0.4 Carat Round Lab Grown Diamond Prices Comparison
As of February 2026, 0.4 carat round lab grown diamonds usually range from $138 to $690, with an average price of $233.In the last month, prices for these diamonds are down 0.9%.Compare 10,994 verified listings across 4 retailers tracked by CaratRadar.
0.4 Carat Round Lab Grown Diamond Market Overview
CaratRadar currently tracks 10,994 verified 0.4-carat round lab grown diamonds listed across 4 online retailers. Prices in this segment range from $138 to $690, with an average asking price of $233 and a median of $216.
The price spread of $552 (80.0% 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.
10,994 diamonds tracked in this segment
Price range: $138 to $690
Average price: $233
Median price: $216
Available across 4 retailers
Savings potential: up to 80.0%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
10,994
$138
$233
$216
$690
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 57.3%0.35ct | Round | E | SI1 | Ideal
From $440
Compare at $1,030
IGISave 68.2%0.35ct | Round | D | VVS1 | Ideal
From $590
Compare at $1,856
IGISave 63.4%0.35ct | Round | D | VS1 | Ideal
From $520
Compare at $1,420
IGISave 58.3%0.35ct | Round | D | SI1 | Ideal
From $197
Compare at $473
IGISave 57.7%0.35ct | Round | D | SI1 | Very Good
From $460
Compare at $1,087
IGISave 61.5%0.35ct | Round | D | SI1 | Ideal
From $460
Compare at $1,195
IGISave 62.4%0.35ct | Round | E | SI1 | Ideal
From $440
Compare at $1,170
IGISave 62.4%0.35ct | Round | E | SI1 | Ideal
From $440
Compare at $1,170
IGISave 63.4%0.35ct | Round | D | VS1 | Ideal
From $520
Compare at $1,420
IGISave 61.5%0.35ct | Round | D | SI1 | Very Good
From $460
Compare at $1,195
IGISave 58.1%0.35ct | Round | E | VS2 | Ideal
From $480
Compare at $1,145
IGISave 61.5%0.35ct | Round | D | SI1 | Very Good
From $460
Compare at $1,195
IGISave 57.3%0.35ct | Round | D | SI2 | Ideal
From $440
Compare at $1,030
IGISave 61.9%0.35ct | Round | E | VS2 | Ideal
From $480
Compare at $1,259
IGISave 64.4%0.35ct | Round | D | VVS2 | Ideal
From $550
Compare at $1,545
IGISave 63.4%0.35ct | Round | D | VS1 | Ideal
From $520
Compare at $1,420
IGISave 61.5%0.35ct | Round | D | SI1 | Very Good
From $460
Compare at $1,195
IGISave 56.6%0.35ct | Round | E | SI1 | Good
From $221
Compare at $509
IGISave 59.6%0.35ct | Round | D | VS2 | Ideal
From $262
Compare at $649
IGISave 59.6%0.35ct | Round | E | VS1 | Ideal
From $262
Compare at $649
IGISave 60.8%0.35ct | Round | E | VS1 | Ideal
From $238
Compare at $607
IGISave 57.7%0.35ct | Round | F | SI1 | Ideal
From $420
Compare at $992
IGISave 64.4%0.35ct | Round | D | VVS2 | Very Good
From $550
Compare at $1,545
IGISave 63.4%0.35ct | Round | D | VS1 | Very Good
From $520
Compare at $1,420
IGISave 63.4%0.35ct | Round | D | VS1 | Ideal
From $520
Compare at $1,420
IGISave 61.9%0.35ct | Round | E | VS2 | Ideal
From $480
Compare at $1,259
IGISave 62.4%0.35ct | Round | E | SI1 | Ideal
From $440
Compare at $1,170
IGISave 62.9%0.35ct | Round | D | VS2 | Ideal
From $490
Compare at $1,322
IGISave 64.4%0.35ct | Round | D | VVS2 | Ideal
From $550
Compare at $1,545
IGISave 63.4%0.35ct | Round | D | VS1 | Ideal
From $520
Compare at $1,420
IGISave 61.9%0.35ct | Round | E | VS2 | Ideal
From $480
Compare at $1,259
IGISave 63.4%0.35ct | Round | D | VS1 | Very Good
From $520
Compare at $1,420
IGISave 63.4%0.35ct | Round | D | VS1 | Very Good
From $520
Compare at $1,420
IGISave 62%0.35ct | Round | F | SI1 | Ideal
From $420
Compare at $1,105
IGISave 62.4%0.35ct | Round | E | SI1 | Ideal
From $440
Compare at $1,170
IGISave 62.4%0.35ct | Round | E | SI1 | Ideal
From $440
Compare at $1,170
IGISave 62%0.35ct | Round | F | SI1 | Ideal
From $420
Compare at $1,105
IGISave 61.9%0.35ct | Round | E | VS2 | Ideal
From $480
Compare at $1,259
IGISave 61.5%0.35ct | Round | F | VS2 | Ideal
From $460
Compare at $1,195
IGISave 57.3%0.35ct | Round | E | SI1 | Ideal
From $440
Compare at $1,030
IGISave 57.7%0.35ct | Round | E | SI2 | Ideal
From $420
Compare at $992
IGISave 62%0.35ct | Round | F | SI1 | Ideal
From $420
Compare at $1,105
IGISave 63.4%0.35ct | Round | D | VS1 | Ideal
From $520
Compare at $1,420
IGISave 61.9%0.35ct | Round | E | VS2 | Ideal
From $480
Compare at $1,259
IGISave 63.4%0.35ct | Round | D | VS1 | Ideal
From $520
Compare at $1,420
IGISave 48.8%0.35ct | Round | D | VS2 | Excellent
From $164
Compare at $320
IGISave 55.9%0.35ct | Round | E | VVS2 | Ideal
From $233
Compare at $528
IGISave 48.8%0.35ct | Round | D | VS2 | Excellent
From $164
Compare at $320
IGISave 63.3%0.35ct | Round | D | VVS2 | Very Good
From $167
Compare at $455
IGISave 57.8%0.35ct | Round | D | VVS2 | Ideal
From $204
Compare at $482
Entry pricing in this category starts around $138.
What to Know When Shopping for 0.4 Carat Round Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $552 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 $216 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.
- Round brilliants command a premium due to higher rough waste during cutting. If budget matters, consider oval or cushion shapes for similar visual size.
Frequently Asked Questions
We currently track 10,994 comparable stones in this segment. Prices start around $138 and go up to $690.
Based on the latest market data, the average asking price is about $233 with a median around $216.
The observed spread is roughly $552 across tracked listings, which is about 80.0% 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 $216, 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 $552 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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