3.4 Carat Marquise Lab Grown Diamond Prices Comparison
As of February 2026, 3.4 carat marquise lab grown diamonds usually range from $703 to $10,730, with an average price of $1,733.In the last month, prices for these diamonds are down 1%.Compare 120 verified listings across 5 retailers tracked by CaratRadar.
3.4 Carat Marquise Lab Grown Diamond Market Overview
CaratRadar currently tracks 120 verified 3.4-carat marquise lab grown diamonds listed across 5 online retailers. Prices in this segment range from $703 to $10,730, with an average asking price of $1,733 and a median of $1,015.
The price spread of $10,027 (93.5% 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.
120 diamonds tracked in this segment
Price range: $703 to $10,730
Average price: $1,733
Median price: $1,015
Available across 5 retailers
Savings potential: up to 93.5%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
120
$703
$1,733
$1,015
$10,730
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 81.5%3.36ct | Marquise | E | VVS2 | Very Good
From $1,491
Compare at $8,040
IGISave 21.2%3.36ct | Marquise | F | VVS1 | Very Good
From $1,505
Compare at $1,911
IGISave 82.3%3.36ct | Marquise | F | VS1 | Excellent
From $997
Compare at $5,620
IGISave 77.5%3.36ct | Marquise | D | IF | Ideal
From $10,572
Compare at $46,890
IGISave 55.6%3.37ct | Marquise | E | IF | Ideal
From $5,496
Compare at $12,370
IGISave 66.5%3.37ct | Marquise | D | VVS2 | Very Good
From $1,364
Compare at $4,075
IGISave 79.9%3.37ct | Marquise | F | VS2 | Ideal
From $795
Compare at $3,960
IGISave 67.9%3.37ct | Marquise | F | VS1 | Excellent
From $823
Compare at $2,560
IGISave 84.8%3.37ct | Marquise | E | VS2 | Excellent
From $986
Compare at $6,475
IGISave 13.5%3.37ct | Marquise | E | VVS1 | Ideal
From $9,369
Compare at $10,830
IGISave 81.5%3.37ct | Marquise | D | IF | Ideal
From $9,143
Compare at $49,410
IGISave 66.7%3.37ct | Marquise | D | VVS1 | Ideal
From $3,616
Compare at $10,850
IGISave 84.1%3.37ct | Marquise | F | VS1 | Ideal
From $1,054
Compare at $6,630
IGISave 84.1%3.37ct | Marquise | E | VS1 | Ideal
From $1,242
Compare at $7,800
IGISave 62.6%3.37ct | Marquise | D | VVS1 | Ideal
From $4,078
Compare at $10,900
IGISave 86.1%3.37ct | Marquise | F | VVS2 | Excellent
From $999
Compare at $7,180
IGISave 76.1%3.37ct | Marquise | E | VVS2 | Ideal
From $1,252
Compare at $5,240
IGISave 63.8%3.37ct | Marquise | E | VVS1 | Very Good
From $3,370
Compare at $9,310
GIASave 61.9%3.38ct | Marquise | D | VVS1 | Excellent
From $6,836
Compare at $17,939
IGISave 68.3%3.38ct | Marquise | F | VS1 | Very Good
From $847
Compare at $2,670
IGISave 85%3.38ct | Marquise | F | VVS2 | Ideal
From $1,074
Compare at $7,150
IGISave 85%3.38ct | Marquise | F | VVS2 | Excellent
From $1,074
Compare at $7,150
IGISave 85.3%3.38ct | Marquise | E | VS1 | Ideal
From $1,270
Compare at $8,660
IGISave 78.8%3.38ct | Marquise | E | VS1 | Very Good
From $1,532
Compare at $7,220
IGISave 84.9%3.38ct | Marquise | F | VS1 | Excellent
From $1,001
Compare at $6,650
IGISave 88.1%3.38ct | Marquise | E | VVS2 | Excellent
From $962
Compare at $8,080
IGISave 81.2%3.38ct | Marquise | D | VVS2 | Excellent
From $1,976
Compare at $10,510
IGISave 81.5%3.38ct | Marquise | D | IF | Ideal
From $9,168
Compare at $49,550
IGISave 86.6%3.38ct | Marquise | G | VS2 | Ideal
From $711
Compare at $5,300
IGI3.38ct | Marquise | E | VVS2 | Excellent
From $6,253
Compare at $6,420
IGISave 75.3%3.39ct | Marquise | F | VVS2 | Ideal
From $1,790
Compare at $7,250
IGISave 92.3%3.39ct | Marquise | G | VS1 | Ideal
From $1,198
Compare at $15,471
GIASave 78.7%3.39ct | Marquise | F | VVS1 | Ideal
From $4,990
Compare at $23,460
IGISave 87%3.39ct | Marquise | E | VS2 | Ideal
From $849
Compare at $6,510
IGISave 81.1%3.39ct | Marquise | F | VS1 | Ideal
From $819
Compare at $4,330
IGISave 80.7%3.39ct | Marquise | E | VS1 | Ideal
From $956
Compare at $4,940
IGISave 61.1%3.39ct | Marquise | D | VVS2 | Very Good
From $1,426
Compare at $3,662
IGISave 86.6%3.39ct | Marquise | E | VS2 | Ideal
From $877
Compare at $6,535
IGISave 85.8%3.39ct | Marquise | E | VVS2 | Very Good
From $1,149
Compare at $8,110
IGISave 78.4%3.39ct | Marquise | G | VS1 | Ideal
From $885
Compare at $4,100
IGISave 86.6%3.39ct | Marquise | G | VS2 | Ideal
From $712
Compare at $5,320
IGISave 84.6%3.4ct | Marquise | F | VS1 | Excellent
From $944
Compare at $6,130
IGISave 84.8%3.4ct | Marquise | E | VS1 | Ideal
From $1,105
Compare at $7,260
IGISave 34.9%3.4ct | Marquise | E | VS1 | Ideal
From $2,697
Compare at $4,143
IGISave 80.8%3.4ct | Marquise | F | VS1 | Very Good
From $955
Compare at $4,970
IGISave 76.2%3.4ct | Marquise | F | VS1 | Ideal
From $1,031
Compare at $4,340
IGISave 84.3%3.4ct | Marquise | D | VVS2 | Very Good
From $1,478
Compare at $9,420
IGISave 33.1%3.4ct | Marquise | F | VVS1 | Very Good
From $2,944
Compare at $4,402
IGISave 85.3%3.4ct | Marquise | E | VS1 | Ideal
From $1,249
Compare at $8,480
IGISave 34.1%3.4ct | Marquise | E | VVS2 | Very Good
From $1,135
Compare at $1,722
Entry pricing in this category starts around $703.
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 $10,027 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 $1,015 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 120 comparable stones in this segment. Prices start around $703 and go up to $10,730.
Based on the latest market data, the average asking price is about $1,733 with a median around $1,015.
The observed spread is roughly $10,027 across tracked listings, which is about 93.5% 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 $1,015, 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 5 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 $10,027 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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