3.9 Carat Round Natural Diamond Prices Comparison
As of April 2026, 3.9 carat round natural diamonds usually range from $2,654 to $222,953, with an average price of $61,834.In the last month, prices for these diamonds are down 0.8%.Compare 29 verified listings across 3 retailers tracked by CaratRadar.
3.9 Carat Round Natural Diamond Market Overview
CaratRadar currently tracks 29 verified 3.9-carat round natural diamonds listed across 3 online retailers. Prices in this segment range from $2,654 to $222,953, with an average asking price of $61,834 and a median of $55,277.
The price spread of $220,299 (98.8% 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.
29 diamonds tracked in this segment
Price range: $2,654 to $222,953
Average price: $61,834
Median price: $55,277
Available across 3 retailers
Savings potential: up to 98.8%
Price Range Overview
As of Apr 14, 2026Real market range for this carat, shape, and diamond type.
29
$2,654
$61,834
$55,277
$222,953
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 21.4%GIA | 3.9ct | Round | F | VS2 | Excellent
From $95,454
Compare at $121,417
Save 12.1%GIA | 3.9ct | Round | J | VVS2 | Excellent
From $61,776
Compare at $70,296
Save 16.1%GIA | 3.9ct | Round | I | VS1 | Excellent
From $49,745
Compare at $59,306
Save 37.1%GIA | 3.9ct | Round | K | SI1 | Ideal
From $25,746
Compare at $40,941
GIA | 3.9ct | Round | E | SI2 | Excellent
From $69,221
Compare at $83,554
GIA | 3.9ct | Round | F | IF | Excellent
From $130,553
Compare at $134,349
GIA | 3.9ct | Round | D | SI1 | Excellent
From $85,784
Compare at $103,531
GIA | 3.9ct | Round | K | SI2 | Excellent
From $36,922
Compare at $43,086
IGI | 3.9ct | Round | H | VS1 | Very Good
From $46,933
Compare at $46,935
Save 15.8%IGI | 3.9ct | Round | J | VVS1 | Excellent
From $31,685
Compare at $37,650
GIA | 3.91ct | Round | G | SI1 | Excellent
From $69,993
Compare at $84,485
Save 31.9%GIA | 3.91ct | Round | D | SI2 | Excellent
From $53,052
Compare at $77,859
Save 16.7%GIA | 3.91ct | Round | G | SI2 | Excellent
From $55,706
Compare at $66,868
GIA | 3.91ct | Round | I | VS2 | Excellent
From $58,650
Compare at $69,540
Save 22%GIA | 3.92ct | Round | J | SI2 | Excellent
From $39,248
Compare at $50,328
GIA | 3.92ct | Round | H | SI2 | Excellent
From $51,227
Compare at $60,246
GIA | 3.93ct | Round | D | IF | Excellent
From $360,324
Compare at $389,323
Save 37%GIA | 3.93ct | Round | I | SI1 | Ideal
From $55,876
Compare at $88,692
GIA | 3.94ct | Round | K | SI1 | Excellent
From $44,559
Compare at $51,984
IGI | 3.95ct | Round | H | VS2 | Excellent
From $41,651
Compare at $45,945
Save 16.1%GIA | 3.96ct | Round | D | SI2 | Excellent
From $68,320
Compare at $81,413
IGI | 3.96ct | Round | H | VS2 | Excellent
From $50,793
Compare at $56,059
GIA | 3.98ct | Round | E | SI2 | Excellent
From $72,202
Compare at $74,020
GIA | 3.98ct | Round | I | SI1 | Excellent
From $53,491
Compare at $63,430
Save 21.2%GIA | 3.99ct | Round | J | SI2 | Excellent
From $50,198
Compare at $63,702
Save 16.8%GIA | 3.99ct | Round | E | SI2 | Excellent
From $70,690
Compare at $85,015
GIA | 3.99ct | Round | I | VVS1 | Very Good
From $92,019
Compare at $94,714
Save 17.4%GIA | 3.99ct | Round | E | VVS1 | Very Good
From $114,351
Compare at $138,494
GIA | 3.99ct | Round | H | VS1 | Ideal
From $71,819
Compare at $75,773
Entry pricing in this category starts around $2,654.
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 $220,299 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 $55,277 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 29 comparable stones in this segment. Prices start around $2,654 and go up to $222,953.
Based on the latest market data, the average asking price is about $61,834 with a median around $55,277.
The observed spread is roughly $220,299 across tracked listings, which is about 98.8% 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 $55,277, 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 3 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 $220,299 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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