4 Carat Marquise Lab Grown Diamond Prices Comparison
A 4 carat marquise lab grown diamond typically costs $1,903 (median of 3,574 listings at 16 online stores), with most between $1,015 and $8,820. Average prices fell 0.3% over the last month. Updated .
Average $2,774. Listings run from $495 to $22,277 in the 4.00–4.49 carat range.
See the live listings4 Carat Marquise Lab Grown Diamond Market Overview
CaratRadar currently tracks 3,574 verified 4-carat marquise lab grown diamonds in the 4.00–4.49 carat benchmark range, listed across 16 online retailers. Prices in this segment range from $495 to $22,277, with an average asking price of $2,774 and a median of $1,903.
Across this category, asking prices span $21,782 (97.8% from the most expensive to the cheapest listing). The same certified diamond can also be listed at different prices by different retailers, which is why CaratRadar compares stones by certificate number.
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.
3,574 diamonds tracked in the 4.00–4.49 carat benchmark
Price range: $495 to $22,277
Average price: $2,774
Median price: $1,903
Available across 16 retailers
Category price spread: 97.8%
Price Range Overview
As of Oct 22, 2026Real market range for this carat, shape, and diamond type.
3,574
$495
$2,774
$1,903
$22,277
Price History
Price Comparison Matrix
Compare nearby
Prices for the next carat weights, other shapes and the natural twin.
Nearby carat weights
Other shapes at 4 carat
- 4 carat round lab grown diamond pricesAverage $3,011
- 4 carat princess lab grown diamond pricesAverage $2,776
- 4 carat cushion lab grown diamond pricesAverage $3,309
- 4 carat oval lab grown diamond pricesAverage $2,963
- 4 carat emerald lab grown diamond pricesAverage $2,937
- 4 carat pear lab grown diamond pricesAverage $2,732
- 4 carat radiant lab grown diamond pricesAverage $2,908
- 4 carat asscher lab grown diamond pricesAverage $3,337
- 4 carat heart lab grown diamond pricesAverage $2,995
Same size, natural
Live Listings
See all listingsCompare current retailer offers in the same benchmark range and open any listing for full details.
Save 72.9%IGI | 4.03ct | Marquise | G | VS1 | Excellent
From $578
Compare at $2,134
Save 72.2%IGI | 4.08ct | Marquise | G | VS1 | Very Good
From $585
Compare at $2,102
Save 73.3%IGI | 4.09ct | Marquise | G | VVS2 | Excellent
From $586
Compare at $2,192
Save 72.6%IGI | 4.02ct | Marquise | G | VS1 | Ideal
From $607
Compare at $2,213
Save 46.9%IGI | 4.07ct | Marquise | G | VVS2 | Excellent
From $657
Compare at $1,237
Save 50.8%IGI | 4ct | Marquise | G | VS1 | Very Good
From $666
Compare at $1,353
Save 68.9%IGI | 4ct | Marquise | F | VS2 | Ideal
From $679
Compare at $2,185
Save 68.9%IGI | 4.03ct | Marquise | F | VS1 | Ideal
From $680
Compare at $2,190
Save 50.5%IGI | 4.01ct | Marquise | G | VS1 | Very Good
From $682
Compare at $1,379
Save 69%IGI | 4.07ct | Marquise | G | VS1 | Excellent
From $682
Compare at $2,197
Save 58.6%IGI | 4.01ct | Marquise | F | VVS2 | Excellent
From $684
Compare at $1,654
Save 56.4%IGI | 4ct | Marquise | E | VS2 | Excellent
From $690
Compare at $1,583
Save 58.4%IGI | 4.03ct | Marquise | F | VVS2 | Excellent
From $695
Compare at $1,671
Save 70.3%IGI | 4.03ct | Marquise | F | VVS2 | Very Good
From $695
Compare at $2,338
Save 68.9%IGI | 4.02ct | Marquise | F | VS1 | Very Good
From $697
Compare at $2,243
Save 68.9%IGI | 4.02ct | Marquise | F | VS1 | Very Good
From $697
Compare at $2,243
Save 69.8%IGI | 4ct | Marquise | F | VVS2 | Ideal
From $698
Compare at $2,309
Save 78.1%IGI | 4.04ct | Marquise | F | VVS2 | Very Good
From $705
Compare at $3,220
Save 53.6%IGI | 4.01ct | Marquise | F | VS2 | Ideal
From $705
Compare at $1,519
