3.5 Carat Radiant Lab Grown Diamond Prices Comparison
As of May 2026, 3.5 carat radiant lab grown diamonds usually range from $440 to $17,539, with an average price of $3,265.In the last month, prices for these diamonds are down 6.4%.Compare 1,094 verified listings across 12 retailers tracked by CaratRadar.
3.5 Carat Radiant Lab Grown Diamond Market Overview
CaratRadar currently tracks 1,094 verified 3.5-carat radiant lab grown diamonds listed across 12 online retailers. Prices in this segment range from $440 to $17,539, with an average asking price of $3,265 and a median of $2,292.
The price spread of $17,099 (97.5% 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 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.
1,094 diamonds tracked in this segment
Price range: $440 to $17,539
Average price: $3,265
Median price: $2,292
Available across 12 retailers
Savings potential: up to 97.5%
Price Range Overview
As of May 29, 2026Real market range for this carat, shape, and diamond type.
1,094
$440
$3,265
$2,292
$17,539
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
Save 64.3%IGI | 3.53ct | Radiant | G | VS1 | Ideal
From $575
Compare at $1,610
Save 64.8%IGI | 3.59ct | Radiant | G | VS1 | Ideal
From $585
Compare at $1,662
Save 64.9%IGI | 3.6ct | Radiant | G | VS1 | Ideal
From $587
Compare at $1,670
Save 63.2%IGI | 3.51ct | Radiant | G | VS1 | Excellent
From $588
Compare at $1,596
Save 70%IGI | 3.54ct | Radiant | G | VVS2 | Very Good
From $590
Compare at $1,968
Save 63.3%IGI | 3.53ct | Radiant | G | VS1 | Ideal
From $592
Compare at $1,614
Save 62.6%IGI | 3.53ct | Radiant | G | VS2 | Very Good
From $596
Compare at $1,595
Save 70%IGI | 3.6ct | Radiant | G | VVS2 | Very Good
From $600
Compare at $2,001
Save 64.4%IGI | 3.51ct | Radiant | G | VVS2 | Very Good
From $617
Compare at $1,735
IGI | 3.54ct | Radiant | E | VS2 | Very Good
From $617
Compare at $2,760
Save 76.8%IGI | 3.52ct | Radiant | F | VS1 | Excellent
From $621
Compare at $2,675
Save 77.7%IGI | 3.52ct | Radiant | F | VS1 | Very Good
From $621
Compare at $2,780
IGI | 3.5ct | Radiant | F | VS1 | Very Good
From $625
Compare at $814
Save 77.4%IGI | 3.51ct | Radiant | F | VS1 | Ideal
From $627
Compare at $2,770
Save 64.1%IGI | 3.51ct | Radiant | G | VVS2 | Very Good
From $627
Compare at $1,745
Save 50.1%IGI | 3.58ct | Radiant | I | VS1 | Excellent
From $629
Compare at $1,261
Save 23.2%IGI | 3.52ct | Radiant | F | VS1 | Very Good
From $629
Compare at $819
Save 23.1%IGI | 3.53ct | Radiant | F | VS1 | Ideal
From $631
Compare at $821
Save 77.3%IGI | 3.53ct | Radiant | F | VS1 | Very Good
From $631
Compare at $2,785
IGI | 3.53ct | Radiant | F | VS1 | Very Good
From $631
Compare at $821
Save 77.4%IGI | 3.54ct | Radiant | F | VS1 | Very Good
From $632
Compare at $2,795
IGI | 3.58ct | Radiant | G | VVS2 | Very Good
From $638
Compare at $639
IGI | 3.57ct | Radiant | F | VS1 | Very Good
From $645
Compare at $946
Save 77.7%IGI | 3.5ct | Radiant | E | VS1 | Excellent
From $649
Compare at $2,905
Save 34.8%IGI | 3.53ct | Radiant | E | VS1 | Very Good
From $655
Compare at $1,005
Save 33.8%IGI | 3.56ct | Radiant | E | VS1 | Excellent
From $660
Compare at $997
IGI | 3.56ct | Radiant | E | VS1 | Very Good
From $660
Compare at $2,950
IGI | 3.54ct | Radiant | G | VVS2 | Very Good
From $661
IGI | 3.57ct | Radiant | E | VS1 | Very Good
From $662
Compare at $2,960
Save 62.2%IGI | 3.51ct | Radiant | F | VS1 | Very Good
From $668
Compare at $1,766
Save 65.1%IGI | 3.52ct | Radiant | E | VS1 | Very Good
From $668
Compare at $1,914
Save 31.6%IGI | 3.55ct | Radiant | F | VVS2 | Ideal
From $685
Compare at $1,002
Save 79%IGI | 3.58ct | Radiant | H | VS1 | Ideal
From $696
Compare at $3,320
Save 64.4%IGI | 3.57ct | Radiant | E | VS1 | Very Good
From $697
Compare at $1,960
Save 60.9%IGI | 3.53ct | Radiant | G | VVS2 | Very Good
From $701
Compare at $1,793
Save 77.6%IGI | 3.52ct | Radiant | I | VVS2 | Ideal
From $705
Compare at $3,141
Save 61.7%IGI | 3.6ct | Radiant | E | VS2 | Ideal
From $708
Compare at $1,850
Save 68%IGI | 3.53ct | Radiant | G | VS1 | Excellent
From $709
Compare at $2,215
Save 74.2%IGI | 3.5ct | Radiant | E | VS1 | Very Good
From $709
Compare at $2,752
Save 63.6%IGI | 3.55ct | Radiant | F | VVS2 | Very Good
From $713
Compare at $1,960
Save 63.6%IGI | 3.55ct | Radiant | F | VVS2 | Very Good
From $713
Compare at $1,960
Save 51.1%IGI | 3.5ct | Radiant | F | VVS2 | Very Good
From $713
Compare at $1,458
Save 74.2%IGI | 3.52ct | Radiant | E | VS1 | Ideal
From $713
Compare at $2,768
Save 62.9%IGI | 3.53ct | Radiant | E | VS1 | Ideal
From $714
Compare at $1,923
Save 63.7%IGI | 3.56ct | Radiant | F | VVS2 | Very Good
From $715
Compare at $1,970
Save 62.9%IGI | 3.54ct | Radiant | E | VS1 | Ideal
From $717
Compare at $1,934
Save 63.6%IGI | 3.57ct | Radiant | E | VS1 | Very Good
From $717
Compare at $1,970
Save 70%IGI | 3.51ct | Radiant | E | VS1 | Very Good
From $718
Compare at $2,397
Save 59%IGI | 3.5ct | Radiant | G | VVS2 | Very Good
From $719
Compare at $1,752
Save 62%IGI | 3.5ct | Radiant | F | VVS2 | Ideal
From $720
Compare at $1,896
Entry pricing in this category starts around $440.
What to Know When Shopping for 3.5 Carat Radiant Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $17,099 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 $2,292 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 1,094 comparable stones in this segment. Prices start around $440 and go up to $17,539.
Based on the latest market data, the average asking price is about $3,265 with a median around $2,292.
The observed spread is roughly $17,099 across tracked listings, which is about 97.5% from highest to lowest offer in this bucket.
We refresh pricing data daily so these pages stay current with market changes.
Based on completed market data, the fair market benchmark is $3,265. The median price is $2,292, 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 12 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 $17,099 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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