3.5 Carat Lab Grown Diamond Prices Comparison
A 3.5 carat lab grown diamond of any shape typically costs $1,958 (median of 24,738 listings at 19 online stores). Average prices were flat over the last month. Updated .
Average $2,728. Listings run from $139 to $38,749 in the 3.50–3.99 carat range.
See the live listings3.5 Carat Lab Grown Diamond Market Overview
CaratRadar currently tracks 24,738 verified 3.5-carat lab grown diamonds in the 3.50–3.99 carat benchmark range, listed across 19 online retailers. Prices in this segment range from $139 to $38,749, with an average asking price of $2,728 and a median of $1,958.
Across this category, asking prices span $38,610 (99.6% from the most expensive to the cheapest listing). The same certified diamond can also be listed at different prices by different retailers, which is why CaratRadar compares stones by certificate number.
These figures use the same benchmark range throughout the page and 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.
24,738 diamonds tracked in the 3.50–3.99 carat benchmark
Price range: $139 to $38,749
Average price: $2,728
Median price: $1,958
Available across 19 retailers
Category price spread: 99.6%
Price Range Overview
As of Oct 23, 2026Real market range for this carat, shape, and diamond type.
24,738
$139
$2,728
$1,958
$38,749
Price History
Price Comparison Matrix
3.5 Carat Lab Grown Diamond Prices by Shape
Shape-level averages for this carat and type. Open each shape page for full market detail.
Compare nearby
Prices for the next carat weights, other shapes and the natural twin.
Nearby carat weights
Same size, natural
Live Listings
See all listingsCompare current retailer offers in the same benchmark range and open any listing for full details.
Save 73.3%IGI | 3.5ct | Round | G | VS1 | Ideal
From $493
Compare at $1,847
Save 73.3%IGI | 3.5ct | Oval | F | SI1 | Very Good
From $506
Compare at $1,895
Save 73.3%IGI | 3.54ct | Pear | G | VS1 | Ideal
From $512
Compare at $1,915
Save 38.4%IGI | 3.51ct | Round | FANCY | SI1 | Ideal
From $517
Compare at $839
Save 73.3%IGI | 3.59ct | Emerald | G | VS1 | Fair
From $519
Compare at $1,943
Save 73.3%IGI | 3.5ct | Round | F | VS2 | Excellent
From $520
Compare at $1,944
Save 73.3%IGI | 3.81ct | Oval | G | SI1 | Ideal
From $521
Compare at $1,951
Save 73.3%IGI | 3.71ct | Marquise | H | VVS2 | Ideal
From $521
Compare at $1,951
Save 73.3%IGI | 3.51ct | Oval | G | VS2 | Ideal
From $527
Compare at $1,974
Save 73.3%IGI | 3.51ct | Radiant | G | VS1 | Very Good
From $527
Compare at $1,974
Save 73.3%IGI | 3.61ct | Emerald | F | VS2 | Very Good
From $528
Compare at $1,977
Save 37.2%IGI | 3.52ct | Oval | FANCY | SI2 | Very Good
From $529
Compare at $842
Save 37.3%IGI | 3.53ct | Radiant | FANCY | SI1 | Very Good
From $530
Compare at $845
Save 18.3%IGI | 3.6ct | Princess | K | VS1 | Good
From $534
Compare at $654
Save 73.3%IGI | 3.54ct | Princess | H | VS2 | Very Good
From $537
Compare at $2,011
Save 73.3%IGI | 3.5ct | Princess | G | VVS2 | Very Good
From $537
Compare at $2,011
Save 73.3%IGI | 3.53ct | Oval | G | VVS2 | Very Good
From $537
Compare at $2,008
Save 73.3%IGI | 3.53ct | Pear | G | VVS2 | Excellent
From $537
Compare at $2,009
Save 60.3%IGI | 3.52ct | Emerald | F | VS1 | Very Good
From $539
Compare at $1,357
Save 73.3%IGI | 3.7ct | Round | H | VVS2 | Ideal
From $540
Compare at $2,022
Save 46.3%IGI | 3.7ct | Princess | G | VS1 | Very Good
From $542
Compare at $1,010
Save 46.3%IGI | 3.7ct | Marquise | G | VS1 | Very Good
From $542
Compare at $1,010
Save 73.3%IGI | 3.52ct | Round | G | VS1 | Ideal
From $542
Compare at $2,029
Save 73.3%IGI | 3.62ct | Oval | G | VS1 | Excellent