Save 52.2%IGI | 4.04ct | Marquise | G | VVS2 | Very Good
From $711
Compare at $1,488
Save 79.7%IGI | 4.02ct | Marquise | G | VS1 | Very Good
From $716
Compare at $3,520
Save 79.9%IGI | 4.08ct | Marquise | G | VS1 | Excellent
From $717
Compare at $3,570
Save 34.3%IGI | 4.03ct | Marquise | G | VVS2 | Very Good
From $717
Compare at $1,092
Save 68.9%IGI | 4.05ct | Marquise | F | VVS2 | Very Good
From $717
Compare at $2,308
Save 56.9%IGI | 4.02ct | Marquise | F | VVS2 | Excellent
From $720
Compare at $1,671
Save 57.1%IGI | 4.04ct | Marquise | F | VVS2 | Excellent
From $723
Compare at $1,687
Save 57.1%IGI | 4.04ct | Marquise | F | VVS2 | Excellent
From $723
Compare at $1,687
Save 68.7%IGI | 4.06ct | Marquise | F | VVS2 | Very Good
From $725
Compare at $2,315
Save 79.7%IGI | 4.08ct | Marquise | G | VS1 | Very Good
From $726
Compare at $3,570
Save 57.3%IGI | 4.06ct | Marquise | F | VVS2 | Excellent
From $727
Compare at $1,702
Save 57.4%IGI | 4.07ct | Marquise | F | VVS2 | Excellent
From $728
Compare at $1,710
Save 57.4%IGI | 4.07ct | Marquise | F | VVS2 | Excellent
From $728
Compare at $1,710
Save 71%IGI | 4.02ct | Marquise | F | VS1 | Very Good
From $729
Compare at $2,512
Save 79.6%IGI | 4.09ct | Marquise | G | VS1 | Very Good
From $730
Compare at $3,580
Save 54.5%IGI | 4.08ct | Marquise | F | VS1 | Excellent
From $730
Compare at $1,606
Save 69%IGI | 4.09ct | Marquise | F | VVS2 | Very Good
From $731
Compare at $2,359
Save 70.9%IGI | 4.04ct | Marquise | F | VS1 | Very Good
From $733
Compare at $2,523
Save 78.9%IGI | 4ct | Marquise | F | VS1 | Ideal
From $736
Compare at $3,483
Save 61.1%IGI | 4.01ct | Marquise | E | VS2 | Excellent
From $737
Compare at $1,893
Save 79.2%IGI | 4.06ct | Marquise | G | VS1 | Very Good
From $742
Compare at $3,560
Save 78.1%IGI | 4.08ct | Marquise | F | VVS2 | Very Good
From $742
Compare at $3,394
Save 78.1%IGI | 4.08ct | Marquise | F | VVS2 | Very Good
From $742
Compare at $3,394
Save 70.7%IGI | 4.2ct | Marquise | F | VS1 | Very Good
From $743
Compare at $2,533
Save 54.6%IGI | 4.05ct | Marquise | F | VS1 | Very Good
From $744
Compare at $1,637
Save 78.2%IGI | 4.1ct | Marquise | F | VVS2 | Very Good
From $745
Compare at $3,410
Save 78.2%IGI | 4.1ct | Marquise | F | VVS2 | Very Good
From $745
Compare at $3,410
Save 78.2%IGI | 4.1ct | Marquise | F | VVS2 | Very Good
From $745
Compare at $3,410
Save 53.3%IGI | 4.01ct | Marquise | FANCY | VS2 | Very Good
From $746
Compare at $1,597
Save 49.2%IGI | 4ct | Marquise | F | VS2 | Very Good
From $747
Compare at $1,470
Save 49.3%IGI | 4.01ct | Marquise | F | VS2 | Very Good
From $749
Compare at $1,477
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, because the same certificate can be listed at different prices by different stores. Across this whole category, asking prices span $21,782 from the cheapest to the most expensive listing.
- 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 $1,903 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 3,574 comparable stones in the 4.00–4.49 carat benchmark range. Prices start around $495 and go up to $22,277.
Based on the latest market data, the average asking price is about $2,774 with a median around $1,903.
The observed spread is roughly $21,782 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 $2,774. The median price is $1,903, 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 16 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. Across this category, asking prices span $21,782 from the cheapest to the most expensive listing, and the same certified diamond can also carry different prices at different 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.
Tools and Guides
Tracking Lab Grown inventory for the 4.00–4.49 carat Marquise diamond benchmark.