3.5 Carat Marquise Lab Grown Diamond Prices Comparison
As of May 2026, 3.5 carat marquise lab grown diamonds usually range from $516 to $15,387, with an average price of $2,904.In the last month, prices for these diamonds are down 7.4%.Compare 456 verified listings across 9 retailers tracked by CaratRadar.
3.5 Carat Marquise Lab Grown Diamond Market Overview
CaratRadar currently tracks 456 verified 3.5-carat marquise lab grown diamonds listed across 9 online retailers. Prices in this segment range from $516 to $15,387, with an average asking price of $2,904 and a median of $2,036.
The price spread of $14,871 (96.6% 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.
456 diamonds tracked in this segment
Price range: $516 to $15,387
Average price: $2,904
Median price: $2,036
Available across 9 retailers
Savings potential: up to 96.6%
Price Range Overview
As of May 31, 2026Real market range for this carat, shape, and diamond type.
456
$516
$2,904
$2,036
$15,387
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 21.1%IGI | 3.58ct | Marquise | H | VS1 | Excellent
From $520
Compare at $659
Save 31.6%IGI | 3.55ct | Marquise | G | VVS2 | Ideal
From $540
Compare at $789
Save 23.8%IGI | 3.53ct | Marquise | G | VVS2 | Ideal
From $545
Compare at $715
Save 56%IGI | 3.52ct | Marquise | G | VS1 | Excellent
From $550
Compare at $1,251
Save 56%IGI | 3.52ct | Marquise | G | VS1 | Excellent
From $550
Compare at $1,251
Save 22.1%IGI | 3.53ct | Marquise | G | VS1 | Excellent
From $553
Compare at $710
Save 56.3%IGI | 3.55ct | Marquise | G | VS1 | Excellent
From $555
Compare at $1,271
Save 22%IGI | 3.59ct | Marquise | G | VS1 | Excellent
From $563
Compare at $722
Save 55.9%IGI | 3.56ct | Marquise | G | VS1 | Excellent
From $564
Compare at $1,279
Save 23.8%IGI | 3.58ct | Marquise | G | VS1 | Excellent
From $567
Compare at $744
Save 23.8%IGI | 3.5ct | Marquise | G | VVS2 | Excellent
From $568
Compare at $745
Save 23.8%IGI | 3.5ct | Marquise | G | VVS2 | Excellent
From $568
Compare at $745
Save 58.1%IGI | 3.52ct | Marquise | G | VVS2 | Excellent
From $572
Compare at $1,365
Save 58.4%IGI | 3.55ct | Marquise | G | VVS2 | Excellent
From $577
Compare at $1,388
Save 58.7%IGI | 3.57ct | Marquise | G | VVS2 | Excellent
From $580
Compare at $1,403
Save 62.1%IGI | 3.56ct | Marquise | H | VS2 | Excellent
From $626
Compare at $1,653
Save 59.9%IGI | 3.57ct | Marquise | H | VS1 | Excellent
From $637
Compare at $1,590
IGI | 3.57ct | Marquise | G | VS1 | Ideal
From $676
Compare at $677
Save 61.1%IGI | 3.5ct | Marquise | G | VVS2 | Ideal
From $678
Compare at $1,744
IGI | 3.53ct | Marquise | G | VVS2 | Excellent
From $688
Compare at $690
IGI | 3.54ct | Marquise | F | VVS2 | Very Good
From $697
Compare at $1,019
Save 67.6%IGI | 3.51ct | Marquise | G | VS1 | Excellent
From $699
Compare at $2,157
Save 44.2%IGI | 3.54ct | Marquise | G | VS2 | Excellent
From $699
Compare at $1,253
Save 30.3%IGI | 3.53ct | Marquise | F | VS1 | Excellent
From $709
Compare at $1,017
Save 29.5%IGI | 3.54ct | Marquise | E | VS2 | Excellent
From $711
Compare at $1,009
Save 29.5%IGI | 3.51ct | Marquise | E | VS2 | Excellent
From $713
Compare at $1,011
Save 60.1%IGI | 3.52ct | Marquise | F | VS1 | Ideal
From $715
Compare at $1,794
Save 59.5%IGI | 3.52ct | Marquise | F | VS1 | Very Good
From $718
Compare at $1,772
Save 73.3%IGI | 3.54ct | Marquise | F | VS1 | Excellent
From $719
Compare at $2,690
Save 29.5%IGI | 3.55ct | Marquise | E | VS2 | Ideal
From $721
Compare at $1,023
Save 62.4%IGI | 3.51ct | Marquise | F | VVS2 | Very Good
From $721
Compare at $1,919
IGI | 3.59ct | Marquise | F | VS1 | Excellent
From $722
Compare at $792
Save 43.5%IGI | 3.58ct | Marquise | G | VS2 | Ideal
From $725
Compare at $1,283
Save 74%IGI | 3.54ct | Marquise | F | VS1 | Excellent
From $726
Compare at $2,795
Save 48.8%IGI | 3.54ct | Marquise | F | VS1 | Excellent
From $726
Compare at $1,419
Save 62.7%IGI | 3.54ct | Marquise | F | VVS2 | Very Good
From $727
Compare at $1,950
Save 71.8%IGI | 3.51ct | Marquise | E | VS2 | Excellent
From $728
Compare at $2,583
IGI | 3.51ct | Marquise | G | VS1 | Excellent
From $729
Compare at $1,245
IGI | 3.56ct | Marquise | F | VS1 | Excellent
From $730
Compare at $802
Save 71.8%IGI | 3.54ct | Marquise | E | VS2 | Excellent
From $734
Compare at $2,605
Save 49.4%IGI | 3.58ct | Marquise | F | VS1 | Excellent
From $734
Compare at $1,450
Save 11.9%IGI | 3.59ct | Marquise | G | VVS2 | Excellent
From $739
Compare at $839
Save 50.4%IGI | 3.5ct | Marquise | F | VVS2 | Ideal
From $740
Compare at $1,491
Save 50.5%IGI | 3.51ct | Marquise | F | VVS2 | Ideal
From $740
Compare at $1,495
Save 79.5%IGI | 3.55ct | Marquise | F | VVS2 | Ideal
From $742
Compare at $3,620
Save 79.5%IGI | 3.56ct | Marquise | F | VVS2 | Excellent
From $744
Compare at $3,630
Save 53.7%IGI | 3.51ct | Marquise | G | VS1 | Excellent
From $750
Compare at $1,620
Save 70.6%IGI | 3.51ct | Marquise | G | VVS2 | Very Good
From $752
Compare at $2,555
IGI | 3.57ct | Marquise | F | VVS2 | Ideal
From $754
Compare at $798
Save 67.1%IGI | 3.52ct | Marquise | F | VS2 | Very Good
From $755
Compare at $2,292
Entry pricing in this category starts around $516.
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 $14,871 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 $2,036 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 456 comparable stones in this segment. Prices start around $516 and go up to $15,387.
Based on the latest market data, the average asking price is about $2,904 with a median around $2,036.
The observed spread is roughly $14,871 across tracked listings, which is about 96.6% 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 $2,904. The median price is $2,036, 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 9 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 $14,871 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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