3.1 Carat Radiant Lab Grown Diamond Prices Comparison
As of May 2026, 3.1 carat radiant lab grown diamonds usually range from $430 to $12,990, with an average price of $2,505.In the last month, prices for these diamonds are down 1.1%.Compare 263 verified listings across 11 retailers tracked by CaratRadar.
3.1 Carat Radiant Lab Grown Diamond Market Overview
CaratRadar currently tracks 263 verified 3.1-carat radiant lab grown diamonds listed across 11 online retailers. Prices in this segment range from $430 to $12,990, with an average asking price of $2,505 and a median of $1,880.
The price spread of $12,560 (96.7% 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.
263 diamonds tracked in this segment
Price range: $430 to $12,990
Average price: $2,505
Median price: $1,880
Available across 11 retailers
Savings potential: up to 96.7%
Price Range Overview
As of May 29, 2026Real market range for this carat, shape, and diamond type.
263
$430
$2,505
$1,880
$12,990
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 61.3%IGI | 3.11ct | Radiant | H | VVS2 | Very Good
From $509
Compare at $1,314
Save 65.9%IGI | 3.2ct | Radiant | E | VS1 | Very Good
From $576
Compare at $1,688
Save 45.3%IGI | 3.15ct | Radiant | F | VS1 | Very Good
From $615
Compare at $1,125
Save 24.9%IGI | 3.15ct | Radiant | E | VVS2 | Very Good
From $619
Compare at $824
Save 54.6%IGI | 3.14ct | Radiant | G | VS2 | Very Good
From $634
Compare at $1,395
Save 54.8%IGI | 3.11ct | Radiant | H | VS1 | Ideal
From $650
Compare at $1,438
Save 50.7%IGI | 3.17ct | Radiant | H | VVS2 | Ideal
From $666
Compare at $1,352
Save 69.7%IGI | 3.14ct | Radiant | E | VVS2 | Ideal
From $666
Compare at $2,198
Save 48.6%IGI | 3.12ct | Radiant | H | VS1 | Excellent
From $669
Compare at $1,302
Save 50.5%IGI | 3.13ct | Radiant | H | VS1 | Excellent
From $680
Compare at $1,375
Save 49.7%IGI | 3.2ct | Radiant | H | VS1 | Excellent
From $690
Compare at $1,373
Save 63.9%IGI | 3.12ct | Radiant | FANCY | SI2 | Excellent
From $690
Compare at $1,912
IGI | 3.16ct | Radiant | FANCY | VS1 | Very Good
From $692
Compare at $1,917
Save 13.8%IGI | 3.17ct | Radiant | F | VS1 | Very Good
From $694
Compare at $805
Save 13.8%IGI | 3.13ct | Radiant | F | VVS2 | Very Good
From $699
Compare at $811
Save 62.4%IGI | 3.2ct | Radiant | D | VS1 | Very Good
From $700
Compare at $1,862
Save 13.8%IGI | 3.18ct | Radiant | F | VVS2 | Very Good
From $710
Compare at $824
Save 50%IGI | 3.15ct | Radiant | G | VS1 | Very Good
From $719
Compare at $1,438
Save 49.5%IGI | 3.15ct | Radiant | D | VS1 | Very Good
From $719
Compare at $1,424
Save 52.8%IGI | 3.15ct | Radiant | G | VS2 | Ideal
From $724
Compare at $1,533
Save 53.2%IGI | 3.14ct | Radiant | F | VS1 | Ideal
From $727
Compare at $1,555
Save 43.4%IGI | 3.11ct | Radiant | H | VS1 | Excellent
From $729
Compare at $1,288
Save 52.8%IGI | 3.2ct | Radiant | G | VS2 | Ideal
From $735
Compare at $1,556
Save 52.5%IGI | 3.14ct | Radiant | F | VS1 | Very Good
From $738
Compare at $1,555
Save 60.6%IGI | 3.2ct | Radiant | D | VS1 | Very Good
From $740
Compare at $1,877
Save 66.2%IGI | 3.11ct | Radiant | E | VS1 | Ideal
From $750
Compare at $2,221
Save 54.9%IGI | 3.16ct | Radiant | E | VS1 | Ideal
From $755
Compare at $1,675
Save 62.9%IGI | 3.12ct | Radiant | D | VVS2 | Excellent
From $758
Compare at $2,042
Save 63%IGI | 3.17ct | Radiant | D | VVS2 | Very Good
From $764
Compare at $2,065
Save 52.6%IGI | 3.19ct | Radiant | F | VS1 | Very Good
From $769
Compare at $1,621
Save 43.5%IGI | 3.16ct | Radiant | E | VS1 | Very Good
From $770
Compare at $1,364
Save 72.4%IGI | 3.14ct | Radiant | FANCY | VS2 | Very Good
From $771
Compare at $2,793
Save 52.7%IGI | 3.14ct | Radiant | E | VS1 | Very Good
From $778
Compare at $1,646
Save 56.6%IGI | 3.11ct | Radiant | D | VS1 | Very Good
From $778
Compare at $1,793
Save 48.8%IGI | 3.17ct | Radiant | G | VVS2 | Ideal
From $779
Compare at $1,521
Save 20.3%IGI | 3.15ct | Radiant | F | VS2 | Ideal
From $783
Compare at $982
Save 43.9%IGI | 3.12ct | Radiant | G | VS1 | Ideal
From $788
Compare at $1,405
Save 53.4%IGI | 3.16ct | Radiant | E | VS1 | Very Good
From $789
Compare at $1,693
Save 42.6%IGI | 3.18ct | Radiant | H | VS1 | Very Good
From $791
Compare at $1,377
Save 42.4%IGI | 3.14ct | Radiant | H | VVS2 | Ideal
From $792
Compare at $1,376
Save 44.3%IGI | 3.14ct | Radiant | G | VS1 | Ideal
From $792
Compare at $1,422
Save 53.2%IGI | 3.2ct | Radiant | E | VS1 | Very Good
From $792
Compare at $1,694
Save 79.5%IGI | 3.2ct | Radiant | D | VVS2 | Very Good
From $793
Compare at $3,870
Save 56.6%IGI | 3.18ct | Radiant | E | VVS2 | Excellent
From $794
Compare at $1,831
Save 62.9%IGI | 3.12ct | Radiant | H | SI1 | Excellent
From $796
Compare at $2,147
Save 52.2%IGI | 3.18ct | Radiant | E | VS1 | Very Good
From $796
Compare at $1,667
Save 43.8%IGI | 3.13ct | Radiant | G | VS1 | Excellent
From $798
Compare at $1,421
Save 61.5%IGI | 3.16ct | Radiant | D | VVS2 | Ideal
From $798
Compare at $2,074
IGI | 3.2ct | Radiant | D | VVS2 | Very Good
From $800
Compare at $810
Save 61.1%IGI | 3.15ct | Radiant | D | VVS2 | Very Good
From $802
Compare at $2,063
Entry pricing in this category starts around $430.
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 $12,560 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 $1,880 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 263 comparable stones in this segment. Prices start around $430 and go up to $12,990.
Based on the latest market data, the average asking price is about $2,505 with a median around $1,880.
The observed spread is roughly $12,560 across tracked listings, which is about 96.7% 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 $2,505. The median price is $1,880, 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 11 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 $12,560 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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