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 $15,488, with an average price of $2,896.In the last month, prices for these diamonds are down 7%.Compare 505 verified listings across 10 retailers tracked by CaratRadar.
3.5 Carat Marquise Lab Grown Diamond Market Overview
CaratRadar currently tracks 505 verified 3.5-carat marquise lab grown diamonds listed across 10 online retailers. Prices in this segment range from $516 to $15,488, with an average asking price of $2,896 and a median of $2,038.
The price spread of $14,972 (96.7% 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.
505 diamonds tracked in this segment
Price range: $516 to $15,488
Average price: $2,896
Median price: $2,038
Available across 10 retailers
Savings potential: up to 96.7%
Price Range Overview
As of May 29, 2026Real market range for this carat, shape, and diamond type.
505
$516
$2,896
$2,038
$15,488
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 21.2%IGI | 3.58ct | Marquise | H | VS1 | Excellent
From $520
Compare at $660
Save 31.6%IGI | 3.55ct | Marquise | G | VVS2 | Ideal
From $540
Compare at $789
Save 22%IGI | 3.5ct | Marquise | G | VS1 | Very Good
From $549
Compare at $704
Save 22.1%IGI | 3.53ct | Marquise | G | VS1 | Excellent
From $553
Compare at $710
Save 22.1%IGI | 3.53ct | Marquise | G | VS1 | Excellent
From $553
Compare at $710
Save 22%IGI | 3.55ct | Marquise | G | VS1 | Excellent
From $557
Compare at $714
Save 22.1%IGI | 3.56ct | Marquise | G | VS1 | Excellent
From $558
Compare at $716
Save 20.9%IGI | 3.52ct | Marquise | G | VS1 | Very Good
From $560
Compare at $708
Save 22%IGI | 3.59ct | Marquise | G | VS1 | Excellent
From $563
Compare at $722
Save 23.3%IGI | 3.55ct | Marquise | G | VVS2 | Excellent
From $563
Compare at $734
Save 22.1%IGI | 3.5ct | Marquise | G | VVS2 | Excellent
From $564
Compare at $724
Save 20.9%IGI | 3.56ct | Marquise | G | VS1 | Excellent
From $566
Compare at $716
Save 23.3%IGI | 3.52ct | Marquise | G | VVS2 | Excellent
From $566
Compare at $738
Save 22.2%IGI | 3.58ct | Marquise | G | VS1 | Excellent
From $568
Compare at $730
Save 22.2%IGI | 3.58ct | Marquise | G | VS1 | Excellent
From $568
Compare at $730
Save 23.3%IGI | 3.5ct | Marquise | G | VVS2 | Excellent
From $571
Compare at $744
Save 23.4%IGI | 3.55ct | Marquise | G | VVS2 | Excellent
From $571
Compare at $745
Save 23.3%IGI | 3.57ct | Marquise | G | VVS2 | Excellent
From $574
Compare at $748
Save 64.6%IGI | 3.5ct | Marquise | D | SI1 | Very Good
From $627
Compare at $1,771
Save 63.8%IGI | 3.5ct | Marquise | F | VS1 | Very Good
From $643
Compare at $1,774
Save 63.9%IGI | 3.52ct | Marquise | F | VS1 | Excellent
From $645
Compare at $1,789
Save 63.7%IGI | 3.53ct | Marquise | F | VS1 | Excellent
From $654
Compare at $1,801
IGI | 3.57ct | Marquise | G | VS1 | Ideal
From $676
Compare at $680
Save 61.1%IGI | 3.5ct | Marquise | G | VVS2 | Ideal
From $678
Compare at $1,744
Save 61%IGI | 3.5ct | Marquise | F | VS1 | Very Good
From $686
Compare at $1,761
Save 60.8%IGI | 3.51ct | Marquise | E | VS2 | Excellent
From $695
Compare at $1,773
IGI | 3.54ct | Marquise | F | VVS2 | Very Good
From $697
Compare at $1,019
IGI | 3.53ct | Marquise | G | VVS2 | Ideal
From $697
Compare at $700
