0.4 Carat Cushion Natural Diamond Prices Comparison
As of October 2026, 0.4 carat cushion natural diamonds in the 0.40–0.49 carat benchmark range usually range from $321 to $1,812, with an average price of $613.Compare 246 verified listings across 9 retailers tracked by CaratRadar.
0.4 Carat Cushion Natural Diamond Market Overview
CaratRadar currently tracks 246 verified 0.4-carat cushion natural diamonds in the 0.40–0.49 carat benchmark range, listed across 9 online retailers. Prices in this segment range from $321 to $1,812, with an average asking price of $613 and a median of $572.
The price spread of $1,491 (82.3% 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.
246 diamonds tracked in the 0.40–0.49 carat benchmark
Price range: $321 to $1,812
Average price: $613
Median price: $572
Available across 9 retailers
Savings potential: up to 82.3%
Price Range Overview
As of Oct 13, 2026Real market range for this carat, shape, and diamond type.
246
$321
$613
$572
$1,812
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.
Save 28.2%GIA | 0.45ct | Cushion | F | SI2 | Good
From $321
Compare at $448
Save 36%GIA | 0.41ct | Cushion | K | VS1 | Excellent
From $328
Compare at $512
Save 10.3%GIA | 0.41ct | Cushion | L | SI2 | Excellent
From $334
Compare at $372
Save 40.4%GIA | 0.45ct | Cushion | E | SI1 | Excellent
From $340
Compare at $570
Save 34.2%GIA | 0.48ct | Cushion | H | SI2 | Good
From $341
Compare at $518
Save 10.5%GIA | 0.43ct | Cushion | K | VVS1 | Excellent
From $349
Compare at $390
Save 37.8%GIA | 0.41ct | Cushion | D | VS2 | Excellent
From $370
Compare at $595
Save 42.9%GIA | 0.41ct | Cushion | E | VS2 | Ideal
From $371
Compare at $650
Save 11.3%GIA | 0.41ct | Cushion | L | VS1 | Good
From $388
Compare at $437
Save 41%GIA | 0.43ct | Cushion | I | SI2 | Excellent
From $393
Compare at $666
Save 14.1%GIA | 0.42ct | Cushion | J | VS2 | Excellent
From $393
Compare at $458
Save 26.4%GIA | 0.41ct | Cushion | K | VS1 | Good
From $394
Compare at $535
Save 41.2%GIA | 0.45ct | Cushion | K | VS1 | Excellent
From $402
Compare at $684
Save 24%GIA | 0.41ct | Cushion | I | VS1 | Ideal
From $409
Compare at $538
Save 30.8%GIA | 0.41ct | Cushion | E | SI1 | Ideal
From $412
Compare at $596
IGI | 0.41ct | Cushion | K | SI1 | Very Good
From $413
Compare at $413
Save 38.5%GIA | 0.41ct | Cushion | E | SI1 | Good
From $415
Compare at $675
Save 16.1%GIA | 0.41ct | Cushion | J | SI1 | Very Good
From $416
Compare at $496
Save 18.6%GIA | 0.41ct | Cushion | K | VS1 | Excellent
From $419
Compare at $515
GIA | 0.45ct | Cushion | K | VS1 | Excellent
From $426
Compare at $472
Save 23.9%GIA | 0.41ct | Cushion | E | SI1 | Good
From $427
Compare at $561
Save 23.9%GIA | 0.41ct | Cushion | H | VVS2 | Ideal
From $428
Compare at $563
Save 39.4%GIA | 0.43ct | Cushion | E | SI1 | Ideal
From $430
Compare at $710
Save 23.9%GIA | 0.42ct | Cushion | I | VS1 | Excellent
From $432
Compare at $568
Save 42.1%GIA | 0.48ct | Cushion | K | VVS1 | Excellent
From $435
Compare at $752
Save 34.1%GIA | 0.48ct | Cushion | E | SI1 | Very Good
From $438
Compare at $665
Save 12.3%GIA | 0.42ct | Cushion | L | VS1 | Excellent
From $442
Compare at $504
Save 16.6%GIA | 0.41ct | Cushion | J | VS1 | Excellent
From $447
Compare at $536
GIA | 0.45ct | Cushion | J | VS2 | Excellent
From $448
Compare at $477
Save 36.7%GIA | 0.45ct | Cushion | J | VVS2 | Excellent
From $449
Compare at $709
Save 17.4%GIA | 0.45ct | Cushion | L | VS1 | Excellent
From $451
Compare at $546
Save 12.8%GIA | 0.41ct | Cushion | J | VVS2 | Excellent
From $451
Compare at $517
Save 12.6%GIA | 0.48ct | Cushion | F | SI1 | Excellent
From $453
Compare at $519
IGI | 0.44ct | Cushion | K | VS1 | Very Good
From $454
Compare at $455
GIA | 0.46ct | Cushion | J | VS2 | Excellent
From $454
Compare at $481
Save 36.8%GIA | 0.41ct | Cushion | J | VS1 | Excellent
From $454
Compare at $719
Save 36.8%GIA | 0.41ct | Cushion | I | VS2 | Excellent
From $455
Compare at $720
Save 37.8%GIA | 0.44ct | Cushion | I | SI2 | Very Good
From $457
Compare at $735
Save 37%GIA | 0.42ct | Cushion | I | VVS2 | Good
From $459
Compare at $729
Save 25.6%GIA | 0.42ct | Cushion | I | VS2 | Excellent
From $460
Compare at $618
GIA | 0.41ct | Cushion | J | VVS1 | Excellent
From $463
Compare at $487
Save 19%GIA | 0.47ct | Cushion | I | SI2 | Excellent
From $466
Compare at $575
GIA | 0.42ct | Cushion | G | SI2 | Excellent
From $470
Compare at $699
GIA | 0.43ct | Cushion | E | SI2 | Ideal
From $471
Compare at $515
GIA | 0.46ct | Cushion | K | VS2 | Excellent
From $473
Compare at $515
Save 23.8%GIA | 0.41ct | Cushion | H | VS1 | Good
From $476
Compare at $625
Save 23.8%GIA | 0.41ct | Cushion | G | VS1 | Ideal
From $477
Compare at $626
Save 37.6%GIA | 0.41ct | Cushion | E | VS2 | Excellent
From $479
Compare at $768
Save 17.8%GIA | 0.41ct | Cushion | H | SI1 | Very Good
From $481
Compare at $585
Save 23.7%GIA | 0.43ct | Cushion | J | VS2 | Excellent
From $481
Compare at $630
Entry pricing in this benchmark range starts around $321.
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 $1,491 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 $572 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 246 comparable stones in the 0.40–0.49 carat benchmark range. Prices start around $321 and go up to $1,812.
Based on the latest market data, the average asking price is about $613 with a median around $572.
The observed spread is roughly $1,491 across tracked listings, which is about 82.3% from highest to lowest offer in the 0.40–0.49 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 $613. The median price is $572, 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 9 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 $1,491 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 the 0.40–0.49 carat Cushion diamond benchmark.