4 Carat Marquise Lab Grown Diamond Prices Comparison
As of October 2026, 4 carat marquise lab grown diamonds in the 4.00–4.49 carat benchmark range usually range from $495 to $22,897, with an average price of $2,789.In the last month, prices for these diamonds are down 1.2%.Compare 3,055 verified listings across 14 retailers tracked by CaratRadar.
4 Carat Marquise Lab Grown Diamond Market Overview
CaratRadar currently tracks 3,055 verified 4-carat marquise lab grown diamonds in the 4.00–4.49 carat benchmark range, listed across 14 online retailers. Prices in this segment range from $495 to $22,896, with an average asking price of $2,789 and a median of $1,907.
The price spread of $22,402 (97.8% 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 use the same benchmark range throughout the page and 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.
3,055 diamonds tracked in the 4.00–4.49 carat benchmark
Price range: $495 to $22,896
Average price: $2,789
Median price: $1,907
Available across 14 retailers
Savings potential: up to 97.8%
Price Range Overview
As of Oct 13, 2026Real market range for this carat, shape, and diamond type.
3,055
$495
$2,789
$1,907
$22,897
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers in the same benchmark range and open any listing for full details.
IGI | 4.07ct | Marquise | FANCY | SI1 | Very Good
From $606
Compare at $1,207
Save 78.5%IGI | 4.01ct | Marquise | E | VS2 | Ideal
From $683
Compare at $3,183
Save 70.1%IGI | 4ct | Marquise | F | VS1 | Excellent
From $683
Compare at $2,282
Save 59.2%IGI | 4.01ct | Marquise | F | VVS2 | Excellent
From $684
Compare at $1,675
Save 59.2%IGI | 4.02ct | Marquise | F | VVS2 | Excellent
From $686
Compare at $1,683
Save 68.9%IGI | 4.01ct | Marquise | F | VS2 | Excellent
From $688
Compare at $2,214
Save 59.4%IGI | 4.04ct | Marquise | F | VVS2 | Excellent
From $689
Compare at $1,698
Save 59.4%IGI | 4.04ct | Marquise | F | VVS2 | Excellent
From $689
Compare at $1,698
Save 54.2%IGI | 4.03ct | Marquise | G | VVS2 | Excellent
From $691
Compare at $1,508
Save 59.6%IGI | 4.06ct | Marquise | F | VVS2 | Excellent
From $693
Compare at $1,714
Save 59.7%IGI | 4.07ct | Marquise | F | VVS2 | Excellent
From $694
Compare at $1,721
Save 59.7%IGI | 4.07ct | Marquise | F | VVS2 | Excellent
From $694
Compare at $1,721
Save 58.4%IGI | 4.03ct | Marquise | F | VVS2 | Very Good
From $695
Compare at $1,669
Save 58.9%IGI | 4.03ct | Marquise | F | VVS2 | Very Good
From $695
Compare at $1,693
Save 57%IGI | 4.08ct | Marquise | F | VS1 | Excellent
From $696
Compare at $1,617
Save 51.4%IGI | 4.07ct | Marquise | G | VS1 | Ideal
From $697
Compare at $1,433
Save 68.2%IGI | 4.05ct | Marquise | F | VVS2 | Very Good
From $699
Compare at $2,196
Save 49.2%IGI | 4.03ct | Marquise | G | VS1 | Very Good
From $700
Compare at $1,378
Save 46.6%IGI | 4.09ct | Marquise | E | VS2 | Very Good
From $701
Compare at $1,312
Save 71.3%IGI | 4ct | Marquise | F | VVS2 | Very Good
From $701
Compare at $2,443
Save 58.5%IGI | 4.03ct | Marquise | F | VVS2 | Excellent
From $703
Compare at $1,695
Save 55.5%IGI | 4.06ct | Marquise | F | VS1 | Very Good
From $706
Compare at $1,588
Save 69.8%IGI | 4.02ct | Marquise | F | VVS2 | Excellent
From $708
Compare at $2,344
Save 69.8%IGI | 4.02ct | Marquise | F | VVS2 | Very Good
