4.2 Carat Oval Lab Grown Diamond Prices Comparison
As of May 2026, 4.2 carat oval lab grown diamonds usually range from $640 to $51,386, with an average price of $5,752.In the last month, prices for these diamonds are down 6.7%.Compare 172 verified listings across 10 retailers tracked by CaratRadar.
4.2 Carat Oval Lab Grown Diamond Market Overview
CaratRadar currently tracks 172 verified 4.2-carat oval lab grown diamonds listed across 10 online retailers. Prices in this segment range from $640 to $51,386, with an average asking price of $5,752 and a median of $4,112.
The price spread of $50,746 (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.
172 diamonds tracked in this segment
Price range: $640 to $51,386
Average price: $5,752
Median price: $4,112
Available across 10 retailers
Savings potential: up to 98.8%
Price Range Overview
As of May 30, 2026Real market range for this carat, shape, and diamond type.
172
$640
$5,752
$4,112
$51,386
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 | 4.28ct | Oval | H | VS2 | Ideal
From $685
Compare at $3,240
Save 63.1%IGI | 4.21ct | Oval | F | VS1 | Very Good
From $778
Compare at $2,107
Save 72.7%IGI | 4.22ct | Oval | F | VS2 | Excellent
From $813
Compare at $2,981
Save 69.8%IGI | 4.22ct | Oval | F | VS1 | Very Good
From $834
Compare at $2,757
Save 78.4%IGI | 4.25ct | Oval | G | VS2 | Ideal
From $844
Compare at $3,910
Save 64.3%IGI | 4.24ct | Oval | E | VS1 | Very Good
From $844
Compare at $2,364
Save 57%IGI | 4.25ct | Oval | H | VVS2 | Ideal
From $860
Compare at $2,001
Save 64%IGI | 4.21ct | Oval | E | VS1 | Very Good
From $892
Compare at $2,481
Save 73.8%IGI | 4.24ct | Oval | E | VS1 | Ideal
From $897
Compare at $3,430
Save 60.4%IGI | 4.21ct | Oval | F | VVS2 | Ideal
From $902
Compare at $2,276
Save 56.1%IGI | 4.21ct | Oval | G | VS1 | Very Good
From $911
Compare at $2,073
Save 56.2%IGI | 4.23ct | Oval | G | VS1 | Very Good
From $915
Compare at $2,091
Save 64%IGI | 4.21ct | Oval | F | VVS2 | Excellent
From $929
Compare at $2,582
Save 64%IGI | 4.22ct | Oval | F | VVS2 | Very Good
From $931
Compare at $2,588
Save 56.7%IGI | 4.25ct | Oval | F | VS1 | Very Good
From $938
Compare at $2,168
Save 63.5%IGI | 4.26ct | Oval | E | VVS2 | Very Good
From $939
Compare at $2,576
Save 79.9%IGI | 4.27ct | Oval | H | VS1 | Ideal
From $942
Compare at $4,680
Save 64%IGI | 4.27ct | Oval | F | VVS2 | Excellent
From $942
Compare at $2,618
Save 64%IGI | 4.29ct | Oval | F | VVS2 | Excellent
From $946
Compare at $2,631
Save 79.9%IGI | 4.26ct | Oval | H | VS2 | Ideal
From $951
Compare at $4,730
Save 56.7%IGI | 4.25ct | Oval | F | VS2 | Very Good
From $963
Compare at $2,224
Save 59.3%IGI | 4.24ct | Oval | E | VS1 | Very Good
From $971
Compare at $2,383
Save 54%IGI | 4.27ct | Oval | G | VS2 | Ideal
From $985
Compare at $2,143
Save 64%IGI | 4.22ct | Oval | E | VVS2 | Excellent
From $986
Compare at $2,739
Save 64%IGI | 4.22ct | Oval | E | VVS2 | Excellent
From $986
Compare at $2,739
Save 64%IGI | 4.24ct | Oval | E | VVS2 | Very Good
From $990
Compare at $2,752
Save 64%IGI | 4.25ct | Oval | E | VVS2 | Very Good
From $993
Compare at $2,758
Save 64%IGI | 4.26ct | Oval | E | VVS2 | Very Good
