3.9 Carat Round Lab Grown Diamond Prices Comparison
As of April 2026, 3.9 carat round lab grown diamonds usually range from $625 to $22,349, with an average price of $3,143.In the last month, prices for these diamonds are down 1%.Compare 1,039 verified listings across 9 retailers tracked by CaratRadar.
3.9 Carat Round Lab Grown Diamond Market Overview
CaratRadar currently tracks 1,039 verified 3.9-carat round lab grown diamonds listed across 9 online retailers. Prices in this segment range from $625 to $22,349, with an average asking price of $3,143 and a median of $2,391.
The price spread of $21,724 (97.2% 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.
1,039 diamonds tracked in this segment
Price range: $625 to $22,349
Average price: $3,143
Median price: $2,391
Available across 9 retailers
Savings potential: up to 97.2%
Price Range Overview
As of Apr 13, 2026Real market range for this carat, shape, and diamond type.
1,039
$625
$3,143
$2,391
$22,349
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 78.4%GCAL | 3.9ct | Round | E | VVS2 | Ideal
From $1,825
Compare at $8,440
Save 77.7%GCAL | 3.9ct | Round | G | VVS2 | Excellent
From $1,556
Compare at $6,970
Save 63.9%GIA | 3.9ct | Round | D | VVS1 | Excellent
From $5,028
Compare at $13,938
Save 78.7%GIA | 3.9ct | Round | F | VS2 | Excellent
From $2,148
Compare at $10,070
Save 60.9%GIA | 3.9ct | Round | D | VVS1 | Excellent
From $5,454
Compare at $13,938
Save 47.3%GIA | 3.9ct | Round | D | VVS2 | Excellent
From $4,124
Compare at $7,830
Save 72.4%GIA | 3.9ct | Round | D | VS2 | Excellent
From $2,486
Compare at $9,020
Save 73.8%GIA | 3.9ct | Round | D | IF | Excellent
From $13,040
Compare at $49,740
Save 47%GIA | 3.9ct | Round | D | VVS1 | Excellent
From $7,890
Compare at $14,890
Save 64.9%GIA | 3.9ct | Round | D | VVS1 | Excellent
From $5,028
Compare at $14,330
Save 66%IGI | 3.9ct | Round | I | VS1 | Ideal
From $1,797
Compare at $5,280
Save 76.7%IGI | 3.9ct | Round | F | VS1 | Ideal
From $1,842
Compare at $7,910
Save 75.4%IGI | 3.9ct | Round | G | VS2 | Ideal
From $1,033
Compare at $4,200
Save 49.4%IGI | 3.9ct | Round | E | VVS2 | Excellent
From $1,210
Compare at $2,393
Save 75.3%IGI | 3.9ct | Round | F | VS2 | Ideal
From $1,085
Compare at $4,390
Save 73.4%IGI | 3.9ct | Round | G | VS1 | Ideal
From $954
Compare at $3,590
Save 73.4%IGI | 3.9ct | Round | G | VS1 | Ideal
From $954
Compare at $3,590
Save 73.5%IGI | 3.9ct | Round | F | SI1 | Ideal
From $900
Compare at $3,400
Save 50.3%IGI | 3.9ct | Round | H | VS1 | Ideal
From $1,775
Compare at $3,570
Save 47%IGI | 3.9ct | Round | H | VS1 | Ideal
From $1,775
Compare at $3,350
Save 73.5%IGI | 3.9ct | Round | F | SI1 | Ideal
From $914
Compare at $3,450
Save 73.4%IGI | 3.9ct | Round | G | VS1 | Ideal
From $967
Compare at $3,640
Save 73.4%IGI | 3.9ct | Round | G | VS1 | Ideal
From $954
Compare at $3,590
Save 72.9%IGI | 3.9ct | Round | F | VVS2 | Ideal
From $2,152
Compare at $7,940
Save 73.4%IGI | 3.9ct | Round | G | VS2 | Ideal
From $927
Compare at $3,490
Save 77.8%IGI | 3.9ct | Round | E | VVS2 | Excellent
From $1,955
Compare at $8,810
Save 76.7%IGI | 3.9ct | Round | E | VS2 | Ideal
From $1,047
Compare at $4,490
Save 73.7%IGI | 3.9ct | Round | H | VS1 | Ideal
From $930
Compare at $3,540
Save 73.3%IGI | 3.9ct | Round | F | VS2 | Ideal
From $1,020
Compare at $3,820
Save 73.4%IGI | 3.9ct | Round | G | VS1 | Ideal
From $967
Compare at $3,640
Save 73.4%IGI | 3.9ct | Round | G | VS1 | Ideal
From $967
Compare at $3,640
Save 75.8%IGI | 3.9ct | Round | G | VS1 | Excellent
From $1,613
Compare at $6,670
Save 73.4%IGI | 3.9ct | Round | G | VS1 | Ideal
From $967
Compare at $3,640
Save 73.3%IGI | 3.9ct | Round | F | VS2 | Ideal
From $1,034
Compare at $3,870
Save 76.5%IGI | 3.9ct | Round | E | VS2 | Ideal
From $1,057
Compare at $4,490
IGI | 3.9ct | Round | E | VS1 | Ideal
From $8,870
Save 73.4%IGI | 3.9ct | Round | E | SI1 | Ideal
From $967
Compare at $3,640
Save 75.8%IGI | 3.9ct | Round | E | VS2 | Excellent
From $1,771
Compare at $7,320
Save 84.8%IGI | 3.9ct | Round | F | VVS2 | Ideal
From $1,327
Compare at $8,700
Save 24.1%IGI | 3.9ct | Round | F | SI1 | Ideal
From $905
Compare at $1,193
Save 75.9%IGI | 3.9ct | Round | D | IF | Ideal
From $5,390
Compare at $22,350
Save 78.4%IGI | 3.9ct | Round | E | VS2 | Excellent
From $1,158
Compare at $5,370
Save 78.4%IGI | 3.9ct | Round | E | VVS2 | Ideal
From $1,727
Compare at $8,000
Save 77.6%IGI | 3.9ct | Round | E | VS2 | Excellent
From $1,074
Compare at $4,790
Save 73.2%IGI | 3.9ct | Round | F | VS2 | Ideal
From $1,074
Compare at $4,010
Save 76.1%IGI | 3.9ct | Round | E | VS2 | Ideal
From $1,074
Compare at $4,490
Save 74.5%IGI | 3.9ct | Round | E | VS2 | Ideal
From $1,035
Compare at $4,060
Save 73.3%IGI | 3.9ct | Round | F | VS2 | Ideal
From $1,060
Compare at $3,970
Save 73.2%IGI | 3.9ct | Round | F | VS2 | Ideal
From $1,074
Compare at $4,010
Save 77.6%IGI | 3.9ct | Round | E | VS2 | Ideal
From $1,074
Compare at $4,790
Entry pricing in this category starts around $625.
What to Know When Shopping for 3.9 Carat Round Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $21,724 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 $2,391 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 1,039 comparable stones in this segment. Prices start around $625 and go up to $22,349.
Based on the latest market data, the average asking price is about $3,143 with a median around $2,391.
The observed spread is roughly $21,724 across tracked listings, which is about 97.2% 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 $2,391, 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 9 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 $21,724 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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