3.8 Carat Cushion Lab Grown Diamond Prices Comparison
As of May 2026, 3.8 carat cushion lab grown diamonds usually range from $548 to $26,852, with an average price of $4,236.In the last month, prices for these diamonds are down 8.2%.Compare 150 verified listings across 9 retailers tracked by CaratRadar.
3.8 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 150 verified 3.8-carat cushion lab grown diamonds listed across 9 online retailers. Prices in this segment range from $548 to $26,852, with an average asking price of $4,236 and a median of $3,046.
The price spread of $26,304 (98.0% 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.
150 diamonds tracked in this segment
Price range: $548 to $26,852
Average price: $4,236
Median price: $3,046
Available across 9 retailers
Savings potential: up to 98.0%
Price Range Overview
As of May 29, 2026Real market range for this carat, shape, and diamond type.
150
$548
$4,236
$3,046
$26,852
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 73.8%IGI | 3.8ct | Cushion | I | VS2 | Ideal
From $518
Compare at $1,975
Save 72.4%IGI | 3.81ct | Cushion | FANCY | VVS2 | Very Good
From $766
Compare at $2,773
Save 74.5%IGI | 3.88ct | Cushion | E | VS2 | Ideal
From $795
Compare at $3,112
Save 61.1%IGI | 3.81ct | Cushion | F | VS1 | Very Good
From $809
Compare at $2,078
Save 55.8%IGI | 3.81ct | Cushion | G | VS1 | Very Good
From $844
Compare at $1,909
Save 72.4%IGI | 3.84ct | Cushion | FANCY | VS2 | Very Good
From $858
Compare at $3,105
Save 64.2%IGI | 3.81ct | Cushion | E | VVS2 | Very Good
From $861
Compare at $2,405
Save 72.4%IGI | 3.81ct | Cushion | FANCY | VS2 | Very Good
From $876
Compare at $3,173
Save 47.7%IGI | 3.86ct | Cushion | G | VVS2 | Ideal
From $895
Compare at $1,712
Save 72.4%IGI | 3.84ct | Cushion | FANCY | VS2 | Very Good
From $900
Compare at $3,260
Save 57.3%IGI | 3.81ct | Cushion | F | VS1 | Ideal
From $902
Compare at $2,110
Save 62.8%IGI | 3.81ct | Cushion | E | VVS2 | Very Good
From $904
Compare at $2,429
Save 59.5%IGI | 3.83ct | Cushion | F | VVS2 | Very Good
From $918
Compare at $2,267
Save 18.1%IGI | 3.85ct | Cushion | F | VVS2 | Excellent
From $921
Compare at $1,124
Save 72.4%IGI | 3.86ct | Cushion | FANCY | VS1 | Very Good
From $948
Compare at $3,433
Save 59%IGI | 3.86ct | Cushion | E | VS1 | Very Good
From $955
Compare at $2,328
Save 59.3%IGI | 3.88ct | Cushion | F | VVS2 | Very Good
From $960
Compare at $2,359
Save 75%IGI | 3.89ct | Cushion | E | SI1 | Very Good
From $974
Compare at $3,900
Save 72.4%IGI | 3.83ct | Cushion | FANCY | VS1 | Very Good
From $983
Compare at $3,562
Save 59.6%IGI | 3.82ct | Cushion | E | VVS2 | Very Good
From $987
Compare at $2,445
Save 65.9%IGI | 3.84ct | Cushion | D | VVS2 | Very Good
From $992
Compare at $2,908
Save 65.1%IGI | 3.8ct | Cushion | D | VVS2 | Very Good
From $998
Compare at $2,856
Save 60.1%IGI | 3.87ct | Cushion | E | VVS2 | Very Good
From $1,000
Compare at $2,505
Save 79.7%IGI | 3.8ct | Cushion | F | VS1 | Excellent
From $1,002
Compare at $4,930
Save 77.4%IGI | 3.81ct | Cushion | G | VVS2 | Ideal
From $1,005
Compare at $4,450
Save 78.7%IGI | 3.88ct | Cushion | F | VS1 | Ideal
From $1,012
Compare at $4,760
Save 72.4%IGI | 3.8ct | Cushion | FANCY | VS1 | Very Good
From $1,018
Compare at $3,687
Save 55.3%IGI | 3.84ct | Cushion | E | VS1 | Very Good
From $1,040
Compare at $2,329
Save 60.3%IGI | 3.84ct | Cushion | D | VS1 | Excellent
From $1,043
Compare at $2,625
Save 55.2%IGI | 3.85ct | Cushion | E | VS1 | Very Good
From $1,051
Compare at $2,347
Save 49.9%IGI | 3.85ct | Cushion | F | VS1 | Very Good
From $1,059
Compare at $2,113
Save 57.5%IGI | 3.85ct | Cushion | E | VVS2 | Very Good
From $1,061
Compare at $2,498
Save 59.2%IGI | 3.84ct | Cushion | D | VS1 | Very Good
From $1,074
Compare at $2,632
Save 57%IGI | 3.86ct | Cushion | E | VVS2 | Very Good
From $1,080
Compare at $2,514
Save 53.6%IGI | 3.84ct | Cushion | F | VVS2 | Very Good
From $1,093
Compare at $2,355
Save 63.2%IGI | 3.87ct | Cushion | D | VVS2 | Very Good
From $1,097
Compare at $2,982
Save 46.6%IGI | 3.81ct | Cushion | F | VS1 | Ideal
From $1,112
Compare at $2,082
Save 61.5%IGI | 3.86ct | Cushion | D | VVS2 | Very Good
From $1,142
Compare at $2,966
Save 75.9%IGI | 3.89ct | Cushion | F | VS1 | Very Good
From $1,150
Compare at $4,770
Save 50.4%IGI | 3.8ct | Cushion | E | VS1 | Very Good
From $1,150
Compare at $2,317
Save 54.8%IGI | 3.82ct | Cushion | E | VVS2 | Ideal
From $1,152
Compare at $2,550
Save 78.9%IGI | 3.81ct | Cushion | E | VS1 | Very Good
From $1,160
Compare at $5,490
Save 48.9%IGI | 3.84ct | Cushion | F | VVS2 | Good
From $1,205
Compare at $2,359
Save 60%IGI | 3.87ct | Cushion | D | VVS2 | Very Good
From $1,215
Compare at $3,041
Save 76.2%IGI | 3.81ct | Cushion | F | VVS2 | Ideal
From $1,263
Compare at $5,300
Save 38.8%IGI | 3.87ct | Cushion | G | VS1 | Very Good
From $1,266
Compare at $2,070
Save 22.9%IGI | 3.83ct | Cushion | E | VVS1 | Excellent
From $1,306
Compare at $1,695
Save 75%IGI | 3.85ct | Cushion | F | VVS1 | Very Good
From $1,312
Compare at $5,256
Save 36.4%IGI | 3.85ct | Cushion | E | VS1 | Excellent
From $1,325
Compare at $2,082
Save 50.1%IGI | 3.84ct | Cushion | D | VS1 | Very Good
From $1,331
Compare at $2,669
Entry pricing in this category starts around $548.
What to Know When Shopping for 3.8 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $26,304 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 $3,046 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 150 comparable stones in this segment. Prices start around $548 and go up to $26,852.
Based on the latest market data, the average asking price is about $4,236 with a median around $3,046.
The observed spread is roughly $26,304 across tracked listings, which is about 98.0% 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 $4,236. The median price is $3,046, 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 $26,304 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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