3.9 Carat Marquise Lab Grown Diamond Prices Comparison
As of May 2026, 3.9 carat marquise lab grown diamonds usually range from $596 to $11,924, with an average price of $3,003.In the last month, prices for these diamonds are down 9.4%.Compare 57 verified listings across 6 retailers tracked by CaratRadar.
3.9 Carat Marquise Lab Grown Diamond Market Overview
CaratRadar currently tracks 57 verified 3.9-carat marquise lab grown diamonds listed across 6 online retailers. Prices in this segment range from $596 to $11,924, with an average asking price of $3,003 and a median of $2,190.
The price spread of $11,328 (95.0% 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.
57 diamonds tracked in this segment
Price range: $596 to $11,924
Average price: $3,003
Median price: $2,190
Available across 6 retailers
Savings potential: up to 95.0%
Price Range Overview
As of May 30, 2026Real market range for this carat, shape, and diamond type.
57
$596
$3,003
$2,190
$11,924
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 26.2%IGI | 3.99ct | Marquise | G | VS2 | Ideal
From $772
Compare at $1,046
Save 63.5%IGI | 3.91ct | Marquise | F | VS1 | Excellent
From $799
Compare at $2,191
Save 41.9%IGI | 3.9ct | Marquise | H | VS2 | Excellent
From $839
Compare at $1,445
Save 74.1%IGI | 3.92ct | Marquise | E | VS1 | Very Good
From $843
Compare at $3,250
Save 73.8%IGI | 3.98ct | Marquise | E | VS1 | Excellent
From $865
Compare at $3,300
Save 79.6%IGI | 3.9ct | Marquise | E | VVS2 | Ideal
From $875
Compare at $4,290
Save 78.8%IGI | 3.9ct | Marquise | E | VVS2 | Excellent
From $875
Compare at $4,130
Save 79.6%IGI | 3.9ct | Marquise | E | VVS2 | Excellent
From $875
Compare at $4,290
Save 78.8%IGI | 3.9ct | Marquise | E | VVS2 | Excellent
From $875
Compare at $4,130
IGI | 3.91ct | Marquise | E | VVS2 | Excellent
From $877
Compare at $2,530
IGI | 3.94ct | Marquise | E | VVS2 | Excellent
From $883
Compare at $2,567
Save 79.4%IGI | 3.9ct | Marquise | E | VVS2 | Ideal
From $883
Compare at $4,290
Save 78.6%IGI | 3.9ct | Marquise | E | VVS2 | Very Good
From $883
Compare at $4,130
Save 78.8%IGI | 3.98ct | Marquise | E | VVS2 | Excellent
From $892
Compare at $4,215
Save 62.2%IGI | 3.91ct | Marquise | F | VVS2 | Very Good
From $907
Compare at $2,398
Save 62.2%IGI | 3.9ct | Marquise | F | VVS2 | Very Good
From $931
Compare at $2,462
Save 61.7%IGI | 3.99ct | Marquise | E | VS1 | Ideal
From $943
Compare at $2,459
Save 62%IGI | 3.9ct | Marquise | E | VVS2 | Ideal
From $958
Compare at $2,520
Save 62%IGI | 3.9ct | Marquise | E | VVS2 | Ideal
From $958
Compare at $2,520
Save 61.9%IGI | 3.9ct | Marquise | E | VVS2 | Excellent
From $958
Compare at $2,517
Save 61.7%IGI | 3.9ct | Marquise | E | VVS2 | Ideal
From $966
Compare at $2,522
Save 72.9%IGI | 3.95ct | Marquise | FANCY | VS2 | Very Good
From $1,161
Compare at $4,280
Save 56%IGI | 3.95ct | Marquise | E | VVS2 | Very Good
From $1,172
Compare at $2,663
Save 74.3%IGI | 3.9ct | Marquise | F | VS2 | Ideal
From $1,191
Compare at $4,630
Save 52.2%IGI | 3.93ct | Marquise | E | VVS2 | Very Good
From $1,260
Compare at $2,638
Save 52.7%IGI | 3.97ct | Marquise | E | VVS2 | Very Good
From $1,272
Compare at $2,688
Save 53.7%IGI | 3.99ct | Marquise | D | VS1 | Very Good
From $1,330
Compare at $2,874
Save 53.2%IGI | 3.97ct | Marquise | D | VS1 | Very Good
From $1,332
Compare at $2,849
Save 39.1%IGI | 3.93ct | Marquise | F | VS1 | Very Good
From $1,373
Compare at $2,254
Save 69.5%IGI | 3.99ct | Marquise | E | VVS1 | Very Good
From $1,380
Compare at $4,523
Save 55.8%IGI | 3.97ct | Marquise | D | VVS2 | Very Good
From $1,409
Compare at $3,190
Save 54.1%IGI | 3.97ct | Marquise | D | VVS2 | Very Good
From $1,481
Compare at $3,224
Save 54.2%IGI | 3.98ct | Marquise | D | VVS2 | Very Good
From $1,484
Compare at $3,239
Save 54.3%IGI | 3.99ct | Marquise | D | VVS2 | Very Good
From $1,488
Compare at $3,255
Save 70.1%IGI | 3.9ct | Marquise | F | VS1 | Very Good
From $1,493
Compare at $4,990
Save 71.5%IGI | 3.9ct | Marquise | F | VS1 | Very Good
From $1,493
Compare at $5,240
Save 72.9%IGI | 3.9ct | Marquise | FANCY | VS1 | Very Good
From $1,498
Compare at $5,519
Save 65.5%IGI | 3.94ct | Marquise | F | VS2 | Very Good
From $1,521
Compare at $4,410
Save 65.5%IGI | 3.94ct | Marquise | F | VS2 | Very Good
From $1,521
Compare at $4,410
IGI | 3.9ct | Marquise | E | VS1 | Excellent
From $1,624
Compare at $6,600
Save 77.5%IGI | 3.93ct | Marquise | E | VS1 | Ideal
From $1,636
Compare at $7,270
Save 76.5%IGI | 3.93ct | Marquise | E | VS1 | Very Good
From $1,636
Compare at $6,960
Save 34.2%IGI | 3.9ct | Marquise | E | VS1 | Excellent
From $1,681
Compare at $2,555
IGI | 3.99ct | Marquise | E | VS1 | Very Good
From $1,687
Compare at $7,700
Save 48%IGI | 3.96ct | Marquise | D | VVS2 | Very Good
From $1,697
Compare at $3,263
Save 36.4%IGI | 3.98ct | Marquise | E | VS1 | Ideal
From $1,703
Compare at $2,679
Save 78.3%IGI | 3.92ct | Marquise | E | VVS2 | Excellent
From $2,061
Compare at $9,500
Save 53.8%IGI | 3.99ct | Marquise | D | VVS2 | Ideal
From $2,320
Compare at $5,025
Save 68.5%IGI | 3.91ct | Marquise | D | VVS1 | Ideal
From $2,367
Compare at $7,505
Save 73.8%IGI | 3.92ct | Marquise | E | VVS1 | Excellent
From $2,451
Compare at $9,358
Entry pricing in this category starts around $596.
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 $11,328 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 $2,190 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 57 comparable stones in this segment. Prices start around $596 and go up to $11,924.
Based on the latest market data, the average asking price is about $3,003 with a median around $2,190.
The observed spread is roughly $11,328 across tracked listings, which is about 95.0% 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 $3,003. The median price is $2,190, 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 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 $11,328 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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