0.4 Carat Natural Diamond Prices Comparison
As of May 2026, the average price of a 0.4 carat natural diamond is $729.0.4 carat diamonds can cost anywhere from $141 to $17,838 depending on shape, color, clarity, and other factors.In the last month, prices for these diamonds are down 1.2%.Compare 18,500 verified listings across 8 retailers in the tables below.
0.4 Carat Natural Diamond Market Overview
CaratRadar currently tracks 18,500 verified 0.4-carat natural diamonds listed across 8 online retailers. Prices in this segment range from $141 to $17,838, with an average asking price of $729 and a median of $693.
The price spread of $17,696 (99.2% 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.
18,500 diamonds tracked in this segment
Price range: $141 to $17,838
Average price: $729
Median price: $693
Available across 8 retailers
Savings potential: up to 99.2%
Price Range Overview
As of May 29, 2026Real market range for this carat, shape, and diamond type.
18,500
$141
$729
$693
$17,838
Price History
Price Comparison Matrix
0.4 Carat Natural Diamond Prices by Shape
Shape-level averages for this carat and type. Open each shape page for full market detail.
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
Save 14.2%GIA | 0.41ct | Round | L | SI2 | Good
From $238
Compare at $277
Save 10.5%IGI | 0.41ct | Round | K | SI1 | Excellent
From $245
Compare at $274
Save 25.3%GIA | 0.46ct | Emerald | K | SI1 | Excellent
From $249
Compare at $333
Save 30.8%GIA | 0.43ct | Round | L | SI1 | Excellent
From $256
Compare at $370
Save 14.8%IGI | 0.42ct | Round | K | SI1 | Excellent
From $259
Compare at $304
Save 15.1%IGI | 0.41ct | Round | K | SI1 | Excellent
From $262
Compare at $309
Save 25.6%GIA | 0.43ct | Round | J | SI1 | Ideal
From $267
Compare at $359
Save 36%GIA | 0.41ct | Oval | K | SI2 | Excellent
From $268
Compare at $419
Save 20.2%GIA | 0.41ct | Round | K | SI1 | Excellent
From $271
Compare at $340
Save 35.4%GIA | 0.41ct | Oval | K | SI1 | Excellent
From $274
Compare at $424
Save 27.9%GIA | 0.42ct | Round | L | SI2 | Excellent
From $277
Compare at $384
Save 33.7%GIA | 0.41ct | Round | J | SI2 | Very Good
From $278
Compare at $419
Save 33.7%GIA | 0.41ct | Round | J | SI2 | Very Good
From $278
Compare at $419
Save 33%GIA | 0.41ct | Round | J | SI2 | Very Good
From $278
Compare at $415
Save 33%GIA | 0.41ct | Round | J | SI2 | Very Good
From $278
Compare at $415
Save 21.9%GIA | 0.41ct | Round | J | SI2 | Very Good
From $280
Compare at $359
Save 52.6%GIA | 0.47ct | Pear | L | SI2 | Excellent
From $280
Compare at $591
Save 23%GIA | 0.41ct | Heart | L | SI2 | Very Good
From $281
Compare at $365
Save 23.6%GIA | 0.43ct | Round | L | SI2 | Excellent
From $284
Compare at $372
Save 11.4%IGI | 0.41ct | Round | K | SI1 | Excellent
From $287
Compare at $324
Save 11.4%IGI | 0.41ct | Round | K | SI1 | Very Good
From $287
Compare at $324
Save 26.1%GIA | 0.46ct | Emerald | K | VVS2 | Excellent
From $289
Compare at $391
Save 23.7%GIA | 0.46ct | Round | L | VS2 | Very Good
From $290
Compare at $380
GIA | 0.46ct | Pear | K | SI1 | Ideal
From $290
Compare at $312
Save 23.2%GIA | 0.41ct | Round | J | SI1 | Ideal
From $291
Compare at $379
Save 16.9%GIA | 0.41ct | Emerald | I | SI2 | Ideal
From $291
Compare at $350
Save 16.5%IGI | 0.41ct | Round | K | VS2 | Excellent
From $291
Compare at $348
Save 22.9%GIA | 0.41ct | Round | H | SI2 | Very Good
From $293
Compare at $380
Save 23.1%GIA | 0.41ct | Emerald | J | VS2 | Excellent
From $296
Compare at $385
Save 21.5%GIA | 0.41ct | Emerald | I | SI2 | Excellent
From $298
Compare at $380
Save 38.2%GIA | 0.42ct | Pear | L | SI1 | Excellent
From $298
Compare at $482
Save 22.1%GIA | 0.41ct | Round | J | SI1 | Ideal
From $298
Compare at $383
Save 11.9%GIA | 0.41ct | Oval | K | SI1 | Very Good
From $298
Compare at $338
Save 35.6%GIA | 0.44ct | Round | L | VS2 | Ideal
From $298
Compare at $463
Save 30.7%GIA | 0.41ct | Round | J | SI1 | Ideal
From $298
Compare at $430
Save 28%GIA | 0.41ct | Round | J | SI1 | Ideal
From $298
Compare at $414
Save 44.4%GIA | 0.41ct | Round | K | SI1 | Very Good
From $300
Compare at $540
Save 15.2%GIA | 0.41ct | Round | K | SI2 | Excellent
From $301
Compare at $355
Save 29.8%GIA | 0.46ct | Round | L | SI2 | Ideal
From $301
Compare at $429
Save 19.7%GIA | 0.41ct | Round | K | SI2 | Excellent
From $301
Compare at $375
Save 31%GIA | 0.46ct | Round | L | SI2 | Ideal
From $301
Compare at $436
Save 11.3%IGI | 0.43ct | Round | K | SI1 | Excellent
From $301
Compare at $340
Save 21.5%GIA | 0.46ct | Pear | K | SI2 | Ideal
From $302
Compare at $385
GIA | 0.41ct | Emerald | F | SI2 | Ideal
From $302
Compare at $324
Save 20.8%GIA | 0.43ct | Round | J | SI1 | Ideal
From $303
Compare at $383
GIA | 0.41ct | Round | H | SI2 | Very Good
From $303
Compare at $326
Save 20.1%GIA | 0.41ct | Round | K | VVS2 | Ideal
From $304
Compare at $381
Save 32.7%GIA | 0.41ct | Pear | J | SI2 | Excellent
From $304
Compare at $452
Save 22.2%GIA | 0.41ct | Emerald | F | SI2 | Good
From $305
Compare at $392
Save 20%GIA | 0.41ct | Round | J | SI2 | Ideal
From $305
Compare at $381
Entry pricing in this category starts around $141.
What to Know When Shopping for 0.4 Carat Natural Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $17,696 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 $693 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.
Frequently Asked Questions
We currently track 18,500 comparable stones in this segment. Prices start around $141 and go up to $17,838.
Based on the latest market data, the average asking price is about $729 with a median around $693.
The observed spread is roughly $17,696 across tracked listings, which is about 99.2% from highest to lowest offer in this bucket.
We refresh pricing data daily so these pages stay current with market changes.
Based on completed market data, the fair market benchmark is $729. The median price is $693, 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 8 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 $17,696 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.
Related Price Categories
Explore adjacent carat ranges and shapes to compare market shifts.
0.4 Carat Round Natural Diamond Prices
0.4 Carat Oval Natural Diamond Prices
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