From $994
Compare at $2,765
Save 64%IGI | 4.23ct | Oval | E | VVS2 | Excellent
From $1,006
Compare at $2,795
Save 64%IGI | 4.23ct | Oval | E | VVS2 | Very Good
From $1,006
Compare at $2,795
Save 78.4%IGI | 4.26ct | Oval | E | VVS2 | Ideal
From $1,013
Compare at $4,685
Save 64%IGI | 4.27ct | Oval | E | VVS2 | Excellent
From $1,015
Compare at $2,822
Save 59.6%IGI | 4.29ct | Oval | E | VVS2 | Very Good
From $1,040
Compare at $2,577
Save 40.9%IGI | 4.27ct | Oval | E | VVS2 | Very Good
From $1,062
Compare at $1,795
Save 14.2%IGI | 4.23ct | Oval | F | VS1 | Good
From $1,068
Compare at $1,245
Save 33.2%IGI | 4.25ct | Oval | E | VVS2 | Ideal
From $1,085
Compare at $1,625
Save 56.6%IGI | 4.21ct | Oval | E | VVS2 | Excellent
From $1,095
Compare at $2,524
Save 55.3%IGI | 4.26ct | Oval | E | VS1 | Very Good
From $1,096
Compare at $2,450
Save 54.7%IGI | 4.22ct | Oval | E | VS1 | Very Good
From $1,103
Compare at $2,436
Save 53.2%IGI | 4.28ct | Oval | F | VVS2 | Very Good
From $1,112
Compare at $2,376
Save 72.9%IGI | 4.24ct | Oval | FANCY | VS2 | Very Good
From $1,163
Compare at $4,286
Save 55.2%IGI | 4.27ct | Oval | E | VVS2 | Very Good
From $1,163
Compare at $2,596
Save 25.4%IGI | 4.27ct | Oval | E | VVS2 | Very Good
From $1,270
Compare at $1,703
Save 46.3%IGI | 4.22ct | Oval | D | VS1 | Very Good
From $1,278
Compare at $2,379
Save 61.1%IGI | 4.28ct | Oval | D | VVS2 | Excellent
From $1,282
Compare at $3,296
Save 60.8%IGI | 4.27ct | Oval | D | VVS2 | Excellent
From $1,288
Compare at $3,283
IGI | 4.24ct | Oval | FANCY | VS1 | Very Good
From $1,345
Compare at $1,448
Save 58.4%IGI | 4.22ct | Oval | D | VVS2 | Very Good
From $1,375
Compare at $3,304
Save 45.8%IGI | 4.21ct | Oval | E | VVS2 | Excellent
From $1,420
Compare at $2,621
Save 79.3%IGI | 4.22ct | Oval | H | VS1 | Ideal
From $1,425
Compare at $6,890
Entry pricing in this category starts around $640.
What to Know When Shopping for 4.2 Carat Oval Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $50,746 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 $4,112 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.
- Lab-grown diamonds offer excellent value. Ensure the stone comes with a GIA or IGI certificate confirming it is laboratory-grown.
- Check shipping, insurance, and return policies. The lowest sticker price is not always the best deal once you factor in total cost of purchase.
- Oval diamonds can appear larger than rounds of the same carat weight due to their elongated face-up area. Watch for the bow-tie effect in lower-quality cuts.
Frequently Asked Questions
We currently track 172 comparable stones in this segment. Prices start around $640 and go up to $51,386.
Based on the latest market data, the average asking price is about $5,752 with a median around $4,112.
The observed spread is roughly $50,746 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 completed market data, the fair market benchmark is $5,752. The median price is $4,112, 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 10 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 $50,746 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 Lab Grown inventory for 4.2 carat Oval diamonds.