3.8 Carat Cushion Lab Grown Diamond Prices Comparison
As of February 2026, 3.8 carat cushion lab grown diamonds usually range from $838 to $25,452, with an average price of $2,967.In the last month, prices for these diamonds are down 5.3%.Compare 351 verified listings across 11 retailers tracked by CaratRadar.
3.8 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 351 verified 3.8-carat cushion lab grown diamonds listed across 11 online retailers. Prices in this segment range from $838 to $25,452, with an average asking price of $2,967 and a median of $1,976.
The price spread of $24,614 (96.7% 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.
351 diamonds tracked in this segment
Price range: $838 to $25,452
Average price: $2,967
Median price: $1,976
Available across 11 retailers
Savings potential: up to 96.7%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
351
$838
$2,967
$1,976
$25,452
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
IGISave 51.6%3.75ct | Cushion | J | VVS2 | Very Good
From $886
Compare at $1,829
GCALSave 76.8%3.75ct | Cushion | E | VS2 | Excellent
From $1,794
Compare at $7,740
GIASave 80.3%3.75ct | Cushion | D | VVS1 | Excellent
From $3,320
Compare at $16,870
IGISave 84.2%3.75ct | Cushion | G | VS1 | Ideal
From $1,119
Compare at $7,070
IGISave 86.7%3.75ct | Cushion | G | VS1 | Ideal
From $943
Compare at $7,070
IGISave 87.7%3.75ct | Cushion | E | VS1 | Ideal
From $1,166
Compare at $9,470
IGISave 34.7%3.75ct | Cushion | D | VVS2 | Very Good
From $2,963
Compare at $4,535
IGISave 14.9%3.75ct | Cushion | E | VVS1 | Ideal
From $8,475
Compare at $9,960
IGISave 18.6%3.75ct | Cushion | E | VVS2 | Very Good
From $1,095
Compare at $1,346
IGISave 84.2%3.75ct | Cushion | F | VS1 | Very Good
From $1,253
Compare at $7,910
IGISave 17.3%3.75ct | Cushion | E | VVS2 | Very Good
From $1,547
Compare at $1,871
IGISave 73.7%3.75ct | Cushion | D | VVS1 | Excellent
From $2,884
Compare at $10,970
GIA3.75ct | Cushion | D | VVS1 | Ideal
From $23,980
Compare at $25,637
GIASave 70.6%3.75ct | Cushion | E | VVS2 | Excellent
From $2,680
Compare at $9,120
GIASave 85.6%3.75ct | Cushion | D | IF | Excellent
From $4,856
Compare at $33,720
IGISave 74.6%3.75ct | Cushion | G | VS1 | Very Good
From $1,167
Compare at $4,600
IGISave 84.2%3.75ct | Cushion | G | VS1 | Ideal
From $1,119
Compare at $7,070
IGISave 71.6%3.75ct | Cushion | D | VS1 | Ideal
From $2,033
Compare at $7,150
IGISave 83.2%3.75ct | Cushion | E | VS1 | Ideal
From $1,450
Compare at $8,650
IGISave 83.7%3.75ct | Cushion | F | VS2 | Very Good
From $1,229
Compare at $7,530
IGISave 75.5%3.75ct | Cushion | G | VS1 | Ideal
From $1,763
Compare at $7,200
IGISave 72.4%3.75ct | Cushion | D | VVS1 | Ideal
From $3,262
Compare at $11,820
IGISave 75.5%3.75ct | Cushion | E | VS2 | Very Good
From $1,897
Compare at $7,740
IGISave 72.9%3.75ct | Cushion | D | VVS1 | Excellent
From $3,309
Compare at $12,230
IGISave 83.9%3.75ct | Cushion | H | VVS2 | Ideal
From $1,009
Compare at $6,260
IGISave 57.9%3.75ct | Cushion | G | SI1 | Ideal
From $5,260
Compare at $12,503
IGISave 84.2%3.75ct | Cushion | G | VS1 | Ideal
From $1,119
Compare at $7,070
IGISave 47%3.75ct | Cushion | D | VVS2 | Ideal
From $2,404
Compare at $4,535
IGISave 84.1%3.75ct | Cushion | F | VS2 | Very Good
From $1,199
Compare at $7,530
IGISave 54.1%3.75ct | Cushion | E | VS1 | Very Good
From $1,820
Compare at $3,969
IGISave 48.7%3.75ct | Cushion | D | VVS2 | Very Good
From $2,058
Compare at $4,008
IGISave 71.5%3.76ct | Cushion | E | VS2 | Ideal
From $2,573
Compare at $9,020
GIASave 74.1%3.76ct | Cushion | E | VS1 | Excellent
From $2,635
Compare at $10,190
GIASave 74%3.76ct | Cushion | D | IF | Excellent
From $13,110
Compare at $50,430
IGISave 79.1%3.76ct | Cushion | E | VVS2 | Ideal
From $1,510
Compare at $7,220
IGISave 83.2%3.76ct | Cushion | F | VS1 | Ideal
From $996
Compare at $5,930
IGISave 37.8%3.76ct | Cushion | H | VS2 | Ideal
From $855
Compare at $1,375
IGISave 82.8%3.76ct | Cushion | D | IF | Ideal
From $4,682
Compare at $27,270
IGISave 90.7%3.76ct | Cushion | D | VVS2 | Ideal
From $1,031
Compare at $11,110
IGISave 83.9%3.76ct | Cushion | G | VS1 | Very Good
From $1,159
Compare at $7,220
IGISave 81.1%3.76ct | Cushion | D | VS1 | Ideal
From $1,879
Compare at $9,940
IGISave 52.1%3.76ct | Cushion | E | VVS1 | Ideal
From $2,177
Compare at $4,547
GIASave 72.8%3.76ct | Cushion | E | VS1 | Excellent
From $2,635
Compare at $9,700
GIASave 84.2%3.76ct | Cushion | F | VVS1 | Excellent
From $4,978
Compare at $31,480
IGISave 84.2%3.76ct | Cushion | G | VS1 | Ideal
From $1,122
Compare at $7,090
IGISave 82.8%3.76ct | Cushion | D | IF | Ideal
From $4,682
Compare at $27,270
IGISave 82.2%3.76ct | Cushion | E | IF | Ideal
From $4,435
Compare at $24,890
IGISave 71.5%3.76ct | Cushion | E | VVS2 | Very Good
From $2,471
Compare at $8,660
IGISave 77.1%3.76ct | Cushion | E | VVS2 | Ideal
From $2,084
Compare at $9,110
GCALSave 76.7%3.76ct | Cushion | F | VS1 | Excellent
From $1,846
Compare at $7,930
Entry pricing in this category starts around $838.
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 $24,614 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 $1,976 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 351 comparable stones in this segment. Prices start around $838 and go up to $25,452.
Based on the latest market data, the average asking price is about $2,967 with a median around $1,976.
The observed spread is roughly $24,614 across tracked listings, which is about 96.7% from highest to lowest offer in this bucket.
We refresh pricing data daily so these pages stay current with market changes.
Based on our data, the median price is $1,976, which represents the midpoint of the market. Anything below this figure from a reputable retailer is a solid deal.
We currently track this stone category across 11 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 $24,614 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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