0.4 Carat Marquise Natural Diamond Prices Comparison
As of May 2026, 0.4 carat marquise natural diamonds usually range from $216 to $1,770, with an average price of $812.In the last month, prices for these diamonds are down 2%.Compare 710 verified listings across 7 retailers tracked by CaratRadar.
0.4 Carat Marquise Natural Diamond Market Overview
CaratRadar currently tracks 710 verified 0.4-carat marquise natural diamonds listed across 7 online retailers. Prices in this segment range from $216 to $1,770, with an average asking price of $812 and a median of $791.
The price spread of $1,554 (87.8% 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 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.
710 diamonds tracked in this segment
Price range: $216 to $1,770
Average price: $812
Median price: $791
Available across 7 retailers
Savings potential: up to 87.8%
Price Range Overview
As of May 29, 2026Real market range for this carat, shape, and diamond type.
710
$216
$812
$791
$1,770
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 11.3%IGI | 0.41ct | Marquise | J | SI1 | Very Good
From $319
Compare at $360
Save 12%IGI | 0.41ct | Marquise | K | VVS2 | Very Good
From $330
Compare at $375
Save 45.4%GIA | 0.46ct | Marquise | J | SI2 | Excellent
From $344
Compare at $630
Save 46%GIA | 0.41ct | Marquise | J | SI2 | Excellent
From $363
Compare at $673
IGI | 0.47ct | Marquise | J | VS2 | Very Good
From $370
Compare at $403
Save 27.8%GIA | 0.41ct | Marquise | K | VS2 | Excellent
From $372
Compare at $515
Save 13.7%GIA | 0.47ct | Marquise | J | SI2 | Very Good
From $377
Compare at $437
GIA | 0.43ct | Marquise | E | SI2 | Ideal
From $391
Compare at $420
Save 24%IGI | 0.45ct | Marquise | J | VS1 | Very Good
From $391
Compare at $515
Save 31.2%GIA | 0.44ct | Marquise | I | VS2 | Excellent
From $393
Compare at $571
IGI | 0.43ct | Marquise | J | VVS2 | Very Good
From $395
Compare at $435
GIA | 0.48ct | Marquise | L | SI2 | Very Good
From $411
Compare at $420
Save 14.8%IGI | 0.41ct | Marquise | H | SI1 | Very Good
From $415
Compare at $487
IGI | 0.45ct | Marquise | J | SI1 | Very Good
From $420
Compare at $459
Save 14.2%GIA | 0.41ct | Marquise | J | VS1 | Excellent
From $423
Compare at $493
Save 17.9%GIA | 0.46ct | Marquise | K | VS1 | Ideal
From $427
Compare at $520
Save 19.1%GIA | 0.41ct | Marquise | I | SI2 | Excellent
From $432
Compare at $534
GIA | 0.41ct | Marquise | I | VS2 | Excellent
From $435
Compare at $459
Save 18.1%GIA | 0.43ct | Marquise | K | VS2 | Excellent
From $437
Compare at $534
Save 15.7%GIA | 0.41ct | Marquise | J | VS1 | Excellent
From $439
Compare at $521
Save 11.4%GIA | 0.41ct | Marquise | J | VVS2 | Good
From $442
Compare at $499
Save 19%GIA | 0.41ct | Marquise | E | SI1 | Excellent
From $443
Compare at $547
GIA | 0.41ct | Marquise | L | VS2 | Ideal
From $444
Compare at $457
Save 16.4%GIA | 0.43ct | Marquise | E | SI1 | Ideal
From $445
Compare at $532
Save 11.7%GIA | 0.43ct | Marquise | K | VS1 | Ideal
From $450
Compare at $510
Save 17.1%GIA | 0.48ct | Marquise | I | SI1 | Very Good
From $455
Compare at $549
Save 21.3%IGI | 0.41ct | Marquise | H | VS2 | Very Good
From $455
Compare at $578
Save 19.1%GIA | 0.49ct | Marquise | K | VS1 | Very Good
From $463
Compare at $572
Save 22.8%GIA | 0.41ct | Marquise | G | SI2 | Excellent
From $463
Compare at $600
Save 21.2%IGI | 0.41ct | Marquise | H | VS2 | Very Good
From $465
Compare at $590
Save 26.1%GIA | 0.45ct | Marquise | J | SI2 | Excellent
From $465
Compare at $630
GIA | 0.41ct | Marquise | L | VS2 | Excellent
From $468
Compare at $484
Save 23.4%GIA | 0.44ct | Marquise | E | SI1 | Excellent
From $471
Compare at $615
GIA | 0.43ct | Marquise | F | SI1 | Ideal
From $474
Compare at $505
Save 17.3%GIA | 0.43ct | Marquise | K | SI1 | Excellent
From $475
Compare at $574
Save 15.5%IGI | 0.44ct | Marquise | I | VS2 | Very Good
From $475
Compare at $562
Save 21.4%IGI | 0.41ct | Marquise | H | VS1 | Very Good
From $475
Compare at $604
Save 21.6%IGI | 0.43ct | Marquise | H | VS2 | Very Good
From $475
Compare at $606
Save 13.3%IGI | 0.45ct | Marquise | H | SI1 | Very Good
From $475
Compare at $548
Save 21.6%IGI | 0.43ct | Marquise | H | VS2 | Very Good
From $475
Compare at $606
IGI | 0.42ct | Marquise | H | VS2 | Very Good
From $475
Compare at $528
Save 13.4%GIA | 0.41ct | Marquise | G | VS1 | Ideal
From $478
Compare at $552
Save 17.4%GIA | 0.41ct | Marquise | D | SI1 | Very Good
From $479
Compare at $580
GIA | 0.41ct | Marquise | I | SI1 | Ideal
From $480
Compare at $530
Save 21.7%IGI | 0.48ct | Marquise | I | VS2 | Very Good
From $480
Compare at $613
Save 22%IGI | 0.47ct | Marquise | H | SI1 | Very Good
From $480
Compare at $615
Save 21.6%IGI | 0.42ct | Marquise | H | VS1 | Very Good
From $485
Compare at $619
GIA | 0.49ct | Marquise | J | VS1 | Ideal
From $486
Compare at $524
GIA | 0.47ct | Marquise | L | VVS1 | Excellent
From $486
Compare at $504
Save 18.2%GIA | 0.41ct | Marquise | H | VS1 | Ideal
From $487
Compare at $595
Entry pricing in this category starts around $216.
What to Know When Shopping for 0.4 Carat Marquise Natural Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $1,554 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 $791 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.
- Compare natural vs. lab-grown options for the same carat and shape. Lab-grown diamonds are chemically identical but often 30-50% less expensive.
- 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 710 comparable stones in this segment. Prices start around $216 and go up to $1,770.
Based on the latest market data, the average asking price is about $812 with a median around $791.
The observed spread is roughly $1,554 across tracked listings, which is about 87.8% 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 $812. The median price is $791, 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 7 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 $1,554 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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Tracking Natural inventory for 0.4 carat Marquise diamonds.