3.4 Carat Cushion Lab Grown Diamond Prices Comparison
As of July 2026, 3.4 carat cushion lab grown diamonds usually range from $500 to $21,952, with an average price of $3,490.In the last month, prices for these diamonds are down 3.4%.Compare 148 verified listings across 9 retailers tracked by CaratRadar.
3.4 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 148 verified 3.4-carat cushion lab grown diamonds listed across 9 online retailers. Prices in this segment range from $500 to $21,952, with an average asking price of $3,490 and a median of $2,480.
The price spread of $21,452 (97.7% 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.
148 diamonds tracked in this segment
Price range: $500 to $21,952
Average price: $3,490
Median price: $2,480
Available across 9 retailers
Savings potential: up to 97.7%
Price Range Overview
As of Jul 9, 2026Real market range for this carat, shape, and diamond type.
148
$500
$3,490
$2,480
$21,952
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 74.1%IGI | 3.43ct | Cushion | H | VVS2 | Excellent
From $547
Compare at $2,114
Save 66.2%IGI | 3.41ct | Cushion | E | VS1 | Very Good
From $642
Compare at $1,897
IGI | 3.47ct | Cushion | F | VS1 | Very Good
From $654
Compare at $696
Save 61.5%IGI | 3.43ct | Cushion | F | VS2 | Very Good
From $662
Compare at $1,719
Save 64.3%IGI | 3.43ct | Cushion | F | VS1 | Ideal
From $667
Compare at $1,870
IGI | 3.45ct | Cushion | F | VVS2 | Excellent
From $711
Compare at $756
Save 70.9%IGI | 3.4ct | Cushion | E | VVS2 | Very Good
From $718
Compare at $2,464
Save 61.9%IGI | 3.41ct | Cushion | F | VVS2 | Very Good
From $723
Compare at $1,897
Save 78.1%IGI | 3.44ct | Cushion | F | VVS2 | Very Good
From $723
Compare at $3,308
Save 74.2%IGI | 3.42ct | Cushion | FANCY | VS1 | Very Good
From $725
Compare at $2,815
Save 57.7%IGI | 3.42ct | Cushion | F | VS2 | Very Good
From $731
Compare at $1,727
Save 78.2%IGI | 3.46ct | Cushion | E | VVS2 | Ideal
From $740
Compare at $3,387
Save 64.9%IGI | 3.41ct | Cushion | E | VVS2 | Excellent
From $744
Compare at $2,119
Save 64.8%IGI | 3.48ct | Cushion | H | VS1 | Ideal
From $745
Compare at $2,116
Save 30.5%IGI | 3.48ct | Cushion | D | VS1 | Very Good
From $745
Compare at $1,072
Save 78.1%IGI | 3.45ct | Cushion | E | VVS2 | Excellent
From $745
Compare at $3,408
Save 61.2%IGI | 3.4ct | Cushion | F | VVS2 | Ideal
From $746
Compare at $1,925
Save 64.6%IGI | 3.41ct | Cushion | E | VVS2 | Very Good
From $751
Compare at $2,119
Save 71.6%IGI | 3.49ct | Cushion | E | VS1 | Very Good
From $755
Compare at $2,659
Save 62.1%IGI | 3.45ct | Cushion | E | VS1 | Very Good
From $755
Compare at $1,994
Save 65.4%IGI | 3.47ct | Cushion | E | VVS2 | Excellent
From $756
Compare at $2,186
Save 64.9%IGI | 3.45ct | Cushion | E | VVS2 | Ideal
From $760
Compare at $2,166
Save 68.6%IGI | 3.49ct | Cushion | E | VVS2 | Ideal
From $769
Compare at $2,447
Save 65.3%IGI | 3.49ct | Cushion | E | VVS2 | Ideal
From $769
Compare at $2,213
Save 67.5%IGI | 3.49ct | Cushion | E | VS2 | Very Good
From $769
Compare at $2,367
Save 73.1%IGI | 3.48ct | Cushion | E | VS1 | Excellent
From $770
Compare at $2,864
Save 63.2%IGI | 3.43ct | Cushion | D | VS1 | Ideal
From $789
Compare at $2,142
Save 75.4%IGI | 3.48ct | Cushion | FANCY | VS1 | Very Good
From $792
Compare at $3,226
Save 57.2%IGI | 3.42ct | Cushion | F | VS1 | Very Good
From $795
Compare at $1,857
Save 23.2%IGI | 3.49ct | Cushion | E | VVS2 | Very Good
From $811
Compare at $1,056
IGI | 3.49ct | Cushion | E | VVS2 | Ideal
From $815
IGI | 3.43ct | Cushion | G | VS2 | Very Good
From $819
Compare at $895
Save 50%IGI | 3.44ct | Cushion | G | VS1 | Very Good
From $829
Compare at $1,658
Save 23.8%IGI | 3.41ct | Cushion | F | VS1 | Excellent
From $831
Compare at $1,090
Save 23.7%IGI | 3.44ct | Cushion | F | VS1 | Ideal
From $838
Compare at $1,099
Save 71.6%IGI | 3.4ct | Cushion | D | VVS2 | Very Good
From $845
Compare at $2,979
Save 23.7%IGI | 3.48ct | Cushion | F | VS1 | Very Good
From $848
Compare at $1,112
Save 67.5%IGI | 3.44ct | Cushion | F | VVS2 | Very Good
From $849
Compare at $2,609
Save 76.9%IGI | 3.4ct | Cushion | G | VS2 | Ideal
From $856
Compare at $3,700
Save 67.5%IGI | 3.44ct | Cushion | E | VVS2 | Excellent
From $856
Compare at $2,630
Save 78%IGI | 3.44ct | Cushion | G | VS2 | Ideal
From $865
Compare at $3,940
Save 79.2%IGI | 3.41ct | Cushion | D | VS2 | Ideal
From $880
Compare at $4,230
Save 78.2%IGI | 3.42ct | Cushion | E | VVS1 | Excellent
From $917
Compare at $4,208
Save 27.8%IGI | 3.44ct | Cushion | H | VS1 | Ideal
From $920
Compare at $1,274
Save 57.7%IGI | 3.49ct | Cushion | E | VVS2 | Good
From $927
Compare at $2,194
Save 67.2%IGI | 3.41ct | Cushion | D | VVS2 | Excellent
From $937
Compare at $2,853
Save 67.2%IGI | 3.43ct | Cushion | D | VVS2 | Very Good
From $940
Compare at $2,869
Save 76.5%IGI | 3.43ct | Cushion | FANCY | VS1 | Excellent
From $944
Compare at $4,012
Save 78.4%IGI | 3.47ct | Cushion | D | VVS1 | Excellent
From $960
Compare at $4,449
Save 19.6%IGI | 3.4ct | Cushion | D | VVS2 | Very Good
From $978
Compare at $1,216
Entry pricing in this category starts around $500.
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 $21,452 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 $2,480 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 148 comparable stones in this segment. Prices start around $500 and go up to $21,952.
Based on the latest market data, the average asking price is about $3,490 with a median around $2,480.
The observed spread is roughly $21,452 across tracked listings, which is about 97.7% 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 $3,490. The median price is $2,480, 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 $21,452 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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