0.4 Carat Cushion Lab Grown Diamond Prices Comparison
As of February 2026, 0.4 carat cushion lab grown diamonds usually range from $222 to $540, with an average price of $292.In the last month, prices for these diamonds are down 0.2%.Compare 271 verified listings across 3 retailers tracked by CaratRadar.
0.4 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 271 verified 0.4-carat cushion lab grown diamonds listed across 3 online retailers. Prices in this segment range from $222 to $540, with an average asking price of $292 and a median of $284.
The price spread of $318 (58.9% 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.
271 diamonds tracked in this segment
Price range: $222 to $540
Average price: $292
Median price: $284
Available across 3 retailers
Savings potential: up to 58.9%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
271
$222
$292
$284
$540
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
IGISave 33.4%0.35ct | Cushion | D | VS1 | Ideal
From $309
Compare at $464
IGISave 41.6%0.35ct | Cushion | D | VVS1 | Ideal
From $267
Compare at $457
IGISave 33.2%0.35ct | Cushion | D | VVS2 | Excellent
From $311
Compare at $465
IGISave 30.4%0.35ct | Cushion | E | VVS2 | Fair
From $237
Compare at $340
IGISave 25.3%0.35ct | Cushion | D | VVS2 | Good
From $261
Compare at $350
IGISave 54.6%0.35ct | Cushion | E | VS1 | Very Good
From $247
Compare at $545
IGISave 34.3%0.35ct | Cushion | D | VVS1 | Very Good
From $272
Compare at $415
IGI0.35ct | Cushion | D | VVS1 | Very Good
From $310
Compare at $310
IGISave 52%0.35ct | Cushion | E | VVS2 | Very Good
From $298
Compare at $622
IGISave 33.4%0.35ct | Cushion | D | VS1 | Ideal
From $309
Compare at $464
IGISave 28.9%0.36ct | Cushion | D | VVS2 | Ideal
From $319
Compare at $449
IGISave 41.6%0.36ct | Cushion | D | VVS1 | Excellent
From $274
Compare at $470
IGISave 53.3%0.36ct | Cushion | E | VVS2 | Ideal
From $272
Compare at $583
IGI0.36ct | Cushion | E | VVS2 | Very Good
From $274
Compare at $300
IGISave 31.1%0.36ct | Cushion | E | VS2 | Very Good
From $227
Compare at $330
IGISave 28.9%0.36ct | Cushion | D | VVS2 | Excellent
From $319
Compare at $449
IGISave 33.5%0.36ct | Cushion | D | VVS2 | Very Good
From $291
Compare at $438
IGISave 28.9%0.36ct | Cushion | D | VVS2 | Ideal
From $319
Compare at $449
IGISave 41.6%0.36ct | Cushion | D | VVS1 | Ideal
From $274
Compare at $470
IGISave 36.3%0.36ct | Cushion | D | VVS2 | Ideal
From $292
Compare at $459
IGISave 32.9%0.36ct | Cushion | D | VS1 | Ideal
From $265
Compare at $395
IGISave 33.2%0.37ct | Cushion | D | VS2 | Ideal
From $308
Compare at $461
IGISave 41.7%0.37ct | Cushion | D | VVS2 | Ideal
From $268
Compare at $460
IGISave 33.2%0.37ct | Cushion | D | VS2 | Ideal
From $308
Compare at $461
IGISave 41.7%0.37ct | Cushion | D | VVS2 | Ideal
From $268
Compare at $460
IGISave 55%0.37ct | Cushion | E | VS1 | Ideal
From $241
Compare at $535
IGISave 41.7%0.37ct | Cushion | D | VVS2 | Ideal
From $268
Compare at $460
IGISave 41.5%0.37ct | Cushion | D | VVS1 | Ideal
From $282
Compare at $482
IGISave 41.5%0.37ct | Cushion | D | VVS1 | Ideal
From $282
Compare at $482
IGISave 41.7%0.37ct | Cushion | D | VVS2 | Ideal
From $268
Compare at $460
IGISave 28.6%0.37ct | Cushion | E | VVS2 | Ideal
From $317
Compare at $444
IGISave 52.4%0.37ct | Cushion | D | VVS1 | Ideal
From $291
Compare at $611
IGISave 53.9%0.37ct | Cushion | E | VS1 | Very Good
From $259
Compare at $563
IGISave 32.3%0.37ct | Cushion | D | VVS2 | Ideal
From $274
Compare at $405
IGISave 27.3%0.37ct | Cushion | E | VS1 | Good
From $262
Compare at $360
IGISave 41.5%0.37ct | Cushion | D | VVS1 | Ideal
From $282
Compare at $482
IGISave 41.5%0.37ct | Cushion | D | VVS1 | Ideal
From $282
Compare at $482
IGISave 41.7%0.37ct | Cushion | D | VVS2 | Ideal
From $268
Compare at $460
IGISave 41.6%0.37ct | Cushion | D | VS1 | Ideal
From $267
Compare at $457
IGISave 41.6%0.37ct | Cushion | E | VVS1 | Ideal
From $267
Compare at $457
IGISave 41.5%0.37ct | Cushion | D | VVS1 | Good
From $282
Compare at $482
IGISave 34%0.37ct | Cushion | D | VVS2 | Very Good
From $274
Compare at $415
IGISave 33.7%0.37ct | Cushion | D | VVS2 | Very Good
From $274
Compare at $413
IGISave 41.8%0.38ct | Cushion | D | VVS2 | Ideal
From $275
Compare at $473
IGISave 52%0.38ct | Cushion | D | VVS1 | Ideal
From $299
Compare at $623
IGISave 52.9%0.38ct | Cushion | E | VVS2 | Very Good
From $280
Compare at $594
IGISave 41.7%0.38ct | Cushion | E | VVS1 | Ideal
From $274
Compare at $470
IGISave 41.5%0.38ct | Cushion | D | VVS1 | Ideal
From $289
Compare at $495
IGISave 12.5%0.38ct | Cushion | D | VS1 | Excellent
From $280
Compare at $320
IGISave 41.5%0.38ct | Cushion | D | VVS1 | Excellent
From $289
Compare at $495
Entry pricing in this category starts around $222.
What to Know When Shopping for 0.4 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $318 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 $284 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.
- 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 271 comparable stones in this segment. Prices start around $222 and go up to $540.
Based on the latest market data, the average asking price is about $292 with a median around $284.
The observed spread is roughly $318 across tracked listings, which is about 58.9% 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 $284, 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 3 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 $318 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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