4.2 Carat Oval Lab Grown Diamond Prices Comparison
As of April 2026, 4.2 carat oval lab grown diamonds usually range from $660 to $51,822, with an average price of $6,158.In the last month, prices for these diamonds are up 0.3%.Compare 356 verified listings across 10 retailers tracked by CaratRadar.
4.2 Carat Oval Lab Grown Diamond Market Overview
CaratRadar currently tracks 356 verified 4.2-carat oval lab grown diamonds listed across 10 online retailers. Prices in this segment range from $660 to $51,822, with an average asking price of $6,158 and a median of $4,755.
The price spread of $51,162 (98.7% 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.
356 diamonds tracked in this segment
Price range: $660 to $51,822
Average price: $6,158
Median price: $4,755
Available across 10 retailers
Savings potential: up to 98.7%
Price Range Overview
As of Apr 14, 2026Real market range for this carat, shape, and diamond type.
356
$660
$6,158
$4,755
$51,822
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 74.5%GCAL | 4.21ct | Oval | D | IF | Excellent
From $13,942
Compare at $54,640
Save 72.7%GIA | 4.21ct | Oval | D | VVS2 | Excellent
From $5,835
Compare at $21,350
Save 69.1%GIA | 4.21ct | Oval | D | VVS1 | Excellent
From $8,890
Compare at $28,770
Save 75.8%GIA | 4.21ct | Oval | D | VVS1 | Very Good
From $6,442
Compare at $26,610
Save 72%GIA | 4.21ct | Oval | D | IF | Excellent
From $14,365
Compare at $51,280
Save 68.8%GIA | 4.21ct | Oval | H | VS1 | Ideal
From $2,986
Compare at $9,570
Save 70.6%GIA | 4.21ct | Oval | D | VVS1 | Excellent
From $8,890
Compare at $30,190
Save 66%GIA | 4.21ct | Oval | E | IF | Excellent
From $15,745
Compare at $46,260
Save 58.9%GIA | 4.21ct | Oval | D | IF | Excellent
From $20,023
Compare at $48,770
Save 71.7%GIA | 4.21ct | Oval | G | VS1 | Ideal
From $2,912
Compare at $10,280
Save 70.6%GIA | 4.21ct | Oval | D | VVS1 | Ideal
From $8,890
Compare at $30,190
Save 67%GIA | 4.21ct | Oval | D | IF | Excellent
From $16,945
Compare at $51,280
Save 47.1%GIA | 4.21ct | Oval | D | VVS2 | Ideal
From $5,835
Compare at $11,023
Save 72.7%GIA | 4.21ct | Oval | D | VVS2 | Ideal
From $5,835
Compare at $21,350
Save 81.9%IGI | 4.21ct | Oval | E | VS1 | Ideal
From $1,604
Compare at $8,862
Save 76.1%IGI | 4.21ct | Oval | G | VVS2 | Ideal
From $1,815
Compare at $7,590
Save 76.9%IGI | 4.21ct | Oval | G | VS1 | Ideal
From $1,740
Compare at $7,540
Save 71.3%IGI | 4.21ct | Oval | H | VS1 | Ideal
From $4,510
Compare at $15,710
Save 55.3%IGI | 4.21ct | Oval | G | VS1 | Very Good
From $1,251
Compare at $2,800
Save 72.5%IGI | 4.21ct | Oval | G | VS1 | Excellent
From $1,160
Compare at $4,220
IGI | 4.21ct | Oval | D | FL | Good
From $32,453
Compare at $34,455
Save 63.8%IGI | 4.21ct | Oval | H | VVS2 | Good
From $1,492
Compare at $4,120
Save 74.8%IGI | 4.21ct | Oval | D | VVS1 | Ideal
From $5,496
Compare at $21,780
Save 76.3%IGI | 4.21ct | Oval | D | IF | Very Good
From $7,205
Compare at $30,380
Save 49.1%IGI | 4.21ct | Oval | E | VVS1 | Ideal
From $3,715
Compare at $7,299
IGI | 4.21ct | Oval | E | VVS2 | Very Good
From $2,168
Compare at $2,170
Save 79.5%IGI | 4.21ct | Oval | D | VS1 | Very Good
From $2,196
Compare at $10,730
Save 63.4%IGI | 4.21ct | Oval | E | VVS1 | Excellent
From $3,145
Compare at $8,600
Save 40.4%IGI | 4.21ct | Oval | E | VVS2 | Excellent
From $1,393
Compare at $2,337
Save 76.3%IGI | 4.21ct | Oval | F | VVS2 | Excellent
From $1,680
Compare at $7,080
Save 75.9%IGI | 4.21ct | Oval | F | VS1 | Excellent
From $1,270
Compare at $5,280
Save 72.4%IGI | 4.21ct | Oval | E | VVS1 | Ideal
From $3,328
Compare at $12,060
Save 69.9%IGI | 4.21ct | Oval | D | IF | Excellent
From $14,977
Compare at $49,749
Save 79.6%IGI | 4.21ct | Oval | D | IF | Good
From $7,275
Compare at $35,746
Save 34.9%IGI | 4.21ct | Oval | F | VVS2 | Excellent
From $1,302
Compare at $2,001
Save 63.5%IGI | 4.21ct | Oval | D | VVS1 | Very Good
From $3,395
Compare at $9,300
Save 34%IGI | 4.21ct | Oval | E | VS1 | Very Good
From $1,270
Compare at $1,923
Save 46%IGI | 4.21ct | Oval | D | IF | Ideal
From $9,452
Compare at $17,498
Save 86.4%IGI | 4.21ct | Oval | D | VS1 | Excellent
From $1,452
Compare at $10,660
Save 69.4%IGI | 4.21ct | Oval | D | IF | Ideal
From $6,878
Compare at $22,470
Save 77.7%IGI | 4.21ct | Oval | E | VVS2 | Very Good
From $2,421
Compare at $10,840
Save 73.5%IGI | 4.21ct | Oval | D | VVS2 | Very Good
From $1,930
Compare at $7,280
Save 78.3%IGI | 4.21ct | Oval | E | VVS2 | Very Good
From $1,406
Compare at $6,490
Save 76.7%IGI | 4.21ct | Oval | E | VVS2 | Very Good
From $1,406
Compare at $6,030
Save 52.1%IGI | 4.21ct | Oval | E | VVS2 | Excellent
From $4,100
Compare at $8,558
Save 69.6%IGI | 4.21ct | Oval | D | FL | Very Good
From $14,967
Compare at $49,310
Save 52.5%IGI | 4.21ct | Oval | D | VVS1 | Very Good
From $5,057
Compare at $10,651
Save 87.9%IGI | 4.21ct | Oval | D | VVS2 | Ideal
From $1,455
Compare at $12,070
Save 14%IGI | 4.21ct | Oval | E | VS1 | Good
From $4,100
Compare at $4,765
Save 64.6%IGI | 4.21ct | Oval | F | VS1 | Ideal
From $1,177
Compare at $3,325
Entry pricing in this category starts around $660.
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 $51,162 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 $4,755 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 356 comparable stones in this segment. Prices start around $660 and go up to $51,822.
Based on the latest market data, the average asking price is about $6,158 with a median around $4,755.
The observed spread is roughly $51,162 across tracked listings, which is about 98.7% 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 $4,755, 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 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 $51,162 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.