3 Carat Cushion Lab Grown Diamond Prices Comparison
As of October 2026, 3 carat cushion lab grown diamonds in the 3.00–3.49 carat benchmark range usually range from $342 to $26,080, with an average price of $2,400.In the last month, prices for these diamonds are up 0.6%.Compare 7,843 verified listings across 19 retailers tracked by CaratRadar.
3 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 7,843 verified 3-carat cushion lab grown diamonds in the 3.00–3.49 carat benchmark range, listed across 19 online retailers. Prices in this segment range from $342 to $26,080, with an average asking price of $2,400 and a median of $1,700.
The price spread of $25,738 (98.7% 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 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.
7,843 diamonds tracked in the 3.00–3.49 carat benchmark
Price range: $342 to $26,080
Average price: $2,400
Median price: $1,700
Available across 19 retailers
Savings potential: up to 98.7%
Price Range Overview
As of Oct 14, 2026Real market range for this carat, shape, and diamond type.
7,843
$342
$2,400
$1,700
$26,080
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 79.1%IGI | 3.01ct | Cushion | G | SI1 | Ideal
From $467
Compare at $2,230
Save 76.2%IGI | 3.03ct | Cushion | H | VS2 | Ideal
From $477
Compare at $2,000
Save 51.1%IGI | 3.04ct | Cushion | E | VVS2 | Very Good
From $513
Compare at $1,050
Save 79.5%IGI | 3.05ct | Cushion | F | SI1 | Ideal
From $525
Compare at $2,560
Save 71.8%IGI | 3.04ct | Cushion | E | VS2 | Excellent
From $530
Compare at $1,877
IGI | 3.01ct | Cushion | I | VVS2 | Ideal
From $534
Compare at $535
Save 47.7%IGI | 3.04ct | Cushion | G | VS1 | Very Good
From $537
Compare at $1,027
Save 63.4%IGI | 3.14ct | Cushion | H | SI1 | Ideal
From $540
Compare at $1,476
Save 46.7%IGI | 3.04ct | Cushion | H | VVS2 | Excellent
From $545
Compare at $1,023
Save 78.2%IGI | 3.05ct | Cushion | G | VS2 | Very Good
From $547
Compare at $2,510
Save 50.4%IGI | 3.01ct | Cushion | F | VS2 | Very Good
From $547
Compare at $1,102
Save 68.5%IGI | 3.01ct | Cushion | G | VVS2 | Excellent
From $560
Compare at $1,776
Save 74.7%IGI | 3.04ct | Cushion | F | VS1 | Excellent
From $566
Compare at $2,238
Save 68.7%IGI | 3.09ct | Cushion | G | VS2 | Very Good
From $568
Compare at $1,813
Save 66.2%IGI | 3.02ct | Cushion | G | VVS2 | Very Good
From $570
Compare at $1,684
Save 77.6%IGI | 3.04ct | Cushion | F | SI1 | Very Good
From $570
Compare at $2,550
Save 47%IGI | 3.04ct | Cushion | G | VVS2 | Very Good
From $573
Compare at $1,081
Save 34.8%IGI | 3.01ct | Cushion | F | VS2 | Good
From $575
Compare at $882
Save 48.1%IGI | 3.01ct | Cushion | F | VS2 | Excellent
From $575
Compare at $1,108
Save 68.4%IGI | 3.09ct | Cushion | G | VVS2 | Excellent
From $575
Compare at $1,819
Save 44.4%IGI | 3.01ct | Cushion | G | VS1 | Very Good
From $575
Compare at $1,034
Save 44.7%IGI | 3.02ct | Cushion | G | VS1 | Excellent
From $576
Compare at $1,041
Save 44.7%IGI | 3.02ct | Cushion | G | VS1 | Good
From $576
Compare at $1,041
Save 67.3%IGI | 3.02ct | Cushion | E | VS1 | Good
From $578
Compare at $1,766
Save 32.6%IGI | 3.09ct | Cushion | E | VS1 | Ideal
From $578
Compare at $857
Save 47.2%IGI | 3.04ct | Cushion | G | VVS2 | Good
From $580
Compare at $1,099
Save 47.5%IGI | 3.08ct | Cushion | G | VVS2 | Very Good
From $581
Compare at $1,107
Save 55.3%IGI | 3.05ct | Cushion | E | VS1 | Very Good
From $583
Compare at $1,304
Save 55.3%IGI | 3.05ct | Cushion | E | VS1 | Very Good
From $583
Compare at $1,304
Save 42.5%IGI | 3ct | Cushion | G | VS1 | Very Good
From $584
Compare at $1,016
Save 76.7%IGI | 3.32ct | Cushion | H | VS1 | Ideal
From $586
Compare at $2,510
Save 72.2%IGI | 3ct | Cushion | E | VS1 | Fair
From $586
Compare at $2,105
Save 66.2%IGI | 3.08ct | Cushion | G | VVS2 | Excellent
From $587
Compare at $1,739
Save 75.5%IGI | 3.25ct | Cushion | G | VVS2 | Excellent
From $587
Compare at $2,393
Save 68.3%IGI | 3.25ct | Cushion | E | VS2 | Ideal
From $590
Compare at $1,861
Save 23.4%IGI | 3ct | Cushion | G | VS2 | Very Good
From $592
Compare at $773
Save 31.2%IGI | 3.04ct | Cushion | I | VS1 | Very Good
From $592
Compare at $860
Save 68.3%IGI | 3.23ct | Cushion | G | VS1 | Very Good
From $593
Compare at $1,872
Save 45.9%IGI | 3.06ct | Cushion | G | VVS2 | Very Good
From $595
Compare at $1,100
Save 46.2%IGI | 3.05ct | Cushion | G | VVS2 | Ideal
From $596
Compare at $1,108
Save 31.7%IGI | 3.07ct | Cushion | I | VS1 | Good
From $598
Compare at $875
Save 50%IGI | 3.06ct | Cushion | F | VS1 | Excellent
From $598
Compare at $1,196
Save 47.4%IGI | 3.02ct | Cushion | F | VS2 | Excellent
From $598
Compare at $1,136
Save 18.6%IGI | 3.01ct | Cushion | J | VS1 | Ideal
From $600
Compare at $737
Save 75.7%IGI | 3.01ct | Cushion | H | VVS2 | Excellent
From $600
Compare at $2,470
Save 25.5%IGI | 3.17ct | Cushion | J | VS1 | Good
From $601
Compare at $807
Save 52.3%IGI | 3.01ct | Cushion | E | VS1 | Very Good
From $603
Compare at $1,263
Save 67.7%IGI | 3.03ct | Cushion | F | VS1 | Excellent
From $607
Compare at $1,878
Save 63.3%IGI | 3.04ct | Cushion | F | VS1 | Excellent
From $609
Compare at $1,659
Save 47.7%IGI | 3.01ct | Cushion | F | VS1 | Good
From $609
Compare at $1,165
Entry pricing in this benchmark range starts around $342.
What to Know When Shopping for 3 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $25,738 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 $1,700 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 7,843 comparable stones in the 3.00–3.49 carat benchmark range. Prices start around $342 and go up to $26,080.
Based on the latest market data, the average asking price is about $2,400 with a median around $1,700.
The observed spread is roughly $25,738 across tracked listings, which is about 98.7% from highest to lowest offer in the 3.00–3.49 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 $2,400. The median price is $1,700, 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 19 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 $25,738 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 3.00–3.49 carat Cushion diamond benchmark.