3.9 Carat Round Natural Diamond Prices Comparison
As of February 2026, 3.9 carat round natural diamonds usually range from $842 to $360,324, with an average price of $29,458.In the last month, prices for these diamonds are down 13.2%.Compare 67 verified listings across 6 retailers tracked by CaratRadar.
3.9 Carat Round Natural Diamond Market Overview
CaratRadar currently tracks 67 verified 3.9-carat round natural diamonds listed across 6 online retailers. Prices in this segment range from $842 to $360,324, with an average asking price of $29,458 and a median of $1,465.
The price spread of $359,482 (99.8% 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.
67 diamonds tracked in this segment
Price range: $842 to $360,324
Average price: $29,458
Median price: $1,465
Available across 6 retailers
Savings potential: up to 99.8%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
67
$842
$29,458
$1,465
$360,324
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
GIASave 13.8%3.86ct | Round | F | VS1 | Excellent
From $92,975
Compare at $107,908
GIASave 11.3%3.86ct | Round | F | SI1 | Excellent
From $82,280
Compare at $92,746
IGISave 70%3.86ct | Round | F | VS1 | Ideal
From $914
Compare at $3,045
IGISave 75.5%3.86ct | Round | F | VVS2 | Excellent
From $926
Compare at $3,780
GIASave 22%3.86ct | Round | I | SI1 | Excellent
From $48,587
Compare at $62,288
IGISave 71.1%3.87ct | Round | E | VS1 | Excellent
From $927
Compare at $3,210
3.87ct | Round | K | VS1 | Excellent
From $38,453
Compare at $47,597
IGISave 71.2%3.88ct | Round | E | VS1 | Excellent
From $928
Compare at $3,220
IGISave 71.6%3.88ct | Round | D | VS1 | Ideal
From $1,124
Compare at $3,955
IGISave 68.2%3.88ct | Round | F | VS2 | Excellent
From $899
Compare at $2,830
IGISave 68.9%3.88ct | Round | F | VS1 | Excellent
From $917
Compare at $2,945
IGISave 68.2%3.88ct | Round | F | VS2 | Excellent
From $899
Compare at $2,830
IGISave 63.1%3.88ct | Round | G | VS1 | Excellent
From $842
Compare at $2,281
IGISave 68.9%3.88ct | Round | F | VS1 | Excellent
From $917
Compare at $2,945
GIA3.89ct | Round | G | VS2 | Excellent
From $90,508
Compare at $95,331
GIA3.89ct | Round | J | VS2 | Excellent
From $48,521
Compare at $53,769
IGISave 69.9%3.9ct | Round | E | VS2 | Excellent
From $916
Compare at $3,040
IGISave 71.2%3.9ct | Round | E | VS1 | Excellent
From $932
Compare at $3,235
GIASave 58%3.9ct | Round | I | SI2 | Ideal
From $44,710
Compare at $106,476
3.9ct | Round | K | SI2 | Excellent
From $36,922
Compare at $43,087
IGISave 71.2%3.9ct | Round | E | VS1 | Excellent
From $932
Compare at $3,235
GIASave 58%3.9ct | Round | F | VS1 | Ideal
From $60,268
Compare at $143,582
GIA3.9ct | Round | F | VVS2 | Excellent
From $115,558
Compare at $122,768
GIASave 10.8%3.9ct | Round | I | VS1 | Excellent
From $53,937
Compare at $60,489
GIASave 58%3.9ct | Round | G | VVS2 | Excellent
From $63,621
Compare at $151,579
3.9ct | Round | D | SI1 | Excellent
From $85,784
Compare at $103,531
GIASave 21.4%3.9ct | Round | F | VS2 | Excellent
From $95,454
Compare at $121,417
GIASave 12.1%3.9ct | Round | J | VVS2 | Excellent
From $61,776
Compare at $70,297
GIASave 66.1%3.9ct | Round | D | VVS1 | Excellent
From $2,687
Compare at $7,937
3.9ct | Round | E | SI2 | Excellent
From $69,221
Compare at $83,554
GIA3.9ct | Round | F | IF | Excellent
From $134,349
Compare at $138,409
GIASave 71.6%3.91ct | Round | D | VVS1 | Excellent
From $3,859
Compare at $13,600
IGISave 86.2%3.91ct | Round | E | VVS2 | Excellent
From $1,342
Compare at $9,700
3.91ct | Round | G | SI1 | Excellent
From $69,993
Compare at $84,486
IGISave 71%3.91ct | Round | E | VS2 | Ideal
From $918
Compare at $3,165
IGISave 71.2%3.91ct | Round | E | VS1 | Excellent
From $934
Compare at $3,245
3.91ct | Round | I | VS2 | Excellent
From $56,206
Compare at $69,540
IGISave 73.2%3.92ct | Round | D | VS2 | Excellent
From $1,017
Compare at $3,800
IGISave 68.9%3.92ct | Round | F | VS1 | Excellent
From $924
Compare at $2,975
IGISave 57.3%3.92ct | Round | FANCY | VVS2 | Ideal
From $1,465
Compare at $3,435
IGISave 75.6%3.92ct | Round | F | VVS2 | Excellent
From $936
Compare at $3,840
IGISave 69.5%3.92ct | Round | F | VS2 | Ideal
From $906
Compare at $2,975
IGISave 57.3%3.92ct | Round | FANCY | VVS2 | Ideal
From $1,465
Compare at $3,435
IGISave 70.5%3.92ct | Round | D | VS1 | Excellent
From $1,133
Compare at $3,840
GIASave 59.4%3.92ct | Round | D | IF | Excellent
From $5,324
Compare at $13,105
GIASave 22%3.92ct | Round | J | SI2 | Excellent
From $39,248
Compare at $50,328
3.92ct | Round | H | SI2 | Excellent
From $51,227
Compare at $60,246
IGISave 69.6%3.93ct | Round | F | VS2 | Ideal
From $908
Compare at $2,985
GIA3.93ct | Round | D | IF | Excellent
From $360,324
Compare at $389,324
GIASave 73.3%3.93ct | Round | D | IF | Excellent
From $5,699
Compare at $21,350
Entry pricing in this category starts around $842.
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 $359,482 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 $1,465 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 67 comparable stones in this segment. Prices start around $842 and go up to $360,324.
Based on the latest market data, the average asking price is about $29,458 with a median around $1,465.
The observed spread is roughly $359,482 across tracked listings, which is about 99.8% 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 $1,465, 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 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 $359,482 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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Tracking Natural inventory for 3.9 carat Round diamonds.