3.5 Carat Marquise Lab Grown Diamond Prices Comparison
As of February 2026, 3.5 carat marquise lab grown diamonds usually range from $680 to $14,297, with an average price of $1,745.In the last month, prices for these diamonds are down 2%.Compare 564 verified listings across 13 retailers tracked by CaratRadar.
3.5 Carat Marquise Lab Grown Diamond Market Overview
CaratRadar currently tracks 564 verified 3.5-carat marquise lab grown diamonds listed across 13 online retailers. Prices in this segment range from $680 to $14,297, with an average asking price of $1,745 and a median of $1,195.
The price spread of $13,617 (95.2% 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.
564 diamonds tracked in this segment
Price range: $680 to $14,297
Average price: $1,745
Median price: $1,195
Available across 13 retailers
Savings potential: up to 95.2%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
564
$680
$1,745
$1,195
$14,297
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 53.4%3.46ct | Marquise | G | VS2 | Ideal
From $1,178
Compare at $2,530
IGISave 51.2%3.46ct | Marquise | E | VS1 | Very Good
From $1,029
Compare at $2,109
IGISave 84.5%3.46ct | Marquise | G | VS1 | Ideal
From $736
Compare at $4,760
IGISave 87.6%3.46ct | Marquise | D | VS1 | Ideal
From $1,001
Compare at $8,065
IGISave 86.6%3.46ct | Marquise | G | VS2 | Ideal
From $722
Compare at $5,400
IGISave 85.2%3.46ct | Marquise | G | VS1 | Ideal
From $736
Compare at $4,960
IGISave 67.9%3.46ct | Marquise | H | VS1 | Excellent
From $680
Compare at $2,122
IGISave 48%3.46ct | Marquise | D | IF | Ideal
From $8,283
Compare at $15,930
IGISave 78.8%3.46ct | Marquise | E | VS1 | Very Good
From $1,568
Compare at $7,390
IGISave 19.3%3.46ct | Marquise | E | VVS2 | Excellent
From $6,401
Compare at $7,930
IGISave 34.1%3.47ct | Marquise | E | VVS2 | Very Good
From $1,135
Compare at $1,722
IGISave 83.7%3.47ct | Marquise | G | VS1 | Ideal
From $906
Compare at $5,560
IGISave 85%3.47ct | Marquise | F | VS1 | Excellent
From $833
Compare at $5,570
IGISave 86.2%3.47ct | Marquise | G | VS1 | Very Good
From $737
Compare at $5,360
IGISave 87.5%3.47ct | Marquise | G | VS1 | Ideal
From $737
Compare at $5,895
IGISave 88.3%3.47ct | Marquise | F | VVS2 | Excellent
From $861
Compare at $7,340
IGISave 85.6%3.47ct | Marquise | F | VS1 | Ideal
From $833
Compare at $5,800
IGISave 70.5%3.47ct | Marquise | E | VS2 | Very Good
From $1,271
Compare at $4,310
3.47ct | Marquise | G | VS1 | Very Good
From $737
Compare at $906
IGISave 87.9%3.47ct | Marquise | G | VS1 | Ideal
From $709
Compare at $5,880
IGISave 72%3.47ct | Marquise | F | VVS1 | Excellent
From $2,331
Compare at $8,323
IGISave 69.3%3.47ct | Marquise | F | VS1 | Ideal
From $840
Compare at $2,740
IGISave 84.1%3.47ct | Marquise | E | VS1 | Ideal
From $884
Compare at $5,560
IGISave 88.7%3.47ct | Marquise | G | VVS2 | Excellent
From $735
Compare at $6,510
IGISave 81.9%3.47ct | Marquise | F | VS2 | Excellent
From $812
Compare at $4,480
IGISave 85.7%3.47ct | Marquise | G | VS1 | Ideal
From $737
Compare at $5,170
IGISave 62.2%3.48ct | Marquise | E | VVS1 | Very Good
From $2,253
Compare at $5,955
IGISave 68.1%3.48ct | Marquise | F | VS1 | Excellent
From $842
Compare at $2,640
IGISave 86.2%3.48ct | Marquise | F | VS1 | Ideal
From $835
Compare at $6,040
IGISave 80.4%3.48ct | Marquise | F | VVS2 | Ideal
From $1,447
Compare at $7,390
IGISave 84.4%3.48ct | Marquise | D | VVS2 | Ideal
From $1,508
Compare at $9,640
IGISave 87.3%3.48ct | Marquise | E | VS1 | Ideal
From $893
Compare at $7,060
IGISave 80.7%3.48ct | Marquise | G | VS1 | Very Good
From $739
Compare at $3,820
IGISave 84.2%3.48ct | Marquise | F | VVS1 | Ideal
From $1,298
Compare at $8,210
IGISave 86.9%3.48ct | Marquise | E | VS1 | Excellent
From $893
Compare at $6,810
IGISave 84.8%3.48ct | Marquise | E | VS1 | Ideal
From $886
Compare at $5,820
IGISave 59.9%3.48ct | Marquise | E | VS2 | Excellent
From $1,088
Compare at $2,710
IGISave 85.1%3.48ct | Marquise | G | VS1 | Excellent
From $872
Compare at $5,870
IGISave 83.7%3.49ct | Marquise | F | VS1 | Very Good
From $974
Compare at $5,990
IGISave 74.6%3.49ct | Marquise | F | VS2 | Excellent
From $994
Compare at $3,910
IGISave 86%3.49ct | Marquise | E | VS1 | Ideal
From $888
Compare at $6,340
IGISave 84.8%3.49ct | Marquise | G | VVS2 | Excellent
From $1,110
Compare at $7,300
IGI3.49ct | Marquise | E | VS1 | Very Good
From $987
Compare at $1,084
IGISave 82.7%3.49ct | Marquise | F | VS2 | Excellent
From $816
Compare at $4,710
IGISave 78.6%3.49ct | Marquise | F | VS2 | Excellent
From $1,009
Compare at $4,710
IGISave 88.7%3.49ct | Marquise | G | VVS2 | Excellent
From $738
Compare at $6,550
IGISave 87%3.49ct | Marquise | E | VS1 | Ideal
From $888
Compare at $6,840
IGISave 76.6%3.49ct | Marquise | E | VS1 | Very Good
From $1,782
Compare at $7,601
IGISave 81.5%3.49ct | Marquise | E | VVS2 | Very Good
From $1,548
Compare at $8,350
IGISave 33%3.49ct | Marquise | F | VVS2 | Ideal
From $1,333
Compare at $1,988
Entry pricing in this category starts around $680.
What to Know When Shopping for 3.5 Carat Marquise Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $13,617 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 $1,195 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 564 comparable stones in this segment. Prices start around $680 and go up to $14,297.
Based on the latest market data, the average asking price is about $1,745 with a median around $1,195.
The observed spread is roughly $13,617 across tracked listings, which is about 95.2% 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 $1,195, 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 13 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 $13,617 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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