3.4 Carat Marquise Lab Grown Diamond Prices Comparison
As of May 2026, 3.4 carat marquise lab grown diamonds usually range from $493 to $30,131, with an average price of $3,263.In the last month, prices for these diamonds are down 8.9%.Compare 59 verified listings across 6 retailers tracked by CaratRadar.
3.4 Carat Marquise Lab Grown Diamond Market Overview
CaratRadar currently tracks 59 verified 3.4-carat marquise lab grown diamonds listed across 6 online retailers. Prices in this segment range from $493 to $30,131, with an average asking price of $3,263 and a median of $2,249.
The price spread of $29,638 (98.4% 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.
59 diamonds tracked in this segment
Price range: $493 to $30,131
Average price: $3,263
Median price: $2,249
Available across 6 retailers
Savings potential: up to 98.4%
Price Range Overview
As of May 29, 2026Real market range for this carat, shape, and diamond type.
59
$493
$3,263
$2,249
$30,131
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 74.1%IGI | 3.49ct | Marquise | F | VS1 | Excellent
From $686
Compare at $2,650
IGI | 3.47ct | Marquise | G | VS1 | Very Good
From $698
Compare at $1,666
Save 58.1%IGI | 3.46ct | Marquise | G | VS2 | Ideal
From $703
Compare at $1,678
Save 60.9%IGI | 3.44ct | Marquise | E | VS1 | Very Good
From $767
Compare at $1,963
Save 60.4%IGI | 3.42ct | Marquise | E | VS1 | Excellent
From $770
Compare at $1,943
Save 61.4%IGI | 3.48ct | Marquise | E | VS1 | Excellent
From $775
Compare at $2,006
Save 60.9%IGI | 3.47ct | Marquise | E | VS1 | Excellent
From $780
Compare at $1,997
Save 61%IGI | 3.48ct | Marquise | E | VS1 | Excellent
From $783
Compare at $2,008
Save 61.5%IGI | 3.4ct | Marquise | E | VVS2 | Very Good
From $801
Compare at $2,079
Save 58.6%IGI | 3.41ct | Marquise | E | VS1 | Very Good
From $804
Compare at $1,941
Save 61.5%IGI | 3.43ct | Marquise | E | VVS2 | Excellent
From $809
Compare at $2,100
Save 59.1%IGI | 3.46ct | Marquise | E | VS1 | Very Good
From $822
Compare at $2,010
Save 62.1%IGI | 3.49ct | Marquise | E | VVS2 | Excellent
From $822
Compare at $2,170
Save 60.9%IGI | 3.41ct | Marquise | E | VVS2 | Very Good
From $824
Compare at $2,110
Save 80%IGI | 3.41ct | Marquise | E | VS2 | Excellent
From $852
Compare at $4,260
Save 56.2%IGI | 3.44ct | Marquise | E | VS1 | Very Good
From $865
Compare at $1,977
Save 53.3%IGI | 3.4ct | Marquise | F | VS1 | Very Good
From $867
Compare at $1,857
Save 77.8%IGI | 3.49ct | Marquise | F | VS2 | Ideal
From $871
Compare at $3,930
Save 78.4%IGI | 3.42ct | Marquise | F | VS2 | Ideal
From $874
Compare at $4,050
Save 51.4%IGI | 3.4ct | Marquise | F | VS1 | Excellent
From $888
Compare at $1,826
Save 77.3%IGI | 3.48ct | Marquise | F | VS2 | Very Good
From $889
Compare at $3,920
Save 51.7%IGI | 3.47ct | Marquise | F | VS1 | Excellent
From $916
Compare at $1,898
Save 72.4%IGI | 3.4ct | Marquise | FANCY | VVS2 | Very Good
From $918
Compare at $3,327
IGI | 3.44ct | Marquise | E | VS1 | Ideal
From $926
Compare at $2,457
Save 52.1%IGI | 3.44ct | Marquise | F | VVS2 | Very Good
From $928
Compare at $1,936
Save 52.3%IGI | 3.46ct | Marquise | F | VVS2 | Excellent
From $933
Compare at $1,957
IGI | 3.45ct | Marquise | FANCY | VVS2 | Very Good
From $1,002
Compare at $3,627
Save 35.8%IGI | 3.42ct | Marquise | G | VS1 | Very Good
From $1,063
Compare at $1,656
Save 74.9%IGI | 3.41ct | Marquise | E | VS2 | Excellent
From $1,070
Compare at $4,260
Save 72.9%IGI | 3.45ct | Marquise | FANCY | VVS2 | Very Good
From $1,135
Compare at $4,185
Save 48.3%IGI | 3.45ct | Marquise | E | VVS2 | Very Good
From $1,145
Compare at $2,213
Save 51.4%IGI | 3.43ct | Marquise | D | VVS2 | Very Good
From $1,233
Compare at $2,536
Save 70.7%IGI | 3.49ct | Marquise | G | VVS2 | Ideal
From $1,244
Compare at $4,240
Save 79.7%IGI | 3.41ct | Marquise | E | VS1 | Ideal
From $1,268
Compare at $6,260
Save 66.3%IGI | 3.44ct | Marquise | G | VS1 | Ideal
From $1,269
Compare at $3,770
Save 73.8%IGI | 3.49ct | Marquise | H | VS1 | Ideal
From $1,282
Compare at $4,900
Save 63.5%IGI | 3.49ct | Marquise | G | VS2 | Ideal
From $1,293
Compare at $3,540
Save 67%IGI | 3.47ct | Marquise | F | VVS1 | Excellent
From $1,302
Compare at $3,941
Save 78.3%IGI | 3.4ct | Marquise | E | VS1 | Ideal
From $1,302
Compare at $6,000
Save 27.8%IGI | 3.49ct | Marquise | F | VS1 | Excellent
From $1,305
Compare at $1,808
IGI | 3.49ct | Marquise | E | VS1 | Excellent
From $1,310
Compare at $5,640
Save 79.1%IGI | 3.48ct | Marquise | D | VVS2 | Very Good
From $1,323
Compare at $6,320
Save 79.9%IGI | 3.46ct | Marquise | E | VS1 | Ideal
From $1,325
Compare at $6,600
Save 64.4%IGI | 3.44ct | Marquise | F | VS2 | Very Good
From $1,370
Compare at $3,850
Save 46.3%IGI | 3.48ct | Marquise | D | VVS2 | Ideal
From $1,414
Compare at $2,634
Save 28.4%IGI | 3.44ct | Marquise | E | VVS2 | Ideal
From $1,440
Compare at $2,011
Save 75.5%IGI | 3.49ct | Marquise | F | VS1 | Very Good
From $1,470
Compare at $5,990
Save 28.7%IGI | 3.46ct | Marquise | D | VS1 | Very Good
From $1,474
Compare at $2,068
Save 75.5%IGI | 3.4ct | Marquise | F | VS1 | Excellent
From $1,475
Compare at $6,010
Save 65.7%IGI | 3.48ct | Marquise | E | VS2 | Excellent
From $1,481
Compare at $4,320
Entry pricing in this category starts around $493.
What to Know When Shopping for 3.4 Carat Marquise Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $29,638 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 $2,249 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 59 comparable stones in this segment. Prices start around $493 and go up to $30,131.
Based on the latest market data, the average asking price is about $3,263 with a median around $2,249.
The observed spread is roughly $29,638 across tracked listings, which is about 98.4% 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 $3,263. The median price is $2,249, 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 $29,638 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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