3.1 Carat Cushion Lab Grown Diamond Prices Comparison
As of May 2026, 3.1 carat cushion lab grown diamonds usually range from $458 to $13,290, with an average price of $2,674.In the last month, prices for these diamonds are down 6%.Compare 419 verified listings across 10 retailers tracked by CaratRadar.
3.1 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 419 verified 3.1-carat cushion lab grown diamonds listed across 10 online retailers. Prices in this segment range from $458 to $13,290, with an average asking price of $2,674 and a median of $1,860.
The price spread of $12,832 (96.6% 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.
419 diamonds tracked in this segment
Price range: $458 to $13,290
Average price: $2,674
Median price: $1,860
Available across 10 retailers
Savings potential: up to 96.6%
Price Range Overview
As of May 29, 2026Real market range for this carat, shape, and diamond type.
419
$458
$2,674
$1,860
$13,290
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 70%IGI | 3.14ct | Cushion | H | VS2 | Ideal
From $508
Compare at $1,696
Save 57%IGI | 3.16ct | Cushion | I | VS2 | Ideal
From $512
Compare at $1,192
Save 70%IGI | 3.12ct | Cushion | H | VS1 | Ideal
From $535
Compare at $1,784
Save 70%IGI | 3.15ct | Cushion | H | VS1 | Good
From $540
Compare at $1,801
Save 55.1%IGI | 3.11ct | Cushion | H | VS1 | Ideal
From $580
Compare at $1,291
Save 71.9%IGI | 3.12ct | Cushion | E | VS2 | Very Good
From $585
Compare at $2,081
Save 58.2%IGI | 3.12ct | Cushion | G | VVS2 | Very Good
From $604
Compare at $1,444
Save 22.9%IGI | 3.11ct | Cushion | F | VS1 | Excellent
From $615
Compare at $798
Save 59%IGI | 3.2ct | Cushion | G | VVS2 | Very Good
From $620
Compare at $1,513
Save 59%IGI | 3.2ct | Cushion | G | VVS2 | Good
From $620
Compare at $1,513
Save 60.4%IGI | 3.18ct | Cushion | D | SI1 | Ideal
From $623
Compare at $1,574
Save 79.1%IGI | 3.11ct | Cushion | H | VVS2 | Excellent
From $629
Compare at $3,010
Save 77.3%IGI | 3.17ct | Cushion | H | VS1 | Excellent
From $630
Compare at $2,780
Save 59.4%IGI | 3.11ct | Cushion | F | VS1 | Very Good
From $643
Compare at $1,584
Save 76.4%IGI | 3.12ct | Cushion | FANCY | SI1 | Good
From $669
Compare at $2,838
IGI | 3.12ct | Cushion | H | VS1 | Ideal
From $673
Compare at $3,220
Save 51.4%IGI | 3.19ct | Cushion | H | VVS2 | Ideal
From $680
Compare at $1,398
Save 79.9%IGI | 3.16ct | Cushion | I | SI1 | Ideal
From $694
Compare at $3,450
Save 79.9%IGI | 3.11ct | Cushion | H | SI1 | Ideal
From $697
Compare at $3,470
Save 59.9%IGI | 3.11ct | Cushion | E | VVS2 | Very Good
From $701
Compare at $1,747
Save 76.7%IGI | 3.12ct | Cushion | D | VS2 | Ideal
From $704
Compare at $3,025
Save 59.9%IGI | 3.12ct | Cushion | E | VVS2 | Ideal
From $704
Compare at $1,757
Save 64.9%IGI | 3.16ct | Cushion | H | VS1 | Ideal
From $706
Compare at $2,010
Save 60.5%IGI | 3.13ct | Cushion | D | VS1 | Very Good
From $708
Compare at $1,791
Save 59.5%IGI | 3.11ct | Cushion | E | VVS2 | Very Good
From $708
Compare at $1,747
IGI | 3.2ct | Cushion | FANCY | VS1 | Very Good
From $715
Compare at $1,981
Save 57.6%IGI | 3.18ct | Cushion | E | VS1 | Excellent
From $718
Compare at $1,695
Save 54.1%IGI | 3.15ct | Cushion | E | VS2 | Very Good
From $719
Compare at $1,565
Save 46.9%IGI | 3.12ct | Cushion | E | SI1 | Very Good
From $720
Compare at $1,355
Save 57.7%IGI | 3.19ct | Cushion | E | VS1 | Excellent
From $721
Compare at $1,704
Save 47.1%IGI | 3.11ct | Cushion | G | VS1 | Ideal
From $729
Compare at $1,379
Save 58.3%IGI | 3.13ct | Cushion | E | VVS2 | Very Good
From $733
Compare at $1,756
Save 47.7%IGI | 3.15ct | Cushion | G | VS1 | Ideal
From $738
Compare at $1,412
Save 13.2%IGI | 3.14ct | Cushion | G | VS1 | Very Good
From $743
Compare at $856
Save 72.4%IGI | 3.11ct | Cushion | FANCY | VS1 | Very Good
From $750
Compare at $2,716
Save 54%IGI | 3.19ct | Cushion | F | VS1 | Very Good
From $756
Compare at $1,643
Save 53.9%IGI | 3.14ct | Cushion | E | VS1 | Very Good
From $757
Compare at $1,641
Save 53.3%IGI | 3.18ct | Cushion | F | VS1 | Ideal
From $760
Compare at $1,627
Save 46.9%IGI | 3.11ct | Cushion | F | VS2 | Ideal
From $762
Compare at $1,435
Save 51.8%IGI | 3.2ct | Cushion | E | VS2 | Very Good
From $763
Compare at $1,583
Save 54.3%IGI | 3.14ct | Cushion | E | VS1 | Ideal
From $764
Compare at $1,671
Save 46.1%IGI | 3.11ct | Cushion | G | VS1 | Ideal
From $766
Compare at $1,421
Save 48.1%IGI | 3.16ct | Cushion | G | VVS2 | Ideal
From $766
Compare at $1,475
Save 79.9%IGI | 3.11ct | Cushion | I | VVS2 | Very Good
From $767
Compare at $3,810
Save 79.9%IGI | 3.12ct | Cushion | I | VVS2 | Very Good
From $769
Compare at $3,820
Save 48.4%IGI | 3.18ct | Cushion | G | VVS2 | Ideal
From $770
Compare at $1,493
Save 52%IGI | 3.14ct | Cushion | F | VS1 | Ideal
From $771
Compare at $1,606
Save 58.4%IGI | 3.17ct | Cushion | D | VS1 | Excellent
From $771
Compare at $1,853
Save 29.2%IGI | 3.16ct | Cushion | H | VVS2 | Ideal
From $777
Compare at $1,097
Save 48.2%IGI | 3.18ct | Cushion | F | VS2 | Very Good
From $779
Compare at $1,505
Entry pricing in this category starts around $458.
What to Know When Shopping for 3.1 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $12,832 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 $1,860 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.
- Cushion cuts come in standard and modified brilliant varieties. Modified brilliants tend to show more fire, while standard cushions have broader facets.
Frequently Asked Questions
We currently track 419 comparable stones in this segment. Prices start around $458 and go up to $13,290.
Based on the latest market data, the average asking price is about $2,674 with a median around $1,860.
The observed spread is roughly $12,832 across tracked listings, which is about 96.6% 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 $2,674. The median price is $1,860, 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 $12,832 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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