3.9 Carat Marquise Lab Grown Diamond Prices Comparison
As of April 2026, 3.9 carat marquise lab grown diamonds usually range from $680 to $13,564, with an average price of $3,597.In the last month, prices for these diamonds are up 1.7%.Compare 63 verified listings across 4 retailers tracked by CaratRadar.
3.9 Carat Marquise Lab Grown Diamond Market Overview
CaratRadar currently tracks 63 verified 3.9-carat marquise lab grown diamonds listed across 4 online retailers. Prices in this segment range from $680 to $13,564, with an average asking price of $3,597 and a median of $2,661.
The price spread of $12,884 (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.
63 diamonds tracked in this segment
Price range: $680 to $13,564
Average price: $3,597
Median price: $2,661
Available across 4 retailers
Savings potential: up to 95.0%
Price Range Overview
As of Apr 14, 2026Real market range for this carat, shape, and diamond type.
63
$680
$3,597
$2,661
$13,564
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 66.5%IGI | 3.9ct | Marquise | F | VS2 | Ideal
From $1,942
Compare at $5,797
Save 24.1%IGI | 3.9ct | Marquise | E | VS1 | Excellent
From $2,555
Compare at $3,365
Save 74.8%IGI | 3.9ct | Marquise | D | VVS1 | Excellent
From $5,550
Compare at $21,990
Save 45.7%IGI | 3.9ct | Marquise | E | VVS1 | Very Good
From $2,475
Compare at $4,561
Save 71.5%IGI | 3.9ct | Marquise | F | VS1 | Very Good
From $1,493
Compare at $5,240
Save 70.1%IGI | 3.9ct | Marquise | F | VS1 | Ideal
From $1,493
Compare at $4,990
Save 74.7%IGI | 3.9ct | Marquise | G | VS2 | Ideal
From $1,003
Compare at $3,970
Save 34.8%IGI | 3.9ct | Marquise | F | VVS2 | Very Good
From $1,243
Compare at $1,907
Save 53.3%IGI | 3.9ct | Marquise | D | VVS1 | Very Good
From $2,650
Compare at $5,678
Save 53.3%IGI | 3.9ct | Marquise | D | VVS1 | Very Good
From $2,650
Compare at $5,678
IGI | 3.9ct | Marquise | E | VS1 | Excellent
From $1,243
Compare at $6,220
Save 47.2%IGI | 3.91ct | Marquise | D | VVS1 | Ideal
From $3,963
Compare at $7,505
Save 84.9%IGI | 3.91ct | Marquise | E | VS1 | Very Good
From $1,315
Compare at $8,720
Save 74.8%IGI | 3.91ct | Marquise | D | VVS1 | Ideal
From $5,563
Compare at $22,050
Save 84.8%IGI | 3.91ct | Marquise | D | VS1 | Very Good
From $1,265
Compare at $8,340
Save 21.7%IGI | 3.91ct | Marquise | F | VVS2 | Very Good
From $1,216
Compare at $1,554
Save 31.8%IGI | 3.91ct | Marquise | F | VVS2 | Very Good
From $1,266
Compare at $1,858
Save 44.6%IGI | 3.91ct | Marquise | F | VVS2 | Very Good
From $895
Compare at $1,616
Save 50.2%IGI | 3.92ct | Marquise | D | IF | Ideal
From $8,296
Compare at $16,666
Save 77.3%IGI | 3.92ct | Marquise | F | VS1 | Excellent
From $1,836
Compare at $8,080
Save 76.8%IGI | 3.92ct | Marquise | F | VVS2 | Excellent
From $1,248
Compare at $5,390
Save 75.5%IGI | 3.92ct | Marquise | F | VS2 | Excellent
From $1,079
Compare at $4,410
Save 75.6%IGI | 3.92ct | Marquise | E | VVS1 | Very Good
From $2,650
Compare at $10,880
Save 78.8%IGI | 3.92ct | Marquise | F | VVS2 | Very Good
From $1,261
Compare at $5,940
Save 62.6%IGI | 3.93ct | Marquise | E | VS1 | Ideal
From $2,486
Compare at $6,650
Save 60.7%IGI | 3.93ct | Marquise | E | VS1 | Very Good
From $2,486
Compare at $6,320
Save 78%IGI | 3.93ct | Marquise | F | VVS2 | Excellent
From $1,251
Compare at $5,680
Save 20.8%IGI | 3.94ct | Marquise | D | IF | Ideal
From $17,682
Compare at $22,336
Save 65.5%IGI | 3.94ct | Marquise | F | VS2 | Very Good
From $1,521
Compare at $4,410
Save 67.1%IGI | 3.94ct | Marquise | F | VS2 | Very Good
From $1,521
Compare at $4,630
Save 74.2%IGI | 3.95ct | Marquise | F | VS1 | Ideal
From $1,445
Compare at $5,610
Save 55.4%IGI | 3.95ct | Marquise | G | VS2 | Very Good
From $951
Compare at $2,133
Save 73%IGI | 3.95ct | Marquise | D | VVS2 | Very Good
From $4,214
Compare at $15,630
IGI | 3.96ct | Marquise | E | VS1 | Very Good
From $1,262
Compare at $6,320
IGI | 3.96ct | Marquise | F | VVS2 | Excellent
From $1,274
Compare at $5,450
Save 61.3%IGI | 3.97ct | Marquise | D | VVS2 | Ideal
From $4,277
Compare at $11,060
IGI | 3.97ct | Marquise | F | VVS1 | Very Good
From $3,670
Compare at $3,670
Save 66.1%IGI | 3.97ct | Marquise | D | VVS1 | Very Good
From $4,357
Compare at $12,840
Save 79.9%IGI | 3.97ct | Marquise | F | VVS2 | Excellent
From $1,264
Compare at $6,300
IGI | 3.97ct | Marquise | E | VVS2 | Very Good
From $1,351
Compare at $6,210
Save 73%IGI | 3.98ct | Marquise | E | VS1 | Ideal
From $1,906
Compare at $7,070
Save 77.1%IGI | 3.98ct | Marquise | F | VS1 | Very Good
From $1,787
Compare at $7,820
Save 79.2%IGI | 3.98ct | Marquise | E | VVS2 | Very Good
From $1,983
Compare at $9,520
IGI | 3.98ct | Marquise | FANCY | VS1 | Ideal
From $2,135
Compare at $3,203
Save 80%IGI | 3.98ct | Marquise | G | VVS2 | Excellent
From $969
Compare at $4,850
Save 77.6%IGI | 3.98ct | Marquise | F | VS1 | Excellent
From $1,137
Compare at $5,080
Save 58.7%IGI | 3.98ct | Marquise | F | VS2 | Very Good
From $1,110
Compare at $2,687
IGI | 3.98ct | Marquise | E | VVS2 | Excellent
From $1,366
Compare at $6,540
Save 41.2%IGI | 3.99ct | Marquise | G | VS2 | Ideal
From $1,280
Compare at $2,175
Save 71.4%IGI | 3.99ct | Marquise | F | VVS2 | Ideal
From $2,712
Compare at $9,500
Entry pricing in this category starts around $680.
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 $12,884 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 $2,661 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 63 comparable stones in this segment. Prices start around $680 and go up to $13,564.
Based on the latest market data, the average asking price is about $3,597 with a median around $2,661.
The observed spread is roughly $12,884 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 our data, the median price is $2,661, 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 4 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 $12,884 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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