3.4 Carat Cushion Lab Grown Diamond Prices Comparison
As of May 2026, 3.4 carat cushion lab grown diamonds usually range from $516 to $24,233, with an average price of $3,799.In the last month, prices for these diamonds are down 9.5%.Compare 168 verified listings across 9 retailers tracked by CaratRadar.
3.4 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 168 verified 3.4-carat cushion lab grown diamonds listed across 9 online retailers. Prices in this segment range from $516 to $24,233, with an average asking price of $3,799 and a median of $2,770.
The price spread of $23,717 (97.9% 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.
168 diamonds tracked in this segment
Price range: $516 to $24,233
Average price: $3,799
Median price: $2,770
Available across 9 retailers
Savings potential: up to 97.9%
Price Range Overview
As of May 29, 2026Real market range for this carat, shape, and diamond type.
168
$516
$3,799
$2,770
$24,233
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 | 3.43ct | Cushion | H | VVS2 | Excellent
From $612
Compare at $2,043
Save 25%IGI | 3.45ct | Cushion | E | VS1 | Very Good
From $694
Compare at $925
Save 59.3%IGI | 3.43ct | Cushion | F | VS2 | Very Good
From $704
Compare at $1,729
Save 55.9%IGI | 3.48ct | Cushion | H | VS1 | Ideal
From $705
Compare at $1,599
Save 75.2%IGI | 3.49ct | Cushion | H | VS2 | Ideal
From $708
Compare at $2,850
IGI | 3.4ct | Cushion | I | VS1 | Ideal
From $715
Compare at $1,204
Save 61.8%IGI | 3.41ct | Cushion | F | VVS2 | Very Good
From $724
Compare at $1,897
Save 70%IGI | 3.48ct | Cushion | E | VS1 | Excellent
From $731
Compare at $2,436
Save 60.7%IGI | 3.44ct | Cushion | F | VS1 | Very Good
From $737
Compare at $1,874
Save 64.6%IGI | 3.45ct | Cushion | E | VVS2 | Very Good
From $746
Compare at $2,107
Save 62.2%IGI | 3.46ct | Cushion | E | VS1 | Very Good
From $749
Compare at $1,979
Save 63.1%IGI | 3.4ct | Cushion | E | VVS2 | Very Good
From $758
Compare at $2,055
Save 79.4%IGI | 3.47ct | Cushion | F | VS2 | Ideal
From $762
Compare at $3,700
Save 64.9%IGI | 3.48ct | Cushion | D | VS1 | Very Good
From $768
Compare at $2,191
Save 67.4%IGI | 3.4ct | Cushion | E | VS1 | Very Good
From $805
Compare at $2,473
Save 58.8%IGI | 3.44ct | Cushion | F | VVS2 | Very Good
From $810
Compare at $1,968
Save 56.8%IGI | 3.41ct | Cushion | E | VS1 | Very Good
From $823
Compare at $1,904
Save 68.7%IGI | 3.44ct | Cushion | H | VS2 | Very Good
From $836
Compare at $2,670
Save 79.9%IGI | 3.42ct | Cushion | I | VVS2 | Very Good
From $839
Compare at $4,170
Save 72.4%IGI | 3.48ct | Cushion | FANCY | VS1 | Very Good
From $839
Compare at $3,039
Save 72.4%IGI | 3.42ct | Cushion | FANCY | VS1 | Very Good
From $840
Compare at $3,042
Save 23.6%IGI | 3.4ct | Cushion | F | VVS2 | Excellent
From $840
Compare at $1,100
Save 54.8%IGI | 3.42ct | Cushion | F | VS1 | Very Good
From $851
Compare at $1,883
Save 76.9%IGI | 3.4ct | Cushion | G | VS2 | Ideal
From $856
Compare at $3,700
Save 64.5%IGI | 3.45ct | Cushion | D | VVS2 | Very Good
From $859
Compare at $2,422
Save 78%IGI | 3.44ct | Cushion | G | VS2 | Ideal
From $865
Compare at $3,940
Save 79.3%IGI | 3.41ct | Cushion | F | VS1 | Ideal
From $867
Compare at $4,180
Save 13.5%IGI | 3.42ct | Cushion | F | VS1 | Very Good
From $879
Compare at $1,016
Save 48.3%IGI | 3.42ct | Cushion | F | VS2 | Very Good
From $893
Compare at $1,727
Save 79.9%IGI | 3.41ct | Cushion | H | VS1 | Very Good
From $895
Compare at $4,450
Save 79.9%IGI | 3.43ct | Cushion | H | VS1 | Good
From $900
Compare at $4,470
Save 50.2%IGI | 3.48ct | Cushion | F | VS2 | Ideal
From $906
Compare at $1,821
Save 27.5%IGI | 3.4ct | Cushion | E | VVS2 | Very Good
From $906
Compare at $1,250
Save 56%IGI | 3.49ct | Cushion | E | VS1 | Good
From $908
Compare at $2,065
Save 78.2%IGI | 3.42ct | Cushion | F | VS1 | Ideal
From $913
Compare at $4,190
Save 27%IGI | 3.42ct | Cushion | E | VVS2 | Very Good
From $922
Compare at $1,263
Save 61.5%IGI | 3.4ct | Cushion | D | VVS2 | Very Good
From $925
Compare at $2,401
Save 24.2%IGI | 3.4ct | Cushion | D | VVS2 | Excellent
From $934
Compare at $1,232
Save 56.9%IGI | 3.48ct | Cushion | E | VVS2 | Very Good
From $938
Compare at $2,176
Save 77.3%IGI | 3.42ct | Cushion | D | VVS2 | Very Good
From $939
Compare at $4,135
Save 77.3%IGI | 3.42ct | Cushion | D | VVS2 | Very Good
From $939
Compare at $4,135
Save 42.3%IGI | 3.44ct | Cushion | G | VS1 | Very Good
From $957
Compare at $1,658
Save 72.4%IGI | 3.48ct | Cushion | FANCY | VS1 | Excellent
From $972
Compare at $3,518
Save 62.9%IGI | 3.46ct | Cushion | F | VS2 | Very Good
From $974
Compare at $2,625
Save 54.5%IGI | 3.44ct | Cushion | E | VVS2 | Excellent
From $974
Compare at $2,139
Save 23.2%IGI | 3.44ct | Cushion | H | VS1 | Ideal
From $978
Compare at $1,274
Save 54.7%IGI | 3.46ct | Cushion | E | VVS2 | Ideal
From $979
Compare at $2,162
Save 54.8%IGI | 3.47ct | Cushion | E | VVS2 | Excellent
From $982
Compare at $2,174
Save 72.4%IGI | 3.42ct | Cushion | FANCY | VVS1 | Very Good
From $993
Compare at $3,595
Save 73.7%IGI | 3.4ct | Cushion | G | VS1 | Ideal
From $995
Compare at $3,780
Entry pricing in this category starts around $516.
What to Know When Shopping for 3.4 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $23,717 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 $2,770 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 168 comparable stones in this segment. Prices start around $516 and go up to $24,233.
Based on the latest market data, the average asking price is about $3,799 with a median around $2,770.
The observed spread is roughly $23,717 across tracked listings, which is about 97.9% 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 $3,799. The median price is $2,770, 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 9 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 $23,717 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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