0.4 Carat Cushion Natural Diamond Prices Comparison
As of May 2026, 0.4 carat cushion natural diamonds usually range from $328 to $17,838, with an average price of $973.In the last month, prices for these diamonds are down 3%.Compare 200 verified listings across 7 retailers tracked by CaratRadar.
0.4 Carat Cushion Natural Diamond Market Overview
CaratRadar currently tracks 200 verified 0.4-carat cushion natural diamonds listed across 7 online retailers. Prices in this segment range from $328 to $17,838, with an average asking price of $973 and a median of $840.
The price spread of $17,510 (98.2% 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.
200 diamonds tracked in this segment
Price range: $328 to $17,838
Average price: $973
Median price: $840
Available across 7 retailers
Savings potential: up to 98.2%
Price Range Overview
As of May 29, 2026Real market range for this carat, shape, and diamond type.
200
$328
$973
$840
$17,838
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 29%GIA | 0.42ct | Cushion | J | VS2 | Excellent
From $343
Compare at $483
Save 17%GIA | 0.41ct | Cushion | K | VS1 | Excellent
From $367
Compare at $442
GIA | 0.43ct | Cushion | K | VVS1 | Excellent
From $383
Compare at $395
Save 18.4%GIA | 0.41ct | Cushion | K | VS1 | Excellent
From $420
Compare at $515
Save 17.9%GIA | 0.45ct | Cushion | K | VS1 | Excellent
From $421
Compare at $513
Save 17.9%GIA | 0.42ct | Cushion | J | VS2 | Excellent
From $424
Compare at $517
IGI | 0.41ct | Cushion | K | SI1 | Very Good
From $436
Compare at $440
Save 29.1%GIA | 0.42ct | Cushion | G | VS1 | Ideal
From $440
Compare at $621
Save 16%GIA | 0.41ct | Cushion | J | VS1 | Excellent
From $450
Compare at $536
GIA | 0.47ct | Cushion | J | VVS2 | Excellent
From $450
Compare at $474
Save 21.4%GIA | 0.46ct | Cushion | F | SI1 | Excellent
From $457
Compare at $582
Save 37.8%GIA | 0.44ct | Cushion | I | SI2 | Very Good
From $457
Compare at $735
Save 16.8%GIA | 0.41ct | Cushion | J | VS1 | Excellent
From $462
Compare at $555
GIA | 0.43ct | Cushion | K | VVS1 | Excellent
From $465
Compare at $494
GIA | 0.43ct | Cushion | J | VVS1 | Excellent
From $465
Compare at $481
GIA | 0.45ct | Cushion | F | SI2 | Good
From $467
Compare at $499
Save 30.3%GIA | 0.41ct | Cushion | D | VS2 | Excellent
From $470
Compare at $674
Save 16.6%GIA | 0.42ct | Cushion | J | VS1 | Excellent
From $470
Compare at $564
Save 16.4%GIA | 0.43ct | Cushion | I | SI2 | Excellent
From $475
Compare at $568
Save 13.7%GIA | 0.41ct | Cushion | G | SI1 | Ideal
From $477
Compare at $553
Save 21.7%GIA | 0.45ct | Cushion | J | VS1 | Excellent
From $477
Compare at $609
Save 19.2%GIA | 0.44ct | Cushion | G | SI1 | Ideal
From $477
Compare at $590
GIA | 0.43ct | Cushion | K | VS1 | Excellent
From $480
Compare at $532
IGI | 0.44ct | Cushion | K | VS1 | Very Good
From $481
Compare at $486
Save 17.1%GIA | 0.41ct | Cushion | I | VS2 | Excellent
From $485
Compare at $585
Save 15.9%GIA | 0.41ct | Cushion | J | VS1 | Excellent
From $496
Compare at $590
Save 14.8%GIA | 0.41ct | Cushion | I | VS1 | Ideal
From $497
Compare at $583
Save 11.3%GIA | 0.48ct | Cushion | H | SI2 | Good
From $497
Compare at $560
Save 29.4%GIA | 0.46ct | Cushion | H | VVS1 | Ideal
From $500
Compare at $708
Save 22.5%IGI | 0.47ct | Cushion | H | VS1 | Very Good
From $500
Compare at $645
Save 15.8%GIA | 0.46ct | Cushion | J | VS2 | Excellent
From $502
Compare at $596
Save 12.6%GIA | 0.45ct | Cushion | E | SI1 | Excellent
From $507
Compare at $580
Save 31.1%GIA | 0.45ct | Cushion | H | VS1 | Excellent
From $507
Compare at $736
Save 16.1%GIA | 0.46ct | Cushion | J | VS1 | Excellent
From $508
Compare at $606
Save 16.4%GIA | 0.48ct | Cushion | K | VVS1 | Excellent
From $509
Compare at $609
Save 10.9%GIA | 0.47ct | Cushion | I | SI2 | Excellent
From $512
Compare at $575
Save 38%GIA | 0.45ct | Cushion | K | VS1 | Excellent
From $513
Compare at $828
Save 16.5%GIA | 0.41ct | Cushion | I | VS1 | Excellent
From $516
Compare at $618
Save 16.5%GIA | 0.45ct | Cushion | J | VVS2 | Excellent
From $516
Compare at $618
GIA | 0.44ct | Cushion | H | SI1 | Excellent
From $517
Compare at $570
IGI | 0.43ct | Cushion | K | VVS1 | Very Good
From $517
Compare at $524
Save 16.4%GIA | 0.41ct | Cushion | E | VS2 | Excellent
From $521
Compare at $623
IGI | 0.46ct | Cushion | K | VVS1 | Very Good
From $524
Compare at $575
Save 18.2%GIA | 0.45ct | Cushion | I | VS2 | Excellent
From $525
Compare at $641
Save 14.8%GIA | 0.41ct | Cushion | E | SI1 | Good
From $527
Compare at $618
Save 16.1%GIA | 0.41ct | Cushion | I | VS1 | Excellent
From $527
Compare at $628
Save 18.4%GIA | 0.42ct | Cushion | I | VS1 | Excellent
From $536
Compare at $657
Save 17%GIA | 0.41ct | Cushion | H | VS1 | Excellent
From $539
Compare at $649
Save 16.4%GIA | 0.41ct | Cushion | E | SI1 | Good
From $546
Compare at $653
Save 16.4%GIA | 0.41ct | Cushion | E | SI1 | Ideal
From $546
Compare at $653
Entry pricing in this category starts around $328.
What to Know When Shopping for 0.4 Carat Cushion Natural Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $17,510 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 $840 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.
- Cushion cuts come in standard and modified brilliant varieties. Modified brilliants tend to show more fire, while standard cushions have broader facets.
Frequently Asked Questions
We currently track 200 comparable stones in this segment. Prices start around $328 and go up to $17,838.
Based on the latest market data, the average asking price is about $973 with a median around $840.
The observed spread is roughly $17,510 across tracked listings, which is about 98.2% 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 $973. The median price is $840, 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 $17,510 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 Cushion diamonds.