From $543
Compare at $2,032
Save 73.3%IGI | 3.53ct | Round | G | VVS2 | Excellent
From $543
Compare at $2,033
Save 73.3%IGI | 3.55ct | Emerald | F | VVS2 | Excellent
From $544
Compare at $2,036
Save 73.3%IGI | 3.5ct | Round | F | VS1 | Very Good
From $546
Compare at $2,043
Save 73.3%IGI | 3.52ct | Princess | H | VS2 | Ideal
From $547
Compare at $2,046
Save 73.3%IGI | 3.7ct | Round | F | VS1 | Excellent
From $547
Compare at $2,047
Save 68.6%IGI | 3.52ct | Emerald | E | SI1 | Excellent
From $547
Compare at $1,741
Save 73.3%IGI | 3.53ct | Princess | H | VS2 | Ideal
From $548
Compare at $2,051
Save 73.3%IGI | 3.63ct | Round | E | SI1 | Excellent
From $548
Compare at $2,052
Save 73.3%IGI | 3.56ct | Radiant | G | VS1 | Very Good
From $548
Compare at $2,050
Save 73.3%IGI | 3.66ct | Round | E | VS1 | Ideal
From $549
Compare at $2,053
Save 56.8%IGI | 3.52ct | Emerald | G | VVS2 | Very Good
From $550
Compare at $1,272
Save 73.3%IGI | 3.53ct | Oval | H | VS1 | Excellent
From $550
Compare at $2,059
Save 77.4%IGI | 3.58ct | Round | G | VS1 | Ideal
From $551
Compare at $2,436
Save 73.3%IGI | 3.69ct | Oval | G | VS1 | Good
From $553
Compare at $2,068
Save 73.3%IGI | 3.62ct | Princess | G | VS1 | Ideal
From $553
Compare at $2,069
Save 68.5%IGI | 3.53ct | Emerald | G | VS1 | Ideal
From $553
Compare at $1,754
Save 73.3%IGI | 3.51ct | Oval | G | VS1 | Very Good
From $554
Compare at $2,072
Save 73.3%IGI | 3.52ct | Round | G | VVS2 | Ideal
From $555
Compare at $2,078
Save 73.3%IGI | 3.5ct | Round | E | VS2 | Excellent
From $555
Compare at $2,076
Save 73.4%IGI | 3.57ct | Round | I | VS1 | Ideal
From $558
Compare at $2,101
Save 73.3%IGI | 3.5ct | Oval | G | VS2 | Good
From $559
Compare at $2,091
Save 73.3%IGI | 3.51ct | Oval | G | VS1 | Very Good
From $560
Compare at $2,097
Save 68.8%IGI | 3.62ct | Emerald | H | VVS2 | Ideal
From $560
Compare at $1,797
Save 73.3%IGI | 3.55ct | Radiant | E | VS2 | Very Good
From $560
Compare at $2,095
Save 73.3%IGI | 3.51ct | Oval | G | VS2 | Excellent
From $560
Compare at $2,097
Save 73.3%IGI | 3.56ct | Oval | G | VS1 | Very Good
From $561
Compare at $2,100
Entry pricing in this benchmark range starts around $139.
What to Know When Shopping for 3.5 Carat Lab Grown Diamonds
- Always compare identical certified diamonds across retailers, because the same certificate can be listed at different prices by different stores. Across this whole category, asking prices span $38,610 from the cheapest to the most expensive listing.
- 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 $1,958 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.
Frequently Asked Questions
We currently track 24,738 comparable stones in the 3.50–3.99 carat benchmark range. Prices start around $139 and go up to $38,749.
Based on the latest market data, the average asking price is about $2,728 with a median around $1,958.
The observed spread is roughly $38,610 across tracked listings, which is about 99.6% from highest to lowest offer in the 3.50–3.99 carat benchmark range.
We refresh pricing data daily so these pages stay current with market changes.
Based on completed market data, the fair market benchmark is $2,728. The median price is $1,958, 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 19 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. Across this category, asking prices span $38,610 from the cheapest to the most expensive listing, and the same certified diamond can also carry different prices at different 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.
Tools and Guides
Tracking Lab Grown inventory for the 3.50–3.99 carat all-shape diamond benchmark.