From $708
Compare at $2,344
Save 53%IGI | 4ct | Marquise | F | VS2 | Very Good
From $711
Compare at $1,514
Save 79.7%IGI | 4.02ct | Marquise | G | VS1 | Very Good
From $716
Compare at $3,520
Save 54.3%IGI | 4.01ct | Marquise | F | VS1 | Excellent
From $721
Compare at $1,578
Save 77.3%IGI | 4ct | Marquise | E | VS2 | Very Good
From $723
Compare at $3,188
Save 76.8%IGI | 4.09ct | Marquise | G | VVS2 | Excellent
From $725
Compare at $3,119
Save 66.7%IGI | 4.02ct | Marquise | G | VS2 | Ideal
From $725
Compare at $2,180
Save 68.9%IGI | 4.08ct | Marquise | G | VS1 | Very Good
From $726
Compare at $2,338
Save 71.8%IGI | 4.05ct | Marquise | F | VS1 | Excellent
From $727
Compare at $2,579
Save 71.8%IGI | 4.05ct | Marquise | F | VS1 | Ideal
From $727
Compare at $2,579
Save 54.6%IGI | 4.04ct | Marquise | F | VS1 | Very Good
From $727
Compare at $1,600
Save 78.9%IGI | 4.06ct | Marquise | F | VS1 | Ideal
From $729
Compare at $3,447
Save 78.9%IGI | 4.06ct | Marquise | F | VS1 | Very Good
From $729
Compare at $3,447
Save 78.1%IGI | 4.06ct | Marquise | F | VS1 | Very Good
From $731
Compare at $3,342
Save 70.7%IGI | 4.25ct | Marquise | F | VS1 | Very Good
From $732
Compare at $2,497
Save 78.8%IGI | 4.08ct | Marquise | F | VS1 | Ideal
From $733
Compare at $3,464
Save 67.1%IGI | 4ct | Marquise | G | VVS2 | Ideal
From $735
Compare at $2,231
Save 71.8%IGI | 4.01ct | Marquise | F | VVS2 | Excellent
From $735
Compare at $2,606
Save 70.7%IGI | 4.03ct | Marquise | G | VS1 | Very Good
From $738
Compare at $2,517
Save 71.8%IGI | 4.03ct | Marquise | F | VVS2 | Ideal
From $738
Compare at $2,619
Save 71.8%IGI | 4.03ct | Marquise | F | VVS2 | Ideal
From $738
Compare at $2,619
Save 78.9%IGI | 4.04ct | Marquise | F | VVS2 | Excellent
From $740
Compare at $3,500
Save 46.4%IGI | 4.01ct | Marquise | G | VS1 | Ideal
From $740
Compare at $1,381
Save 69.4%IGI | 4.02ct | Marquise | I | VS1 | Excellent
From $742
Compare at $2,428
Save 79.6%IGI | 4.08ct | Marquise | F | VVS2 | Very Good
From $742
Compare at $3,641
Save 78.2%IGI | 4ct | Marquise | F | VS1 | Ideal
From $742
Compare at $3,396
Save 78.9%IGI | 4.06ct | Marquise | F | VVS2 | Ideal
From $743
Compare at $3,518
Entry pricing in this benchmark range starts around $495.
What to Know When Shopping for 4 Carat Marquise Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $22,402 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 $1,907 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 3,055 comparable stones in the 4.00–4.49 carat benchmark range. Prices start around $495 and go up to $22,896.
Based on the latest market data, the average asking price is about $2,789 with a median around $1,907.
The observed spread is roughly $22,402 across tracked listings, which is about 97.8% from highest to lowest offer in the 4.00–4.49 carat benchmark range.
We refresh pricing data daily so these pages stay current with market changes.
Based on completed market data, the fair market benchmark is $2,789. The median price is $1,907, 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 14 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 $22,402 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.
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Tracking Lab Grown inventory for the 4.00–4.49 carat Marquise diamond benchmark.