3.9 Carat Round Natural Diamond Prices Comparison
As of July 2026, 3.9 carat round natural diamonds usually range from $4,467 to $206,196, with an average price of $61,542.In the last month, prices for these diamonds are down 0.7%.Compare 35 verified listings across 6 retailers tracked by CaratRadar.
3.9 Carat Round Natural Diamond Market Overview
CaratRadar currently tracks 35 verified 3.9-carat round natural diamonds listed across 6 online retailers. Prices in this segment range from $4,467 to $206,196, with an average asking price of $61,542 and a median of $55,447.
The price spread of $201,729 (97.8% 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.
35 diamonds tracked in this segment
Price range: $4,467 to $206,196
Average price: $61,542
Median price: $55,447
Available across 6 retailers
Savings potential: up to 97.8%
Price Range Overview
As of Jul 10, 2026Real market range for this carat, shape, and diamond type.
35
$4,467
$61,542
$55,447
$206,196
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
IGI | 3.91ct | Round | G | SI2 | Ideal
From $29,561
Compare at $30,392
GIA | 3.9ct | Round | K | SI2 | Excellent
From $34,319
Compare at $36,922
Save 15.1%IGI | 3.98ct | Round | J | IF | Excellent
From $35,574
Compare at $41,880
Save 11.6%GIA | 3.92ct | Round | J | SI2 | Excellent
From $38,116
Compare at $43,138
GIA | 3.94ct | Round | K | SI1 | Excellent
From $41,297
Compare at $44,559
GIA | 3.95ct | Round | I | SI2 | Ideal
From $42,618
Compare at $45,151
GIA | 3.9ct | Round | H | SI2 | Excellent
From $45,430
Compare at $45,973
GIA | 3.97ct | Round | J | SI1 | Excellent
From $46,109
Compare at $48,081
GIA | 3.92ct | Round | H | SI2 | Excellent
From $48,009
Compare at $51,227
Save 32.9%GIA | 3.99ct | Round | J | SI2 | Excellent
From $50,198
Compare at $74,778
GIA | 3.98ct | Round | I | SI1 | Excellent
From $50,549
Compare at $53,491
IGI | 3.96ct | Round | H | VS2 | Excellent
From $50,793
Compare at $50,795
Save 31.5%GIA | 3.91ct | Round | D | SI2 | Excellent
From $53,052
Compare at $77,486
GIA | 3.91ct | Round | I | VS2 | Excellent
From $54,765
Compare at $55,424
Save 36.2%GIA | 3.93ct | Round | I | SI1 | Ideal
From $54,801
Compare at $85,831
Save 32.9%GIA | 3.91ct | Round | G | SI2 | Excellent
From $55,685
Compare at $82,983
GIA | 3.9ct | Round | J | VVS2 | Excellent
From $56,891
Compare at $61,092
Save 10.1%GIA | 3.9ct | Round | I | VS1 | Excellent
From $60,802
Compare at $67,652
GIA | 3.9ct | Round | E | SI2 | Excellent
From $66,026
Compare at $69,221
GIA | 3.98ct | Round | E | SI2 | Excellent
From $66,465
Compare at $71,356
GIA | 3.91ct | Round | G | SI1 | Excellent
From $66,762
Compare at $69,993
Save 26.7%GIA | 3.9ct | Round | D | VVS1 | Excellent
From $67,882
Compare at $92,635
GIA | 3.99ct | Round | E | VS2 | Very Good
From $69,097
Compare at $70,800
Save 34.7%GIA | 3.99ct | Round | E | SI2 | Excellent
From $69,358
Compare at $106,271
Save 10.1%GIA | 3.93ct | Round | D | SI1 | Excellent
From $71,580
Compare at $79,644
GIA | 3.9ct | Round | D | VS2 | Ideal
From $74,675
Compare at $80,309
GIA | 3.9ct | Round | D | SI1 | Excellent
From $81,825
Compare at $85,784
GIA | 3.9ct | Round | D | SI2 | Excellent
From $83,044
Compare at $85,307
GIA | 3.9ct | Round | G | VVS2 | Ideal
From $86,396
Compare at $88,085
GIA | 3.9ct | Round | F | VS2 | Excellent
From $93,295
Compare at $100,614
Save 31.6%GIA | 3.9ct | Round | F | VVS2 | Excellent
From $101,832
Compare at $148,803
GIA | 3.91ct | Round | F | VVS2 | Ideal
From $109,551
Compare at $120,700
Save 35%GIA | 3.99ct | Round | E | VVS1 | Very Good
From $109,935
Compare at $169,024
Save 31.7%GIA | 3.9ct | Round | F | IF | Excellent
From $127,826
Compare at $187,124
Save 28.1%GIA | 3.93ct | Round | D | IF | Excellent
From $360,324
Compare at $501,374
Entry pricing in this category starts around $4,467.
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 $201,729 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 $55,447 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 35 comparable stones in this segment. Prices start around $4,467 and go up to $206,196.
Based on the latest market data, the average asking price is about $61,542 with a median around $55,447.
The observed spread is roughly $201,729 across tracked listings, which is about 97.8% 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 $61,542. The median price is $55,447, 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 6 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 $201,729 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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