Save 67%IGI | 3.51ct | Marquise | G | VS1 | Excellent
From $699
Compare at $2,119
Save 55.5%IGI | 3.57ct | Marquise | H | VS1 | Excellent
From $707
Compare at $1,590
Save 30.3%IGI | 3.53ct | Marquise | F | VS1 | Excellent
From $709
Compare at $1,017
Save 48.3%IGI | 3.5ct | Marquise | G | VVS2 | Very Good
From $710
Compare at $1,374
Save 17.4%IGI | 3.53ct | Marquise | G | VVS2 | Excellent
From $710
Compare at $860
Save 73.6%IGI | 3.54ct | Marquise | F | VS1 | Excellent
From $711
Compare at $2,690
Save 60.4%IGI | 3.55ct | Marquise | G | VVS2 | Very Good
From $713
Compare at $1,801
Save 29.5%IGI | 3.51ct | Marquise | E | VS2 | Excellent
From $713
Compare at $1,011
IGI | 3.54ct | Marquise | G | VVS2 | Excellent
From $718
Compare at $722
Save 59.5%IGI | 3.52ct | Marquise | F | VS1 | Very Good
From $718
Compare at $1,772
Save 71.9%IGI | 3.54ct | Marquise | E | VS2 | Excellent
From $719
Compare at $2,558
Save 74.2%IGI | 3.54ct | Marquise | F | VS1 | Excellent
From $720
Compare at $2,795
Save 22.1%IGI | 3.54ct | Marquise | F | VS1 | Excellent
From $720
Compare at $924
Save 59.6%IGI | 3.51ct | Marquise | F | VS1 | Ideal
From $721
Compare at $1,783
Save 62.4%IGI | 3.51ct | Marquise | F | VVS2 | Very Good
From $721
Compare at $1,919
Save 63.5%IGI | 3.55ct | Marquise | F | VVS2 | Excellent
From $721
Compare at $1,973
Save 62.7%IGI | 3.51ct | Marquise | F | VVS2 | Excellent
From $721
Compare at $1,934
IGI | 3.59ct | Marquise | F | VS1 | Excellent
From $722
Compare at $792
Save 22.2%IGI | 3.58ct | Marquise | F | VS1 | Excellent
From $727
Compare at $934
Save 62.7%IGI | 3.54ct | Marquise | F | VVS2 | Very Good
From $727
Compare at $1,950
Save 57.3%IGI | 3.5ct | Marquise | G | VVS2 | Excellent
From $734
Compare at $1,720
Save 79.6%IGI | 3.55ct | Marquise | F | VVS2 | Ideal
From $737
Compare at $3,620
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 $14,972 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 $2,038 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 505 comparable stones in this segment. Prices start around $516 and go up to $15,488.
Based on the latest market data, the average asking price is about $2,896 with a median around $2,038.
The observed spread is roughly $14,972 across tracked listings, which is about 96.7% 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 $2,896. The median price is $2,038, 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 10 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 $14,972 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.
Related Price Categories
Explore adjacent carat ranges and shapes to compare market shifts.
3.4 Carat Marquise Lab Grown Diamond Prices
3.6 Carat Marquise Lab Grown Diamond Prices
3.3 Carat Marquise Lab Grown Diamond Prices
3.7 Carat Marquise Lab Grown Diamond Prices
3.2 Carat Marquise Lab Grown Diamond Prices
3.8 Carat Marquise Lab Grown Diamond Prices
3.1 Carat Marquise Lab Grown Diamond Prices
3.5 Carat Round Lab Grown Diamond Prices
3.5 Carat Oval Lab Grown Diamond Prices
3.5 Carat Radiant Lab Grown Diamond Prices
3.5 Carat Cushion Lab Grown Diamond Prices
3.5 Carat Emerald Lab Grown Diamond Prices
Tracking Lab Grown inventory for 3.5 carat Marquise diamonds.