0.4 Carat Radiant Lab Grown Diamond Prices Comparison
As of April 2026, 0.4 carat radiant lab grown diamonds usually range from $113 to $972, with an average price of $395.In the last month, prices for these diamonds are down 0.6%.Compare 336 verified listings across 2 retailers tracked by CaratRadar.
0.4 Carat Radiant Lab Grown Diamond Market Overview
CaratRadar currently tracks 336 verified 0.4-carat radiant lab grown diamonds listed across 2 online retailers. Prices in this segment range from $113 to $972, with an average asking price of $395 and a median of $380.
The price spread of $859 (88.4% 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.
336 diamonds tracked in this segment
Price range: $113 to $972
Average price: $395
Median price: $380
Available across 2 retailers
Savings potential: up to 88.4%
Price Range Overview
As of Apr 14, 2026Real market range for this carat, shape, and diamond type.
336
$113
$395
$380
$972
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 33.2%IGI | 0.41ct | Radiant | G | VVS2 | Very Good
From $261
Compare at $390
Save 31.4%IGI | 0.41ct | Radiant | G | VS1 | Ideal
From $261
Compare at $380
Save 14.1%IGI | 0.41ct | Radiant | F | VVS2 | Ideal
From $268
Compare at $312
Save 36.2%IGI | 0.41ct | Radiant | D | VS1 | Very Good
From $236
Compare at $370
IGI | 0.41ct | Radiant | D | VVS1 | Excellent
From $272
Compare at $286
IGI | 0.41ct | Radiant | E | IF | Ideal
From $460
Compare at $486
Save 14.1%IGI | 0.41ct | Radiant | D | VVS2 | Excellent
From $277
Compare at $322
IGI | 0.41ct | Radiant | D | IF | Ideal
From $473
Compare at $500
IGI | 0.41ct | Radiant | D | VVS1 | Ideal
From $272
Compare at $286
Save 14.3%IGI | 0.41ct | Radiant | D | VS1 | Very Good
From $255
Compare at $297
Save 28.6%IGI | 0.41ct | Radiant | E | VVS1 | Ideal
From $269
Compare at $376
Save 28.6%IGI | 0.41ct | Radiant | D | VVS2 | Ideal
From $269
Compare at $376
Save 35.1%IGI | 0.41ct | Radiant | E | VVS2 | Very Good
From $240
Compare at $370
Save 23%IGI | 0.41ct | Radiant | E | VVS2 | Excellent
From $199
Compare at $258
IGI | 0.41ct | Radiant | E | VS1 | Very Good
From $209
Compare at $223
Save 35.1%IGI | 0.41ct | Radiant | E | VVS2 | Excellent
From $240
Compare at $370
Save 36.2%IGI | 0.41ct | Radiant | D | VS1 | Good
From $236
Compare at $370
Save 29.8%IGI | 0.41ct | Radiant | D | VVS2 | Ideal
From $281
Compare at $400
Save 44.4%IGI | 0.41ct | Radiant | F | VS1 | Very Good
From $200
Compare at $360
Save 41.6%IGI | 0.41ct | Radiant | D | VS1 | Excellent
From $216
Compare at $370
Save 21.9%IGI | 0.41ct | Radiant | G | VVS1 | Very Good
From $289
Compare at $370
Save 43.1%IGI | 0.41ct | Radiant | F | VVS2 | Ideal
From $205
Compare at $360
Save 33%IGI | 0.41ct | Radiant | D | VVS1 | Ideal
From $268
Compare at $400
Save 34.7%IGI | 0.41ct | Radiant | D | VVS2 | Ideal
From $410
Compare at $628
Save 33.9%IGI | 0.41ct | Radiant | D | VVS1 | Very Good
From $238
Compare at $360
Save 28.1%IGI | 0.41ct | Radiant | D | VVS1 | Very Good
From $277
Compare at $385
Save 31.6%IGI | 0.42ct | Radiant | G | VS1 | Ideal
From $267
Compare at $390
Save 31.6%IGI | 0.42ct | Radiant | F | VS1 | Ideal
From $267
Compare at $390
Save 29.7%IGI | 0.42ct | Radiant | G | SI1 | Ideal
From $267
Compare at $380
Save 31.6%IGI | 0.42ct | Radiant | G | VVS2 | Ideal
From $267
Compare at $390
IGI | 0.42ct | Radiant | H | VS1 | Very Good
From $374
Compare at $380
Save 38.6%IGI | 0.42ct | Radiant | F | VVS2 | Good
From $227
Compare at $370
Save 24.8%IGI | 0.42ct | Radiant | D | VVS2 | Ideal
From $225
Compare at $299
IGI | 0.42ct | Radiant | D | VVS2 | Ideal
From $270
Compare at $283
Save 14.2%IGI | 0.42ct | Radiant | E | VVS2 | Ideal
From $276
Compare at $322
IGI | 0.42ct | Radiant | D | VVS1 | Ideal
From $278
Compare at $293
IGI | 0.42ct | Radiant | D | IF | Very Good
From $270
Compare at $283
IGI | 0.42ct | Radiant | D | VVS1 | Ideal
From $270
Compare at $283
IGI | 0.42ct | Radiant | D | VVS1 | Ideal
From $278
Compare at $293
IGI | 0.42ct | Radiant | D | VVS1 | Ideal
From $278
Compare at $293
Save 39.7%IGI | 0.42ct | Radiant | D | VVS2 | Ideal
From $229
Compare at $380
Save 30%IGI | 0.42ct | Radiant | D | VS2 | Ideal
From $248
Compare at $354
Save 39.5%IGI | 0.42ct | Radiant | E | VVS2 | Very Good
From $230
Compare at $380
Save 24.8%IGI | 0.42ct | Radiant | D | VVS2 | Very Good
From $225
Compare at $299
Save 40.3%IGI | 0.42ct | Radiant | D | VVS2 | Ideal
From $227
Compare at $380
Save 38.4%IGI | 0.42ct | Radiant | D | VS2 | Very Good
From $228
Compare at $370
Save 24.8%IGI | 0.42ct | Radiant | D | VVS2 | Good
From $225
Compare at $299
Save 14.4%IGI | 0.42ct | Radiant | D | VS1 | Very Good
From $241
Compare at $281
IGI | 0.42ct | Radiant | E | VVS2 | Very Good
From $203
Compare at $212
Save 24.9%IGI | 0.42ct | Radiant | D | VS1 | Ideal
From $206
Compare at $274
Entry pricing in this category starts around $113.
What to Know When Shopping for 0.4 Carat Radiant Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $859 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 $380 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.
- Radiant cuts combine the elegance of emerald shapes with the brilliance of round cuts, offering good value per carat.
Frequently Asked Questions
We currently track 336 comparable stones in this segment. Prices start around $113 and go up to $972.
Based on the latest market data, the average asking price is about $395 with a median around $380.
The observed spread is roughly $859 across tracked listings, which is about 88.4% 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 $380, 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 2 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 $859 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 Lab Grown inventory for 0.4 carat Radiant diamonds.