3.9 Carat Marquise Lab Grown Diamond Prices Comparison
As of February 2026, 3.9 carat marquise lab grown diamonds usually range from $725 to $17,682, with an average price of $2,152.In the last month, prices for these diamonds are up 0.6%.Compare 65 verified listings across 6 retailers tracked by CaratRadar.
3.9 Carat Marquise Lab Grown Diamond Market Overview
CaratRadar currently tracks 65 verified 3.9-carat marquise lab grown diamonds listed across 6 online retailers. Prices in this segment range from $725 to $17,682, with an average asking price of $2,152 and a median of $1,408.
The price spread of $16,957 (95.9% 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.
65 diamonds tracked in this segment
Price range: $725 to $17,682
Average price: $2,152
Median price: $1,408
Available across 6 retailers
Savings potential: up to 95.9%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
65
$725
$2,152
$1,408
$17,682
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 74%3.86ct | Marquise | D | VVS2 | Ideal
From $2,792
Compare at $10,750
IGISave 17.3%3.86ct | Marquise | E | VVS2 | Very Good
From $1,705
Compare at $2,061
IGISave 49.7%3.86ct | Marquise | H | VS1 | Ideal
From $859
Compare at $1,708
GIASave 73.9%3.86ct | Marquise | E | VVS2 | Excellent
From $3,892
Compare at $14,922
IGISave 32.9%3.86ct | Marquise | F | VS1 | Ideal
From $1,327
Compare at $1,978
IGISave 19.4%3.86ct | Marquise | G | VS1 | Very Good
From $886
Compare at $1,099
3.86ct | Marquise | F | VS1 | Excellent
From $1,100
Compare at $5,690
IGISave 81.8%3.86ct | Marquise | G | VS1 | Ideal
From $769
Compare at $4,230
IGISave 57.7%3.87ct | Marquise | H | VS1 | Ideal
From $725
Compare at $1,713
IGISave 82.2%3.87ct | Marquise | D | VS1 | Ideal
From $1,578
Compare at $8,890
IGISave 85.6%3.87ct | Marquise | E | VS1 | Excellent
From $1,393
Compare at $9,650
IGISave 84.7%3.87ct | Marquise | F | VS1 | Ideal
From $1,330
Compare at $8,680
3.87ct | Marquise | F | VS1 | Excellent
From $1,090
Compare at $5,460
IGISave 81.5%3.87ct | Marquise | E | VVS2 | Very Good
From $1,715
Compare at $9,260
IGISave 35.4%3.87ct | Marquise | H | VVS2 | Very Good
From $763
Compare at $1,180
GIASave 60.5%3.88ct | Marquise | F | VS1 | Excellent
From $5,269
Compare at $13,350
IGISave 32.5%3.88ct | Marquise | D | VS1 | Ideal
From $1,614
Compare at $2,391
IGISave 85.6%3.88ct | Marquise | F | VVS2 | Excellent
From $1,426
Compare at $9,930
IGISave 76.9%3.88ct | Marquise | F | VVS2 | Ideal
From $1,934
Compare at $8,360
IGISave 69.5%3.88ct | Marquise | F | VS1 | Very Good
From $936
Compare at $3,065
IGISave 74%3.88ct | Marquise | D | VVS2 | Ideal
From $2,805
Compare at $10,810
IGISave 77.8%3.89ct | Marquise | G | VS1 | Ideal
From $1,748
Compare at $7,870
IGISave 33.7%3.89ct | Marquise | F | VVS2 | Excellent
From $1,429
Compare at $2,157
IGISave 33%3.89ct | Marquise | F | VS1 | Ideal
From $1,336
Compare at $1,993
IGISave 75.6%3.89ct | Marquise | E | VS1 | Excellent
From $1,655
Compare at $6,780
IGISave 47.2%3.89ct | Marquise | F | VVS2 | Very Good
From $1,260
Compare at $2,386
IGISave 80.5%3.89ct | Marquise | E | VS1 | Very Good
From $1,762
Compare at $9,040
IGISave 76.5%3.89ct | Marquise | E | VS1 | Ideal
From $1,384
Compare at $5,880
IGISave 76.9%3.89ct | Marquise | F | VVS2 | Very Good
From $1,939
Compare at $8,380
IGISave 40%3.89ct | Marquise | E | VVS2 | Excellent
From $1,516
Compare at $2,525
IGISave 77.1%3.89ct | Marquise | F | VVS2 | Ideal
From $2,214
Compare at $9,680
IGISave 83.7%3.89ct | Marquise | E | VS1 | Very Good
From $974
Compare at $5,990
IGISave 82%3.9ct | Marquise | D | VVS1 | Excellent
From $4,258
Compare at $23,680
IGISave 57.3%3.9ct | Marquise | E | VS2 | Very Good
From $1,387
Compare at $3,251
IGISave 68.3%3.9ct | Marquise | F | VS1 | Very Good
From $940
Compare at $2,960
IGISave 63.9%3.9ct | Marquise | F | VS1 | Ideal
From $1,113
Compare at $3,080
IGISave 10.7%3.9ct | Marquise | E | VS1 | Ideal
From $6,162
Compare at $6,900
IGISave 84.8%3.9ct | Marquise | F | VS1 | Excellent
From $1,168
Compare at $7,670
IGISave 69.5%3.9ct | Marquise | F | VS1 | Very Good
From $940
Compare at $3,080
IGISave 49.8%3.91ct | Marquise | H | VS1 | Ideal
From $856
Compare at $1,704
IGISave 82%3.91ct | Marquise | D | VVS1 | Ideal
From $4,268
Compare at $23,740
IGISave 69.2%3.91ct | Marquise | D | VS1 | Ideal
From $2,933
Compare at $9,510
IGISave 51.6%3.91ct | Marquise | D | VVS1 | Ideal
From $3,688
Compare at $7,618
IGISave 70.9%3.91ct | Marquise | D | VVS1 | Excellent
From $3,677
Compare at $12,640
IGISave 17.4%3.91ct | Marquise | D | VS1 | Very Good
From $1,148
Compare at $1,391
GIASave 54%3.92ct | Marquise | D | VVS2 | Excellent
From $4,487
Compare at $9,746
IGISave 52.3%3.92ct | Marquise | F | VVS2 | Very Good
From $1,644
Compare at $3,444
IGISave 54.1%3.92ct | Marquise | D | IF | Ideal
From $8,590
Compare at $18,730
IGISave 49.8%3.92ct | Marquise | H | VS1 | Ideal
From $858
Compare at $1,708
IGISave 33.6%3.92ct | Marquise | F | VVS2 | Excellent
From $1,408
Compare at $2,120
Entry pricing in this category starts around $725.
What to Know When Shopping for 3.9 Carat Marquise Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $16,957 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 $1,408 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 65 comparable stones in this segment. Prices start around $725 and go up to $17,682.
Based on the latest market data, the average asking price is about $2,152 with a median around $1,408.
The observed spread is roughly $16,957 across tracked listings, which is about 95.9% 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 $1,408, 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 6 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 $16,957 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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