0.4 Carat Cushion Natural Diamond Prices Comparison
As of February 2026, 0.4 carat cushion natural diamonds usually range from $373 to $20,857, with an average price of $954.In the last month, prices for these diamonds are down 3.9%.Compare 340 verified listings across 4 retailers tracked by CaratRadar.
0.4 Carat Cushion Natural Diamond Market Overview
CaratRadar currently tracks 340 verified 0.4-carat cushion natural diamonds listed across 4 online retailers. Prices in this segment range from $373 to $20,857, with an average asking price of $954 and a median of $881.
The price spread of $20,484 (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.
340 diamonds tracked in this segment
Price range: $373 to $20,857
Average price: $954
Median price: $881
Available across 4 retailers
Savings potential: up to 98.2%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
340
$373
$954
$881
$20,857
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
GIASave 15.1%0.35ct | Cushion | I | VS2 | Excellent
From $518
Compare at $610
0.36ct | Cushion | G | VVS1 | Ideal
From $790
Compare at $1,005
GIA0.36ct | Cushion | F | SI1 | Ideal
From $640
Compare at $700
GIASave 24.3%0.36ct | Cushion | D | VVS1 | Excellent
From $610
Compare at $806
0.36ct | Cushion | E | VVS2 | Ideal
From $790
Compare at $1,009
GIA0.38ct | Cushion | F | SI1 | Ideal
From $647
Compare at $710
GIASave 23.2%0.39ct | Cushion | G | VS2 | Very Good
From $550
Compare at $716
GIASave 23.4%0.4ct | Cushion | E | VS2 | Ideal
From $580
Compare at $757
GIASave 14%0.4ct | Cushion | F | VS1 | Excellent
From $756
Compare at $879
GIASave 39.4%0.4ct | Cushion | F | SI1 | Excellent
From $697
Compare at $1,151
GIASave 25.7%0.4ct | Cushion | F | VVS1 | Ideal
From $676
Compare at $910
GIASave 36%0.4ct | Cushion | D | VS1 | Good
From $894
Compare at $1,397
GIASave 17%0.4ct | Cushion | E | VVS2 | Very Good
From $643
Compare at $775
GIASave 33.2%0.4ct | Cushion | D | VVS2 | Excellent
From $1,161
Compare at $1,737
GIASave 46.4%0.4ct | Cushion | I | VS1 | Very Good
From $512
Compare at $954
GIASave 47.8%0.4ct | Cushion | G | VS1 | Good
From $600
Compare at $1,149
GIASave 34.9%0.4ct | Cushion | D | VVS2 | Excellent
From $929
Compare at $1,427
GIASave 18.4%0.4ct | Cushion | I | VS1 | Very Good
From $576
Compare at $706
GIA0.4ct | Cushion | D | VVS2 | Good
From $870
Compare at $938
GIASave 28.5%0.4ct | Cushion | FANCY | SI1 | Good
From $20,857
Compare at $29,175
GIASave 34.5%0.4ct | Cushion | D | SI1 | Excellent
From $769
Compare at $1,174
GIASave 41.4%0.4ct | Cushion | K | VVS2 | Very Good
From $473
Compare at $807
GIASave 35.7%0.4ct | Cushion | D | VS1 | Excellent
From $1,118
Compare at $1,739
GIASave 35.2%0.4ct | Cushion | D | VS2 | Excellent
From $1,057
Compare at $1,630
GIASave 43.6%0.4ct | Cushion | I | VVS1 | Ideal
From $593
Compare at $1,051
GIASave 12.2%0.4ct | Cushion | F | VS2 | Very Good
From $758
Compare at $864
GIASave 12.6%0.4ct | Cushion | H | VVS1 | Good
From $718
Compare at $821
GIASave 37.4%0.4ct | Cushion | F | SI1 | Excellent
From $772
Compare at $1,233
GIASave 41.5%0.4ct | Cushion | H | VVS2 | Ideal
From $627
Compare at $1,073
GIASave 37%0.4ct | Cushion | D | SI1 | Excellent
From $586
Compare at $929
GIASave 33.2%0.4ct | Cushion | D | VVS2 | Excellent
From $1,161
Compare at $1,737
GIASave 35.3%0.4ct | Cushion | G | VS2 | Excellent
From $860
Compare at $1,330
GIASave 38.9%0.4ct | Cushion | G | VVS2 | Very Good
From $700
Compare at $1,145
GIASave 47.1%0.4ct | Cushion | G | VS1 | Good
From $624
Compare at $1,179
GIASave 46.7%0.4ct | Cushion | J | VVS2 | Very Good
From $489
Compare at $917
GIASave 39%0.4ct | Cushion | F | VS1 | Very Good
From $726
Compare at $1,191
GIASave 12.7%0.4ct | Cushion | I | VVS1 | Very Good
From $637
Compare at $730
GIASave 10.7%0.4ct | Cushion | D | SI2 | Excellent
From $772
Compare at $865
GIASave 37.2%0.4ct | Cushion | D | VVS1 | Excellent
From $1,161
Compare at $1,849
GIASave 37.2%0.4ct | Cushion | H | VVS1 | Excellent
From $745
Compare at $1,186
GIASave 14.9%0.4ct | Cushion | I | VS2 | Very Good
From $587
Compare at $690
GIASave 23.7%0.4ct | Cushion | F | VS2 | Ideal
From $540
Compare at $708
GIASave 23.6%0.4ct | Cushion | J | VS1 | Excellent
From $493
Compare at $645
GIASave 39.1%0.4ct | Cushion | I | VS2 | Excellent
From $654
Compare at $1,074
GIASave 25.7%0.4ct | Cushion | F | VVS1 | Ideal
From $676
Compare at $910
GIASave 36.1%0.4ct | Cushion | E | VS2 | Excellent
From $826
Compare at $1,293
GIASave 37.7%0.4ct | Cushion | F | VS2 | Good
From $930
Compare at $1,494
GIASave 35.8%0.4ct | Cushion | I | VVS2 | Excellent
From $610
Compare at $951
GIASave 34.3%0.4ct | Cushion | D | VS1 | Excellent
From $633
Compare at $964
GIASave 34.9%0.4ct | Cushion | D | VS2 | Excellent
From $1,075
Compare at $1,652
Entry pricing in this category starts around $373.
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 $20,484 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 $881 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 340 comparable stones in this segment. Prices start around $373 and go up to $20,857.
Based on the latest market data, the average asking price is about $954 with a median around $881.
The observed spread is roughly $20,484 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 our data, the median price is $881, which represents the midpoint of the market. Anything below this figure from a reputable retailer is a solid deal.
We currently track this stone category across 4 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 $20,484 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.