3.8 Carat Round Lab Grown Diamond Prices Comparison
As of February 2026, 3.8 carat round lab grown diamonds usually range from $617 to $30,920, with an average price of $1,701.In the last month, prices for these diamonds are down 3.3%.Compare 1,538 verified listings across 13 retailers tracked by CaratRadar.
3.8 Carat Round Lab Grown Diamond Market Overview
CaratRadar currently tracks 1,538 verified 3.8-carat round lab grown diamonds listed across 13 online retailers. Prices in this segment range from $617 to $30,920, with an average asking price of $1,701 and a median of $1,049.
The price spread of $30,303 (98.0% 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.
1,538 diamonds tracked in this segment
Price range: $617 to $30,920
Average price: $1,701
Median price: $1,049
Available across 13 retailers
Savings potential: up to 98.0%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
1,538
$617
$1,701
$1,049
$30,920
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 62.5%3.75ct | Round | F | VS1 | Excellent
From $1,068
Compare at $2,850
IGISave 80.9%3.75ct | Round | E | VVS1 | Ideal
From $1,887
Compare at $9,900
IGISave 66.9%3.75ct | Round | D | VS1 | Ideal
From $1,265
Compare at $3,825
IGISave 82.2%3.75ct | Round | G | VS1 | Excellent
From $1,138
Compare at $6,390
IGISave 83.2%3.75ct | Round | H | VS2 | Ideal
From $846
Compare at $5,030
IGISave 73.4%3.75ct | Round | F | IF | Ideal
From $4,452
Compare at $16,720
IGISave 59.7%3.75ct | Round | G | VS1 | Ideal
From $1,149
Compare at $2,853
IGISave 86.8%3.75ct | Round | G | VS1 | Ideal
From $845
Compare at $6,420
IGISave 78.6%3.75ct | Round | F | VS1 | Ideal
From $1,579
Compare at $7,380
IGISave 81%3.75ct | Round | F | VS2 | Ideal
From $734
Compare at $3,870
IGISave 78.4%3.75ct | Round | F | VVS1 | Ideal
From $2,147
Compare at $9,960
IGISave 80.4%3.75ct | Round | G | VS2 | Ideal
From $722
Compare at $3,690
IGISave 81.6%3.75ct | Round | G | VS1 | Ideal
From $686
Compare at $3,730
IGISave 81.3%3.75ct | Round | G | VS2 | Ideal
From $680
Compare at $3,640
IGISave 74%3.75ct | Round | G | VS1 | Ideal
From $969
Compare at $3,730
IGISave 81.6%3.75ct | Round | G | VS1 | Ideal
From $686
Compare at $3,730
IGISave 84.8%3.75ct | Round | E | VS1 | Ideal
From $1,299
Compare at $8,530
IGISave 80.7%3.75ct | Round | G | VS1 | Ideal
From $728
Compare at $3,780
IGISave 67.8%3.75ct | Round | F | SI1 | Ideal
From $1,647
Compare at $5,110
IGISave 81.7%3.75ct | Round | G | VS1 | Ideal
From $698
Compare at $3,820
IGISave 34.2%3.75ct | Round | E | IF | Ideal
From $10,647
Compare at $16,170
IGISave 78.6%3.75ct | Round | D | VS1 | Excellent
From $1,928
Compare at $9,030
IGISave 15.9%3.75ct | Round | D | VS1 | Excellent
From $1,647
Compare at $1,959
IGISave 81.9%3.75ct | Round | D | VS1 | Ideal
From $1,808
Compare at $9,970
IGISave 84.3%3.75ct | Round | D | VVS1 | Ideal
From $2,158
Compare at $13,730
IGISave 77.4%3.75ct | Round | E | VVS2 | Ideal
From $1,898
Compare at $8,410
IGISave 88.3%3.75ct | Round | F | VVS2 | Ideal
From $978
Compare at $8,350
IGISave 84.2%3.75ct | Round | D | VVS1 | Ideal
From $2,170
Compare at $13,730
IGISave 86.1%3.75ct | Round | E | VVS2 | Ideal
From $1,295
Compare at $9,350
IGISave 76.7%3.75ct | Round | H | VS1 | Ideal
From $883
Compare at $3,790
IGISave 70.9%3.75ct | Round | E | VS1 | Excellent
From $906
Compare at $3,110
IGISave 69.8%3.75ct | Round | F | VS1 | Excellent
From $895
Compare at $2,960
GIASave 41.8%3.75ct | Round | F | VS2 | Ideal
From $3,750
Compare at $6,440
GIASave 81.2%3.75ct | Round | E | VVS2 | Excellent
From $2,017
Compare at $10,750
3.75ct | Round | D | VS2 | Excellent
From $6,050
Compare at $7,688
GIASave 74.8%3.75ct | Round | D | VVS2 | Excellent
From $2,760
Compare at $10,960
IGISave 83.4%3.75ct | Round | G | VS2 | Ideal
From $894
Compare at $5,390
IGISave 86.7%3.75ct | Round | G | VS1 | Excellent
From $849
Compare at $6,390
IGISave 83.9%3.75ct | Round | G | VS1 | Ideal
From $894
Compare at $5,570
IGISave 82.8%3.75ct | Round | H | VS1 | Ideal
From $920
Compare at $5,360
IGISave 63.3%3.75ct | Round | H | SI1 | Ideal
From $1,322
Compare at $3,600
IGISave 81.4%3.75ct | Round | G | VS2 | Excellent
From $837
Compare at $4,510
IGISave 80.7%3.75ct | Round | G | VS1 | Ideal
From $728
Compare at $3,780
IGISave 82.7%3.75ct | Round | G | VS2 | Ideal
From $674
Compare at $3,890
IGISave 82.8%3.75ct | Round | F | SI1 | Ideal
From $941
Compare at $5,470
IGISave 74%3.75ct | Round | G | VS1 | Ideal
From $969
Compare at $3,730
IGISave 81.6%3.75ct | Round | G | VS1 | Ideal
From $686
Compare at $3,730
IGISave 81.3%3.75ct | Round | G | VS2 | Ideal
From $680
Compare at $3,640
IGISave 77.9%3.75ct | Round | E | VVS2 | Ideal
From $2,072
Compare at $9,380
IGISave 82.5%3.75ct | Round | E | SI1 | Ideal
From $656
Compare at $3,740
Entry pricing in this category starts around $617.
What to Know When Shopping for 3.8 Carat Round Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $30,303 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 $1,049 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 1,538 comparable stones in this segment. Prices start around $617 and go up to $30,920.
Based on the latest market data, the average asking price is about $1,701 with a median around $1,049.
The observed spread is roughly $30,303 across tracked listings, which is about 98.0% 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 $1,049, 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 13 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 $30,303 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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