4 Carat Marquise Lab Grown Diamond Prices Comparison
As of July 2026, 4 carat marquise lab grown diamonds usually range from $495 to $12,590, with an average price of $2,941.In the last month, prices for these diamonds are down 2.8%.Compare 2,186 verified listings across 8 retailers tracked by CaratRadar.
4 Carat Marquise Lab Grown Diamond Market Overview
CaratRadar currently tracks 2,186 verified 4-carat marquise lab grown diamonds listed across 8 online retailers. Prices in this segment range from $495 to $12,590, with an average asking price of $2,941 and a median of $2,032.
The price spread of $12,095 (96.1% 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.
2,186 diamonds tracked in this segment
Price range: $495 to $12,590
Average price: $2,941
Median price: $2,032
Available across 8 retailers
Savings potential: up to 96.1%
Price Range Overview
As of Jul 13, 2026Real market range for this carat, shape, and diamond type.
2,186
$495
$2,941
$2,032
$12,590
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 68.5%IGI | 4.02ct | Marquise | F | SI1 | Ideal
From $555
Compare at $1,763
Save 68.9%IGI | 4.08ct | Marquise | F | SI1 | Ideal
From $563
Compare at $1,812
Save 64.7%IGI | 4.05ct | Marquise | I | VS2 | Ideal
From $566
Compare at $1,604
Save 71.8%IGI | 4.02ct | Marquise | E | SI1 | Very Good
From $574
Compare at $2,036
Save 72%IGI | 4.05ct | Marquise | E | SI1 | Ideal
From $578
Compare at $2,065
Save 65%IGI | 4.03ct | Marquise | D | SI1 | Ideal
From $600
Compare at $1,712
Save 64.4%IGI | 4.01ct | Marquise | D | SI1 | Ideal
From $604
Compare at $1,698
Save 64.6%IGI | 4.04ct | Marquise | G | VS1 | Ideal
From $683
Compare at $1,928
Save 67.8%IGI | 4ct | Marquise | E | VS1 | Very Good
From $683
Compare at $2,122
Save 64%IGI | 4.01ct | Marquise | G | VS1 | Ideal
From $685
Compare at $1,904
Save 64%IGI | 4.01ct | Marquise | G | VS1 | Excellent
From $685
Compare at $1,904
Save 64%IGI | 4.01ct | Marquise | G | VS1 | Excellent
From $685
Compare at $1,904
Save 64.6%IGI | 4.05ct | Marquise | G | VS1 | Very Good
From $685
Compare at $1,935
Save 66%IGI | 4.02ct | Marquise | G | VVS2 | Ideal
From $686
Compare at $2,020
Save 64.7%IGI | 4.06ct | Marquise | G | VS1 | Excellent
From $687
Compare at $1,944
Save 64.8%IGI | 4.07ct | Marquise | G | VS1 | Ideal
From $688
Compare at $1,952
Save 64.2%IGI | 4.04ct | Marquise | G | VS1 | Very Good
From $690
Compare at $1,928
Save 64.2%IGI | 4.04ct | Marquise | G | VS1 | Excellent
From $690
Compare at $1,930
Save 68.6%IGI | 4ct | Marquise | E | VVS2 | Very Good
From $705
Compare at $2,248
Save 72.8%IGI | 4.02ct | Marquise | E | VVS2 | Very Good
From $708
Compare at $2,606
Save 65.6%IGI | 4ct | Marquise | F | VVS2 | Very Good
From $712
Compare at $2,071
Save 76.2%IGI | 4.05ct | Marquise | E | VVS2 | Very Good
From $714
Compare at $2,994
Save 72.8%IGI | 4.05ct | Marquise | E | VVS2 | Very Good
From $714
Compare at $2,624
Save 65.3%IGI | 4.01ct | Marquise | F | VVS2 | Very Good
From $714
Compare at $2,060
Save 68.6%IGI | 4.01ct | Marquise | E | VVS2 | Very Good
From $714
Compare at $2,273
Save 72.8%IGI | 4.07ct | Marquise | E | VVS2 | Very Good
From $717
Compare at $2,636
Save 72.8%IGI | 4.08ct | Marquise | E | VVS2 | Very Good
From $719
Compare at $2,643
Save 72.8%IGI | 4.08ct | Marquise | E | VVS2 | Very Good
From $719
Compare at $2,643
Save 64.6%IGI | 4.09ct | Marquise | G | VVS2 | Very Good
From $719
Compare at $2,032
Save 64%IGI | 4.05ct | Marquise | G | VVS2 | Very Good
From $721
Compare at $2,003
Save 68.6%IGI | 4.05ct | Marquise | E | VVS2 | Excellent
From $721
Compare at $2,295
Save 68.9%IGI | 4.05ct | Marquise | E | VVS2 | Ideal
From $721
Compare at $2,316
Save 68%IGI | 4.01ct | Marquise | E | VVS2 | Excellent
From $722
Compare at $2,256
Save 61.2%IGI | 4.02ct | Marquise | G | VS1 | Excellent
From $724
Compare at $1,866
Save 68.7%IGI | 4.07ct | Marquise | E | VVS2 | Excellent
From $725
Compare at $2,316
Save 62.1%IGI | 4.08ct | Marquise | G | VS1 | Excellent
From $726
Compare at $1,917
Save 68.9%IGI | 4.09ct | Marquise | E | VVS2 | Excellent
From $728
Compare at $2,338
Save 60.6%IGI | 4.01ct | Marquise | G | VS1 | Very Good
From $732
Compare at $1,859
Save 71.1%IGI | 4.01ct | Marquise | G | VS1 | Excellent
From $735
Compare at $2,540
Save 69.5%IGI | 4.04ct | Marquise | G | VVS2 | Excellent
From $735
Compare at $2,412
Save 71.1%IGI | 4.05ct | Marquise | G | VVS2 | Excellent
From $739
Compare at $2,559
Save 71.9%IGI | 4.03ct | Marquise | E | VVS2 | Very Good
From $739
Compare at $2,632
Save 64.5%IGI | 4.03ct | Marquise | F | VVS2 | Very Good
From $740
Compare at $2,087
Save 65.3%IGI | 4ct | Marquise | E | VS1 | Excellent
From $742
Compare at $2,139
Save 15.3%IGI | 4ct | Marquise | F | VVS2 | Very Good
From $748
Compare at $883
Save 71.6%IGI | 4.01ct | Marquise | E | VS2 | Excellent
From $749
Compare at $2,638
IGI | 4.01ct | Marquise | G | VS1 | Excellent
From $751
Compare at $796
Save 72.6%IGI | 4.02ct | Marquise | G | VVS2 | Very Good
From $754
Compare at $2,750
Save 60.3%IGI | 4ct | Marquise | F | VS1 | Very Good
From $756
Compare at $1,905
Save 61.2%IGI | 4.05ct | Marquise | F | VS1 | Very Good
From $756
Compare at $1,948
Entry pricing in this category 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 $12,095 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 $2,032 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 2,186 comparable stones in this segment. Prices start around $495 and go up to $12,590.
Based on the latest market data, the average asking price is about $2,941 with a median around $2,032.
The observed spread is roughly $12,095 across tracked listings, which is about 96.1% 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 $2,941. The median price is $2,032, 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 8 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 $12,095 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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