3.8 Carat Marquise Lab Grown Diamond Prices Comparison
As of February 2026, 3.8 carat marquise lab grown diamonds usually range from $783 to $8,181, with an average price of $2,183.In the last month, prices for these diamonds are down 0.9%.Compare 104 verified listings across 7 retailers tracked by CaratRadar.
3.8 Carat Marquise Lab Grown Diamond Market Overview
CaratRadar currently tracks 104 verified 3.8-carat marquise lab grown diamonds listed across 7 online retailers. Prices in this segment range from $783 to $8,181, with an average asking price of $2,183 and a median of $1,454.
The price spread of $7,398 (90.4% 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.
104 diamonds tracked in this segment
Price range: $783 to $8,181
Average price: $2,183
Median price: $1,454
Available across 7 retailers
Savings potential: up to 90.4%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
104
$783
$2,183
$1,454
$8,181
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 58.3%3.75ct | Marquise | H | VS1 | Excellent
From $874
Compare at $2,097
IGISave 80.1%3.75ct | Marquise | E | VVS2 | Very Good
From $1,830
Compare at $9,193
GIASave 57.4%3.75ct | Marquise | E | VVS1 | Ideal
From $4,435
Compare at $10,410
IGISave 68.1%3.75ct | Marquise | F | VS2 | Very Good
From $909
Compare at $2,850
IGISave 76.9%3.75ct | Marquise | E | VS1 | Very Good
From $1,873
Compare at $8,120
IGISave 81.1%3.75ct | Marquise | D | VS1 | Excellent
From $2,200
Compare at $11,640
IGISave 71.5%3.75ct | Marquise | F | VS1 | Ideal
From $2,567
Compare at $8,990
IGISave 55.2%3.75ct | Marquise | E | VVS1 | Very Good
From $4,660
Compare at $10,410
IGISave 81.7%3.75ct | Marquise | D | VVS2 | Ideal
From $2,718
Compare at $14,850
GIASave 55.1%3.76ct | Marquise | H | VVS2 | Ideal
From $3,952
Compare at $8,810
GIASave 68.5%3.76ct | Marquise | D | VS1 | Excellent
From $7,171
Compare at $22,800
IGISave 81.5%3.76ct | Marquise | E | VVS2 | Very Good
From $1,667
Compare at $8,990
IGISave 84.1%3.76ct | Marquise | E | VS2 | Ideal
From $1,143
Compare at $7,180
IGISave 82.7%3.76ct | Marquise | F | VVS1 | Ideal
From $1,570
Compare at $9,090
IGISave 76.4%3.77ct | Marquise | E | VS1 | Ideal
From $1,341
Compare at $5,690
IGISave 43.3%3.77ct | Marquise | E | VVS1 | Ideal
From $5,974
Compare at $10,530
IGI3.77ct | Marquise | E | VVS2 | Excellent
From $8,181
Compare at $8,640
IGISave 76.8%3.77ct | Marquise | E | VVS2 | Very Good
From $1,965
Compare at $8,450
IGISave 81.4%3.77ct | Marquise | D | VVS2 | Excellent
From $2,271
Compare at $12,230
IGISave 70.5%3.77ct | Marquise | D | VVS1 | Ideal
From $3,595
Compare at $12,190
GCALSave 76.8%3.77ct | Marquise | E | VVS2 | Excellent
From $1,961
Compare at $8,450
IGISave 63.9%3.77ct | Marquise | F | VS1 | Very Good
From $1,073
Compare at $2,975
IGISave 67.1%3.77ct | Marquise | F | VS2 | Ideal
From $1,389
Compare at $4,220
IGISave 88.3%3.77ct | Marquise | E | VS1 | Excellent
From $1,028
Compare at $8,760
IGISave 84.4%3.77ct | Marquise | F | VVS2 | Ideal
From $1,374
Compare at $8,830
IGISave 81.5%3.77ct | Marquise | E | VVS2 | Very Good
From $1,671
Compare at $9,020
IGISave 81.5%3.77ct | Marquise | D | VVS1 | Excellent
From $4,392
Compare at $23,680
IGISave 85.1%3.78ct | Marquise | F | SI1 | Ideal
From $907
Compare at $6,090
IGISave 78.3%3.78ct | Marquise | F | VVS2 | Excellent
From $2,097
Compare at $9,680
GIASave 76.5%3.78ct | Marquise | D | VVS2 | Excellent
From $5,030
Compare at $21,360
IGISave 91.8%3.78ct | Marquise | G | VS2 | Ideal
From $1,104
Compare at $13,470
IGISave 86.4%3.78ct | Marquise | E | VVS2 | Excellent
From $1,239
Compare at $9,090
IGISave 50.5%3.78ct | Marquise | F | VS1 | Very Good
From $1,287
Compare at $2,601
IGISave 76.1%3.78ct | Marquise | G | VS1 | Ideal
From $1,755
Compare at $7,340
IGISave 75.8%3.78ct | Marquise | F | VVS1 | Ideal
From $3,486
Compare at $14,390
IGISave 59.6%3.79ct | Marquise | D | IF | Excellent
From $7,469
Compare at $18,480
IGISave 11.6%3.79ct | Marquise | E | VVS2 | Excellent
From $6,367
Compare at $7,200
IGISave 29.8%3.79ct | Marquise | E | VVS2 | Ideal
From $6,367
Compare at $9,070
GIASave 69.2%3.79ct | Marquise | D | VVS2 | Excellent
From $7,660
Compare at $24,890
IGISave 33%3.79ct | Marquise | F | VS1 | Excellent
From $1,337
Compare at $1,996
IGISave 81.1%3.79ct | Marquise | G | VS1 | Ideal
From $783
Compare at $4,150
IGISave 44.5%3.79ct | Marquise | H | VS1 | Ideal
From $932
Compare at $1,678
IGISave 81.7%3.79ct | Marquise | E | VS1 | Very Good
From $1,612
Compare at $8,810
IGISave 47.1%3.8ct | Marquise | F | VVS2 | Excellent
From $1,268
Compare at $2,399
IGISave 81%3.8ct | Marquise | F | VS1 | Very Good
From $922
Compare at $4,860
GCALSave 67.1%3.8ct | Marquise | E | VVS2 | Ideal
From $5,713
Compare at $17,350
IGISave 62.4%3.8ct | Marquise | E | VVS1 | Ideal
From $3,993
Compare at $10,620
IGISave 54.7%3.8ct | Marquise | E | VS1 | Very Good
From $1,435
Compare at $3,168
IGISave 81.5%3.8ct | Marquise | E | VVS2 | Very Good
From $1,685
Compare at $9,090
IGISave 60.7%3.8ct | Marquise | G | VS1 | Ideal
From $992
Compare at $2,522
Entry pricing in this category starts around $783.
What to Know When Shopping for 3.8 Carat Marquise Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $7,398 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 $1,454 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.
- Marquise diamonds maximize carat weight face-up and appear larger than their actual weight. Check symmetry carefully.
Frequently Asked Questions
We currently track 104 comparable stones in this segment. Prices start around $783 and go up to $8,181.
Based on the latest market data, the average asking price is about $2,183 with a median around $1,454.
The observed spread is roughly $7,398 across tracked listings, which is about 90.4% 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 $1,454, 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 7 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 $7,398 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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