4.2 Carat Round Natural Diamond Prices Comparison
As of May 2026, 4.2 carat round natural diamonds usually range from $4,278 to $271,986, with an average price of $77,102.In the last month, prices for these diamonds are up 2.7%.Compare 50 verified listings across 9 retailers tracked by CaratRadar.
4.2 Carat Round Natural Diamond Market Overview
CaratRadar currently tracks 50 verified 4.2-carat round natural diamonds listed across 9 online retailers. Prices in this segment range from $4,278 to $271,986, with an average asking price of $77,102 and a median of $69,984.
The price spread of $267,708 (98.4% 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.
50 diamonds tracked in this segment
Price range: $4,278 to $271,986
Average price: $77,102
Median price: $69,984
Available across 9 retailers
Savings potential: up to 98.4%
Price Range Overview
As of May 29, 2026Real market range for this carat, shape, and diamond type.
50
$4,278
$77,102
$69,984
$271,986
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
GIA | 4.23ct | Round | L | SI1 | Ideal
From $27,648
Compare at $29,321
Save 15.4%GIA | 4.21ct | Round | L | SI1 | Excellent
From $28,254
Compare at $33,415
GIA | 4.26ct | Round | I | SI2 | Excellent
From $29,631
Compare at $31,276
Save 35.7%GIA | 4.25ct | Round | K | SI1 | Excellent
From $29,945
Compare at $46,591
Save 33.7%GIA | 4.21ct | Round | J | SI1 | Excellent
From $39,479
Compare at $59,515
IGI | 4.27ct | Round | J | VVS2 | Excellent
From $40,245
Compare at $43,251
Save 25.3%GIA | 4.22ct | Round | J | SI1 | Excellent
From $42,080
Compare at $56,304
Save 12.9%GIA | 4.24ct | Round | J | SI2 | Excellent
From $44,130
Compare at $50,694
Save 19.2%GIA | 4.27ct | Round | K | SI2 | Very Good
From $44,599
Compare at $55,169
Save 14.6%GIA | 4.25ct | Round | J | SI1 | Excellent
From $46,969
Compare at $54,967
GIA | 4.23ct | Round | J | VVS1 | Ideal
From $50,597
Compare at $54,741
Save 12.8%GIA | 4.23ct | Round | I | SI1 | Ideal
From $52,810
Compare at $60,565
GIA | 4.25ct | Round | I | VVS2 | Excellent
From $52,914
Compare at $53,035
Save 41.9%GIA | 4.26ct | Round | J | VS2 | Excellent
From $53,070
Compare at $91,374
Save 14.5%GIA | 4.27ct | Round | I | SI1 | Ideal
From $55,980
Compare at $65,500
GIA | 4.21ct | Round | E | SI2 | Excellent
From $58,345
Compare at $62,051
Save 13.9%GIA | 4.28ct | Round | I | VS2 | Ideal
From $62,017
Compare at $72,001
Save 16.1%GIA | 4.24ct | Round | J | VS2 | Excellent
From $64,615
Compare at $76,985
Save 13.9%GIA | 4.29ct | Round | I | VS1 | Excellent
From $65,813
Compare at $76,404
Save 13.9%GIA | 4.21ct | Round | I | VS1 | Excellent
From $66,813
Compare at $77,564
GIA | 4.25ct | Round | E | SI2 | Excellent
From $67,431
Compare at $72,499
Save 34.1%GIA | 4.23ct | Round | H | VS1 | Excellent
From $70,004
Compare at $106,198
GIA | 4.23ct | Round | J | IF | Excellent
From $70,249
Compare at $77,509
Save 21.4%GIA | 4.29ct | Round | H | VS1 | Excellent
From $70,525
Compare at $89,693
Save 32.9%GIA | 4.25ct | Round | H | VS1 | Excellent
From $71,330
Compare at $106,255
Save 13.9%GIA | 4.24ct | Round | H | VS2 | Excellent
From $73,531
Compare at $85,355
GIA | 4.22ct | Round | I | VVS2 | Excellent
From $77,063
Compare at $78,676
Save 27.5%GIA | 4.22ct | Round | G | VVS2 | Excellent
From $77,888
Compare at $107,485
Save 23%GIA | 4.23ct | Round | H | VS2 | Ideal
From $80,326
Compare at $104,359
Save 19.2%GIA | 4.21ct | Round | E | VS1 | Excellent
From $83,460
Compare at $103,300
GIA | 4.23ct | Round | H | VS1 | Excellent
From $84,032
Compare at $90,851
GIA | 4.23ct | Round | G | VS1 | Excellent
From $95,688
Compare at $102,892
GIA | 4.21ct | Round | G | VVS2 | Ideal
From $96,410
Compare at $100,635
GIA | 4.21ct | Round | G | IF | Excellent
From $99,379
Compare at $101,996
Save 36.5%GIA | 4.29ct | Round | H | VS1 | Excellent
From $99,742
Compare at $157,055
Save 13.8%GIA | 4.26ct | Round | F | VS1 | Ideal
From $100,429
Compare at $116,554
Save 13.8%GIA | 4.23ct | Round | E | VS1 | Excellent
From $100,696
Compare at $116,863
Save 32.3%GIA | 4.25ct | Round | G | VVS1 | Excellent
From $100,940
Compare at $149,197
GIA | 4.26ct | Round | G | VS1 | Excellent
From $102,291
Compare at $118,713
Save 36.6%GIA | 4.25ct | Round | F | VS2 | Excellent
From $105,762
Compare at $166,717
Save 36.6%GIA | 4.28ct | Round | H | VVS1 | Excellent
From $108,255
Compare at $170,622
Save 37.3%GIA | 4.27ct | Round | G | VVS2 | Excellent
From $111,457
Compare at $177,773
Save 26.6%GIA | 4.21ct | Round | D | VVS2 | Excellent
From $111,762
Compare at $152,250
Save 26.6%GIA | 4.29ct | Round | D | SI1 | Excellent
From $111,824
Compare at $152,335
Save 26.6%GIA | 4.28ct | Round | F | IF | Excellent
From $112,963
Compare at $153,883
Save 26.6%GIA | 4.21ct | Round | D | VVS2 | Excellent
From $128,187
Compare at $174,600
Save 32.7%GIA | 4.25ct | Round | D | VVS1 | Excellent
From $128,410
Compare at $190,724
Save 20.8%GIA | 4.26ct | Round | D | VVS2 | Excellent
From $178,659
Compare at $225,618
Save 37.3%GIA | 4.28ct | Round | E | VVS1 | Excellent
From $185,156
Compare at $295,168
Save 32.7%GIA | 4.26ct | Round | D | VVS2 | Excellent
From $220,870
Compare at $328,061
Entry pricing in this category starts around $4,278.
What to Know When Shopping for 4.2 Carat Round Natural Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $267,708 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 $69,984 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 50 comparable stones in this segment. Prices start around $4,278 and go up to $271,986.
Based on the latest market data, the average asking price is about $77,102 with a median around $69,984.
The observed spread is roughly $267,708 across tracked listings, which is about 98.4% 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 $77,102. The median price is $69,984, 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 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 $267,708 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 4.2 carat Round diamonds.