison
As of October 2026, 4.5 carat radiant lab grown diamonds in the 4.50–4.99 carat benchmark range usually range from $532 to $33,943, with an average price of $2,923.In the last month, prices for these diamonds are down 0.7%.Compare 2,128 verified listings across 15 retailers tracked by CaratRadar.
4.5 Carat Radiant Lab Grown Diamond Market Overview
CaratRadar currently tracks 2,128 verified 4.5-carat radiant lab grown diamonds in the 4.50–4.99 carat benchmark range, listed across 15 online retailers. Prices in this segment range from $532 to $33,943, with an average asking price of $2,923 and a median of $2,070.
The price spread of $33,411 (98.4% 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.
2,128 diamonds tracked in the 4.50–4.99 carat benchmark
Price range: $532 to $33,943
Average price: $2,923
Median price: $2,070
Available across 15 retailers
Savings potential: up to 98.4%
Price Range Overview
As of Oct 14, 2026Real market range for this carat, shape, and diamond type.
2,128
$532
$2,923
$2,070
$33,943
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 69%IGI | 4.51ct | Radiant | G | VS1 | Very Good
From $693
Compare at $2,232
Save 68.6%IGI | 4.59ct | Radiant | F | VS2 | Very Good
From $703
Compare at $2,242
Save 59.8%IGI | 4.55ct | Radiant | F | VS1 | Very Good
From $707
Compare at $1,758
Save 59.8%IGI | 4.56ct | Radiant | F | VS1 | Very Good
From $709
Compare at $1,764
Save 59.8%IGI | 4.56ct | Radiant | F | VS1 | Very Good
From $709
Compare at $1,764
Save 68.9%IGI | 4.53ct | Radiant | F | VS2 | Very Good
From $713
Compare at $2,296
Save 58.1%IGI | 4.52ct | Radiant | H | VVS2 | Excellent
From $722
Compare at $1,723
Save 58.2%IGI | 4.51ct | Radiant | F | VS1 | Excellent
From $723
Compare at $1,731
Save 70.7%IGI | 4.52ct | Radiant | E | VS2 | Ideal
From $729
Compare at $2,486
Save 70.7%IGI | 4.59ct | Radiant | F | VS2 | Very Good
From $740
Compare at $2,523
Save 70.7%IGI | 4.55ct | Radiant | F | VS1 | Very Good
From $742
Compare at $2,530
Save 73%IGI | 4.77ct | Radiant | H | VS1 | Ideal
From $745
Compare at $2,755
Save 60.8%IGI | 4.58ct | Radiant | F | VVS2 | Very Good
From $746
Compare at $1,902
Save 70.7%IGI | 4.84ct | Radiant | G | VS1 | Ideal
From $753
Compare at $2,568
Save 68.6%IGI | 4.55ct | Radiant | E | VS2 | Very Good
From $759
Compare at $2,421
Save 68.7%IGI | 4.5ct | Radiant | F | VS1 | Very Good
From $759
Compare at $2,423
Save 68.7%IGI | 4.57ct | Radiant | E | VS2 | Very Good
From $762
Compare at $2,431
Save 69.7%IGI | 4.52ct | Radiant | F | VVS2 | Very Good
From $762
Compare at $2,512
Save 70.7%IGI | 4.51ct | Radiant | F | VS1 | Very Good
From $767
Compare at $2,616
Save 70.7%IGI | 4.68ct | Radiant | F | VS2 | Ideal
From $770
Compare at $2,627
IGI | 4.69ct | Radiant | FANCY | VS1 | Very Good
From $772
Compare at $3,657
Save 43.8%IGI | 4.55ct | Radiant | FANCY | VS2 | Very Good
From $774
Compare at $1,378
Save 50.6%IGI | 4.53ct | Radiant | G | VS1 | Ideal
From $774
Compare at $1,566
Save 52.7%IGI | 4.71ct | Radiant | FANCY | VS2 | Excellent
From $775
Compare at $1,639
Save 50.1%IGI | 4.51ct | Radiant | FANCY | SI1 | Very Good
