3.1 Carat Radiant Lab Grown Diamond Prices Comparison
As of July 2026, 3.1 carat radiant lab grown diamonds usually range from $410 to $12,910, with an average price of $2,376.In the last month, prices for these diamonds are down 1.4%.Compare 226 verified listings across 10 retailers tracked by CaratRadar.
3.1 Carat Radiant Lab Grown Diamond Market Overview
CaratRadar currently tracks 226 verified 3.1-carat radiant lab grown diamonds listed across 10 online retailers. Prices in this segment range from $410 to $12,910, with an average asking price of $2,376 and a median of $1,733.
The price spread of $12,500 (96.8% 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.
226 diamonds tracked in this segment
Price range: $410 to $12,910
Average price: $2,376
Median price: $1,733
Available across 10 retailers
Savings potential: up to 96.8%
Price Range Overview
As of Jul 13, 2026Real market range for this carat, shape, and diamond type.
226
$410
$2,376
$1,733
$12,910
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 64.1%IGI | 3.14ct | Radiant | G | VS1 | Very Good
From $501
Compare at $1,396
Save 64.4%IGI | 3.11ct | Radiant | G | VVS2 | Very Good
From $506
Compare at $1,421
Save 72.7%IGI | 3.11ct | Radiant | H | VS1 | Ideal
From $522
Compare at $1,909
Save 72.6%IGI | 3.2ct | Radiant | G | VS1 | Very Good
From $538
Compare at $1,964
Save 72.6%IGI | 3.15ct | Radiant | G | VS2 | Ideal
From $540
Compare at $1,969
Save 62.7%IGI | 3.17ct | Radiant | G | VVS2 | Ideal
From $547
Compare at $1,465
Save 72.4%IGI | 3.2ct | Radiant | G | VS2 | Ideal
From $550
Compare at $1,996
Save 66.6%IGI | 3.14ct | Radiant | H | VS1 | Very Good
From $550
Compare at $1,647
Save 63.3%IGI | 3.13ct | Radiant | F | VS1 | Very Good
From $575
Compare at $1,568
Save 64.7%IGI | 3.15ct | Radiant | E | VS1 | Excellent
From $585
Compare at $1,656
Save 64.8%IGI | 3.19ct | Radiant | E | VS1 | Ideal
From $598
Compare at $1,697
Save 62.2%IGI | 3.2ct | Radiant | F | VS1 | Very Good
From $610
Compare at $1,614
Save 64.9%IGI | 3.17ct | Radiant | H | VVS2 | Ideal
From $614
Compare at $1,747
Save 57.8%IGI | 3.12ct | Radiant | FANCY | SI2 | Excellent
From $620
Compare at $1,469
Save 60.7%IGI | 3.14ct | Radiant | F | VS1 | Ideal
From $620
Compare at $1,578
Save 60.7%IGI | 3.14ct | Radiant | F | VS1 | Very Good
From $620
Compare at $1,578
Save 69.8%IGI | 3.12ct | Radiant | H | VS1 | Excellent
From $620
Compare at $2,056
Save 70.9%IGI | 3.12ct | Radiant | H | SI1 | Excellent
From $625
Compare at $2,147
Save 72.4%IGI | 3.11ct | Radiant | E | VVS2 | Excellent
From $640
Compare at $2,315
Save 59.5%IGI | 3.17ct | Radiant | F | VS1 | Very Good
From $644
Compare at $1,589
Save 72.1%IGI | 3.14ct | Radiant | E | VVS2 | Excellent
From $646
Compare at $2,317
Save 52.8%IGI | 3.18ct | Radiant | H | VS1 | Very Good
From $648
Compare at $1,374
Save 70.6%IGI | 3.18ct | Radiant | E | VVS2 | Very Good
From $650
Compare at $2,213
Save 53.9%IGI | 3.13ct | Radiant | G | VS1 | Excellent
From $653
Compare at $1,418
Save 58.3%IGI | 3.13ct | Radiant | F | VVS2 | Very Good
From $671
Compare at $1,608
Save 67.8%IGI | 3.11ct | Radiant | E | VS1 | Ideal
From $673
Compare at $2,089
Save 58.8%IGI | 3.18ct | Radiant | F | VVS2 | Very Good
From $682
Compare at $1,657
Save 72.5%IGI | 3.2ct | Radiant | D | VS1 | Very Good
From $682
Compare at $2,478
Save 64.9%IGI | 3.11ct | Radiant | H | VS1 | Excellent
From $687
Compare at $1,955
Save 49.8%IGI | 3.12ct | Radiant | G | VS1 | Ideal
From $705
Compare at $1,405
Save 48.5%IGI | 3.14ct | Radiant | H | VVS2 | Ideal
From $709
Compare at $1,376
Save 50.1%IGI | 3.14ct | Radiant | G | VS1 | Ideal
From $709
Compare at $1,422
Save 50%IGI | 3.15ct | Radiant | G | VS1 | Very Good
From $719
Compare at $1,438
Save 72.7%IGI | 3.17ct | Radiant | D | VVS2 | Excellent
From $720
Compare at $2,642
Save 72.6%IGI | 3.15ct | Radiant | D | VVS2 | Very Good
From $720
Compare at $2,625
Save 74.2%IGI | 3.12ct | Radiant | FANCY | VS1 | Very Good
From $725
Compare at $2,811
Save 64.8%IGI | 3.18ct | Radiant | E | VS1 | Very Good
From $736
Compare at $2,093
Save 74.2%IGI | 3.14ct | Radiant | FANCY | VS1 | Very Good
From $736
Compare at $2,857
Save 64.8%IGI | 3.11ct | Radiant | E | VVS2 | Excellent
From $736
Compare at $2,089
Save 51.3%IGI | 3.16ct | Radiant | G | VVS2 | Excellent
From $737
Compare at $1,512
Save 80%IGI | 3.16ct | Radiant | G | VVS2 | Excellent
From $737
Compare at $3,680
Save 74.2%IGI | 3.19ct | Radiant | FANCY | VS1 | Very Good
From $741
Compare at $2,874
Save 11%IGI | 3.17ct | Radiant | G | VS2 | Very Good
From $743
Compare at $835
Save 57.4%IGI | 3.11ct | Radiant | E | VVS2 | Very Good
From $744
Compare at $1,747
Save 65%IGI | 3.11ct | Radiant | D | VVS2 | Very Good
From $754
Compare at $2,153
Save 25%IGI | 3.15ct | Radiant | F | VS2 | Ideal
From $757
Compare at $1,009
Save 53%IGI | 3.13ct | Radiant | E | VS1 | Very Good
From $759
Compare at $1,615
Save 65.1%IGI | 3.13ct | Radiant | D | VVS2 | Excellent
From $762
Compare at $2,186
IGI | 3.11ct | Radiant | D | VVS2 | Ideal
From $769
Save 66.6%IGI | 3.12ct | Radiant | D | VVS2 | Excellent
From $770
Compare at $2,308
Entry pricing in this category starts around $410.
What to Know When Shopping for 3.1 Carat Radiant Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $12,500 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 $1,733 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 226 comparable stones in this segment. Prices start around $410 and go up to $12,910.
Based on the latest market data, the average asking price is about $2,376 with a median around $1,733.
The observed spread is roughly $12,500 across tracked listings, which is about 96.8% 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 $2,376. The median price is $1,733, 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 10 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 $12,500 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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