3.9 Carat Round Natural Diamond Prices Comparison
As of May 2026, 3.9 carat round natural diamonds usually range from $3,920 to $207,641, with an average price of $62,023.In the last month, prices for these diamonds are up 0.8%.Compare 38 verified listings across 8 retailers tracked by CaratRadar.
3.9 Carat Round Natural Diamond Market Overview
CaratRadar currently tracks 38 verified 3.9-carat round natural diamonds listed across 8 online retailers. Prices in this segment range from $3,920 to $207,641, with an average asking price of $62,023 and a median of $55,928.
The price spread of $203,721 (98.1% 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.
38 diamonds tracked in this segment
Price range: $3,920 to $207,641
Average price: $62,023
Median price: $55,928
Available across 8 retailers
Savings potential: up to 98.1%
Price Range Overview
As of May 29, 2026Real market range for this carat, shape, and diamond type.
38
$3,920
$62,023
$55,928
$207,641
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 15.9%IGI | 3.9ct | Round | K | VS2 | Excellent
From $23,050
Compare at $27,410
Save 20.3%GIA | 3.9ct | Round | K | SI2 | Excellent
From $34,319
Compare at $43,087
Save 15%IGI | 3.98ct | Round | J | IF | Excellent
From $36,440
Compare at $42,880
Save 23.4%GIA | 3.92ct | Round | J | SI2 | Excellent
From $38,555
Compare at $50,328
Save 20.6%GIA | 3.94ct | Round | K | SI1 | Excellent
From $41,297
Compare at $51,984
Save 11.5%IGI | 3.95ct | Round | H | VS2 | Excellent
From $41,655
Compare at $47,083
Save 24.6%GIA | 3.95ct | Round | I | SI2 | Ideal
From $42,711
Compare at $56,664
GIA | 3.9ct | Round | H | SI2 | Excellent
From $46,020
Compare at $46,570
Save 34.1%GIA | 3.97ct | Round | J | SI1 | Excellent
From $46,109
Compare at $69,959
Save 23.6%GIA | 3.9ct | Round | I | SI2 | Ideal
From $46,814
Compare at $61,269
Save 20.3%GIA | 3.92ct | Round | H | SI2 | Excellent
From $48,009
Compare at $60,246
Save 20.3%GIA | 3.98ct | Round | I | SI1 | Excellent
From $50,549
Compare at $63,430
Save 32.9%GIA | 3.91ct | Round | D | SI2 | Excellent
From $51,976
Compare at $77,486
Save 28.2%GIA | 3.99ct | Round | J | SI2 | Excellent
From $53,722
Compare at $74,778
Save 21.2%GIA | 3.91ct | Round | I | VS2 | Excellent
From $54,765
Compare at $69,540
Save 32.9%GIA | 3.91ct | Round | G | SI2 | Excellent
From $55,685
Compare at $82,983
Save 18.2%GIA | 3.9ct | Round | J | VVS2 | Excellent
From $56,891
Compare at $69,516
Save 10.1%GIA | 3.9ct | Round | I | VS1 | Excellent
From $60,805
Compare at $67,652
Save 17.6%GIA | 3.98ct | Round | E | SI2 | Excellent
From $60,986
Compare at $74,020
Save 21%GIA | 3.9ct | Round | E | SI2 | Excellent
From $66,026
Compare at $83,554
Save 21%GIA | 3.91ct | Round | G | SI1 | Excellent
From $66,762
Compare at $84,486
Save 34.7%GIA | 3.99ct | Round | E | SI2 | Excellent
From $69,358
Compare at $106,271
Save 22.9%GIA | 3.99ct | Round | E | VS2 | Very Good
From $71,135
Compare at $92,271
Save 13.9%GIA | 3.97ct | Round | G | VS1 | Excellent
From $71,588
Compare at $83,101
Save 13.9%GIA | 3.98ct | Round | H | VVS2 | Excellent
From $72,088
Compare at $83,682
Save 22.9%GIA | 3.99ct | Round | I | VVS1 | Very Good
From $72,993
Compare at $94,715
GIA | 3.9ct | Round | D | VVS1 | Excellent
From $74,448
Compare at $80,557
Save 18.5%GIA | 3.9ct | Round | D | VS2 | Ideal
From $74,675
Compare at $91,625
Save 21%GIA | 3.9ct | Round | D | SI1 | Excellent
From $81,825
Compare at $103,531
Save 18.6%GIA | 3.9ct | Round | D | SI2 | Excellent
From $83,044
Compare at $102,029
Save 23.2%GIA | 3.9ct | Round | F | VS2 | Excellent
From $93,295
Compare at $121,417
GIA | 3.9ct | Round | E | VS1 | Excellent
From $97,987
Compare at $99,931
Save 31.4%GIA | 3.9ct | Round | F | VVS2 | Excellent
From $104,609
Compare at $152,396
Save 26.6%GIA | 3.93ct | Round | I | VVS1 | Excellent
From $107,531
Compare at $146,493
Save 35%GIA | 3.99ct | Round | E | VVS1 | Very Good
From $117,110
Compare at $180,040
Save 33.4%GIA | 3.9ct | Round | F | IF | Excellent
From $128,467
Compare at $192,973
Save 28.3%GIA | 3.93ct | Round | D | FL | Excellent
From $197,503
Compare at $275,289
Save 28.1%GIA | 3.93ct | Round | D | IF | Excellent
From $360,324
Compare at $501,374
Entry pricing in this category starts around $3,920.
What to Know When Shopping for 3.9 Carat Round Natural Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $203,721 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 $55,928 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.
- 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 38 comparable stones in this segment. Prices start around $3,920 and go up to $207,641.
Based on the latest market data, the average asking price is about $62,023 with a median around $55,928.
The observed spread is roughly $203,721 across tracked listings, which is about 98.1% 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 $62,023. The median price is $55,928, 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 $203,721 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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