From $783
Compare at $1,569
IGI | 4.77ct | Radiant | FANCY | VS2 | Excellent
From $784
Compare at $3,719
Save 73.6%IGI | 4.61ct | Radiant | G | VS1 | Ideal
From $790
Compare at $2,996
Save 78.2%IGI | 4.5ct | Radiant | F | VS1 | Very Good
From $792
Compare at $3,626
Save 46.3%IGI | 4.53ct | Radiant | G | VS2 | Very Good
From $792
Compare at $1,474
Save 73.5%IGI | 4.62ct | Radiant | G | VS1 | Ideal
From $795
Compare at $3,002
Save 78.2%IGI | 4.54ct | Radiant | F | VS1 | Very Good
From $799
Compare at $3,658
Save 78.2%IGI | 4.56ct | Radiant | F | VS1 | Very Good
From $802
Compare at $3,674
Save 72.6%IGI | 4.58ct | Radiant | G | VVS2 | Ideal
From $804
Compare at $2,936
Save 67.9%IGI | 4.59ct | Radiant | E | VS1 | Ideal
From $808
Compare at $2,521
Save 70.7%IGI | 4.57ct | Radiant | D | VS2 | Very Good
From $817
Compare at $2,785
Save 42.8%IGI | 4.53ct | Radiant | FANCY | VS1 | Very Good
From $818
Compare at $1,431
Save 60.9%IGI | 4.99ct | Radiant | F | VS1 | Very Good
From $821
Compare at $2,100
Save 50%IGI | 4.55ct | Radiant | G | VS1 | Ideal
From $825
Compare at $1,650
Save 73.6%IGI | 4.87ct | Radiant | G | VS1 | Ideal
From $825
Compare at $3,121
Save 73.9%IGI | 4.52ct | Radiant | G | VVS2 | Very Good
From $829
Compare at $3,172
Save 51.4%IGI | 4.52ct | Radiant | E | VS2 | Ideal
From $830
Compare at $1,708
Save 47%IGI | 4.6ct | Radiant | G | VS1 | Very Good
From $840
Compare at $1,586
Save 64.1%IGI | 4.5ct | Radiant | G | SI1 | Ideal
From $844
Compare at $2,353
Save 63.9%IGI | 4.56ct | Radiant | F | VS1 | Ideal
From $846
Compare at $2,345
Save 70.4%IGI | 4.56ct | Radiant | E | VS1 | Ideal
From $847
Compare at $2,863
Save 65.1%IGI | 4.54ct | Radiant | E | VS2 | Very Good
From $853
Compare at $2,446
Save 78.2%IGI | 4.56ct | Radiant | F | VVS2 | Ideal
From $853
Compare at $3,911
Save 78.2%IGI | 4.56ct | Radiant | F | VVS2 | Very Good
From $853
Compare at $3,911
Save 55.6%IGI | 4.58ct | Radiant | F | VVS2 | Ideal
From $857
Compare at $1,932
Save 70.4%IGI | 4.96ct | Radiant | E | VS1 | Excellent
From $858
Compare at $2,899
Entry pricing in this benchmark range starts around $532.
What to Know When Shopping for 4.5 Carat Radiant Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $33,411 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 $2,070 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 2,128 comparable stones in the 4.50–4.99 carat benchmark range. Prices start around $532 and go up to $33,943.
Based on the latest market data, the average asking price is about $2,923 with a median around $2,070.
The observed spread is roughly $33,411 across tracked listings, which is about 98.4% from highest to lowest offer in the 4.50–4.99 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 $2,923. The median price is $2,070, 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 15 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 $33,411 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.
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Tracking Lab Grown inventory for the 4.50–4.99 carat Radiant diamond benchmark.