4 Carat Cushion Lab Grown Diamond Prices Comparison
As of May 2026, 4 carat cushion lab grown diamonds usually range from $144 to $27,308, with an average price of $3,604.In the last month, prices for these diamonds are down 5.3%.Compare 1,699 verified listings across 10 retailers tracked by CaratRadar.
4 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 1,699 verified 4-carat cushion lab grown diamonds listed across 10 online retailers. Prices in this segment range from $144 to $27,308, with an average asking price of $3,604 and a median of $2,370.
The price spread of $27,164 (99.5% 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.
1,699 diamonds tracked in this segment
Price range: $144 to $27,308
Average price: $3,604
Median price: $2,370
Available across 10 retailers
Savings potential: up to 99.5%
Price Range Overview
As of May 30, 2026Real market range for this carat, shape, and diamond type.
1,699
$144
$3,604
$2,370
$27,308
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 79.1%IGI | 4.01ct | Cushion | H | VS2 | Ideal
From $609
Compare at $2,920
IGI | 4.02ct | Cushion | FANCY | VS2 | Ideal
From $629
Compare at $2,276
Save 60.3%IGI | 4.01ct | Cushion | I | VS1 | Ideal
From $677
Compare at $1,706
Save 70.8%IGI | 4.08ct | Cushion | K | VS1 | Ideal
From $692
Compare at $2,370
Save 70.1%IGI | 4.03ct | Cushion | H | VS2 | Excellent
From $719
Compare at $2,401
Save 69.9%IGI | 4.03ct | Cushion | G | SI1 | Ideal
From $722
Compare at $2,399
Save 60.6%IGI | 4.01ct | Cushion | G | VS1 | Ideal
From $732
Compare at $1,859
Save 60.6%IGI | 4.01ct | Cushion | G | VS1 | Very Good
From $732
Compare at $1,859
Save 29.5%IGI | 4.01ct | Cushion | G | VVS2 | Very Good
From $732
Compare at $1,038
Save 60.8%IGI | 4.03ct | Cushion | G | VS1 | Very Good
From $735
Compare at $1,877
Save 60.1%IGI | 4ct | Cushion | G | VS1 | Very Good
From $739
Compare at $1,853
Save 57.3%IGI | 4ct | Cushion | F | SI1 | Very Good
From $741
Compare at $1,737
Save 57.5%IGI | 4.02ct | Cushion | F | SI1 | Very Good
From $744
Compare at $1,752
Save 60.8%IGI | 4.02ct | Cushion | E | VS2 | Very Good
From $751
Compare at $1,918
Save 63.1%IGI | 4.08ct | Cushion | G | VVS2 | Very Good
From $752
Compare at $2,038
Save 64.6%IGI | 4.01ct | Cushion | E | VS1 | Very Good
From $753
Compare at $2,127
Save 61.9%IGI | 4.03ct | Cushion | F | VS2 | Very Good
From $756
Compare at $1,985
Save 59.5%IGI | 4.06ct | Cushion | G | VS2 | Very Good
From $757
Compare at $1,867
Save 59.5%IGI | 4.07ct | Cushion | G | VS2 | Very Good
From $759
Compare at $1,875
Save 60.5%IGI | 4.02ct | Cushion | F | VS1 | Very Good
From $759
Compare at $1,923
Save 70%IGI | 4ct | Cushion | H | VVS2 | Ideal
From $762
Compare at $2,541
Save 59.7%IGI | 4ct | Cushion | E | VS2 | Excellent
From $762
Compare at $1,890
Save 70.1%IGI | 4.01ct | Cushion | H | VS1 | Ideal
From $763
Compare at $2,548
Save 60.6%IGI | 4.09ct | Cushion | G | VS1 | Ideal
From $763
Compare at $1,935
Save 59.9%IGI | 4ct | Cushion | F | VS1 | Very Good
From $764
Compare at $1,907
Save 58.9%IGI | 4.06ct | Cushion | G | VS2 | Very Good
From $764
Compare at $1,858
Save 60.5%IGI | 4.05ct | Cushion | E | VS2 | Very Good
From $764
Compare at $1,934
Save 59.6%IGI | 4ct | Cushion | E | VS2 | Very Good
From $764
Compare at $1,891
Save 61.3%IGI | 4.09ct | Cushion | E | VS2 | Very Good
From $765
Compare at $1,979
Save 59.7%IGI | 4.01ct | Cushion | E | VS2 | Very Good
From $766
Compare at $1,900
Save 62.4%IGI | 4.09ct | Cushion | F | VS2 | Good
From $767
Compare at $2,042
Save 63.9%IGI | 4.01ct | Cushion | E | VS1 | Very Good
From $767
Compare at $2,127
Save 60.6%IGI | 4.04ct | Cushion | F | VS1 | Very Good
From $767
Compare at $1,945
Save 63.9%IGI | 4.01ct | Cushion | E | VS1 | Very Good
From $767
Compare at $2,127
Save 70%IGI | 4.03ct | Cushion | H | VS1 | Ideal
From $768
Compare at $2,561
Save 70%IGI | 4.03ct | Cushion | H | VS1 | Ideal
From $768
Compare at $2,561
Save 58.3%IGI | 4ct | Cushion | G | VS1 | Very Good
From $772
Compare at $1,851
Save 59.3%IGI | 4.01ct | Cushion | E | VS2 | Very Good
From $774
Compare at $1,903
Save 59.3%IGI | 4.05ct | Cushion | G | VS1 | Very Good
From $774
Compare at $1,904
Save 76.7%IGI | 4.07ct | Cushion | G | SI1 | Ideal
From $778
Compare at $3,340
Save 59.7%IGI | 4.01ct | Cushion | F | VS1 | Very Good
From $778
Compare at $1,929
Save 59.8%IGI | 4.02ct | Cushion | F | VS1 | Very Good
From $779
Compare at $1,937
Save 58.9%IGI | 4.04ct | Cushion | G | VS1 | Excellent
From $780
Compare at $1,897
Save 58.9%IGI | 4.07ct | Cushion | G | VS1 | Very Good
From $785
Compare at $1,912
Save 60.6%IGI | 4.02ct | Cushion | G | VVS2 | Very Good
From $785
Compare at $1,992
Save 59.9%IGI | 4.07ct | Cushion | E | VS2 | Very Good
From $785
Compare at $1,956
Save 60.1%IGI | 4.05ct | Cushion | F | VS1 | Good
From $785
Compare at $1,965
Save 63.2%IGI | 4.02ct | Cushion | E | VS1 | Ideal
From $785
Compare at $2,133
Save 59.4%IGI | 4.03ct | Cushion | F | VS1 | Very Good
From $787
Compare at $1,938
Save 60.1%IGI | 4.06ct | Cushion | F | VS1 | Very Good
From $787
Compare at $1,974
Entry pricing in this category starts around $144.
What to Know When Shopping for 4 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $27,164 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 $2,370 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 1,699 comparable stones in this segment. Prices start around $144 and go up to $27,308.
Based on the latest market data, the average asking price is about $3,604 with a median around $2,370.
The observed spread is roughly $27,164 across tracked listings, which is about 99.5% 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 $3,604. The median price is $2,370, 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 $27,164 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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