4.2 Carat Heart Lab Grown Diamond Prices Comparison
As of April 2026, 4.2 carat heart lab grown diamonds usually range from $775 to $42,976, with an average price of $4,844.In the last month, prices for these diamonds are down 0.8%.Compare 56 verified listings across 6 retailers tracked by CaratRadar.
4.2 Carat Heart Lab Grown Diamond Market Overview
CaratRadar currently tracks 56 verified 4.2-carat heart lab grown diamonds listed across 6 online retailers. Prices in this segment range from $775 to $42,976, with an average asking price of $4,844 and a median of $3,253.
The price spread of $42,201 (98.2% 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.
56 diamonds tracked in this segment
Price range: $775 to $42,976
Average price: $4,844
Median price: $3,253
Available across 6 retailers
Savings potential: up to 98.2%
Price Range Overview
As of Apr 14, 2026Real market range for this carat, shape, and diamond type.
56
$775
$4,844
$3,253
$42,976
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 74.8%GIA | 4.21ct | Heart | D | VVS1 | Ideal
From $5,496
Compare at $21,780
Save 79.3%IGI | 4.21ct | Heart | G | VS2 | Ideal
From $1,367
Compare at $6,620
Save 87.1%IGI | 4.21ct | Heart | E | VVS2 | Excellent
From $1,303
Compare at $10,120
Save 62.4%IGI | 4.21ct | Heart | D | IF | Very Good
From $8,282
Compare at $22,050
Save 75.8%IGI | 4.22ct | Heart | D | VVS1 | Ideal
From $6,422
Compare at $26,530
Save 65.2%IGI | 4.22ct | Heart | F | VS2 | Ideal
From $1,586
Compare at $4,560
Save 79%IGI | 4.22ct | Heart | E | VS2 | Ideal
From $1,707
Compare at $8,130
Save 77.6%IGI | 4.22ct | Heart | D | IF | Ideal
From $8,348
Compare at $37,300
Save 75.7%IGI | 4.22ct | Heart | F | VS1 | Excellent
From $1,274
Compare at $5,240
Save 72%IGI | 4.22ct | Heart | E | VS1 | Ideal
From $1,612
Compare at $5,760
Save 83%IGI | 4.22ct | Heart | E | VVS2 | Ideal
From $1,719
Compare at $10,090
Save 83.8%IGI | 4.22ct | Heart | D | VVS2 | Excellent
From $1,934
Compare at $11,960
Save 82.5%IGI | 4.22ct | Heart | F | VVS2 | Ideal
From $1,591
Compare at $9,080
Save 76.1%IGI | 4.22ct | Heart | F | VVS2 | Very Good
From $1,782
Compare at $7,450
Save 87.3%IGI | 4.22ct | Heart | E | VVS2 | Ideal
From $1,285
Compare at $10,140
Save 77.5%IGI | 4.23ct | Heart | D | IF | Ideal
From $11,483
Compare at $50,930
Save 80.5%IGI | 4.23ct | Heart | E | VS2 | Ideal
From $1,574
Compare at $8,070
Save 76.3%IGI | 4.23ct | Heart | E | VVS2 | Very Good
From $2,106
Compare at $8,870
Save 77.9%IGI | 4.23ct | Heart | D | IF | Very Good
From $7,760
Compare at $35,050
Save 58.1%IGI | 4.24ct | Heart | E | VS1 | Excellent
From $3,806
Compare at $9,092
Save 78.4%IGI | 4.24ct | Heart | F | VS2 | Ideal
From $1,593
Compare at $7,380
Save 40.3%IGI | 4.24ct | Heart | G | VS1 | Ideal
From $1,442
Compare at $2,415
IGI | 4.24ct | Heart | F | VVS2 | Very Good
From $2,263
Compare at $2,265
Save 84.4%IGI | 4.24ct | Heart | E | VVS2 | Very Good
From $1,591
Compare at $10,220
Save 69.6%IGI | 4.25ct | Heart | E | IF | Ideal
From $15,712
Compare at $51,760
Save 58.1%IGI | 4.25ct | Heart | E | VS1 | Excellent
From $3,815
Compare at $9,113
Save 54.9%IGI | 4.25ct | Heart | E | VS1 | Ideal
From $1,460
Compare at $3,238
Save 72.7%IGI | 4.25ct | Heart | E | VS2 | Excellent
From $2,210
Compare at $8,110
Save 65.2%IGI | 4.25ct | Heart | F | VS1 | Ideal
From $1,719
Compare at $4,940
Save 76.1%IGI | 4.25ct | Heart | D | VS1 | Excellent
From $1,906
Compare at $7,960
Save 82.2%IGI | 4.25ct | Heart | D | VVS2 | Ideal
From $2,131
Compare at $11,970
Save 86.2%IGI | 4.25ct | Heart | D | VS1 | Excellent
From $1,445
Compare at $10,440
Save 65%GIA | 4.26ct | Heart | D | IF | Ideal
From $16,445
Compare at $46,960
IGI | 4.26ct | Heart | H | VS1 | Ideal
From $1,753
Compare at $1,855
Save 55.4%IGI | 4.26ct | Heart | J | VS1 | Ideal
From $1,834
Compare at $4,110
Save 79.4%IGI | 4.26ct | Heart | G | VS2 | Ideal
From $1,383
Compare at $6,700
Save 77.9%IGI | 4.26ct | Heart | E | VS1 | Ideal
From $2,455
Compare at $11,090
Save 86.5%IGI | 4.26ct | Heart | E | VVS2 | Very Good
From $1,383
Compare at $10,250
Save 80.2%IGI | 4.27ct | Heart | G | VS1 | Ideal
From $1,452
Compare at $7,320
IGI | 4.27ct | Heart | H | VS1 | Ideal
From $1,757
Compare at $1,859
Save 70.6%IGI | 4.27ct | Heart | E | VS1 | Ideal
From $1,850
Compare at $6,290
Save 64.6%IGI | 4.27ct | Heart | F | VVS1 | Very Good
From $3,731
Compare at $10,550
Save 87.1%IGI | 4.27ct | Heart | E | VVS2 | Excellent
From $1,321
Compare at $10,260
Save 86.6%IGI | 4.27ct | Heart | E | VS1 | Ideal
From $1,347
Compare at $10,090
Save 85%IGI | 4.27ct | Heart | E | VVS2 | Ideal
From $1,536
Compare at $10,270
Save 73.1%IGI | 4.28ct | Heart | E | VVS1 | Ideal
From $4,559
Compare at $16,920
Save 75.8%IGI | 4.28ct | Heart | D | VVS1 | Ideal
From $6,509
Compare at $26,890
Save 18%IGI | 4.28ct | Heart | F | VS2 | Excellent
From $5,491
Compare at $6,695
Save 80%IGI | 4.28ct | Heart | E | VVS1 | Very Good
From $2,364
Compare at $11,810
Save 84.4%IGI | 4.28ct | Heart | E | VS2 | Ideal
From $1,285
Compare at $8,220
Entry pricing in this category starts around $775.
What to Know When Shopping for 4.2 Carat Heart Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $42,201 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 $3,253 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.
- Heart-shaped diamonds require excellent symmetry to look balanced. Aim for carat weights above 0.5 where the shape is clearly visible.
Frequently Asked Questions
We currently track 56 comparable stones in this segment. Prices start around $775 and go up to $42,976.
Based on the latest market data, the average asking price is about $4,844 with a median around $3,253.
The observed spread is roughly $42,201 across tracked listings, which is about 98.2% 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 $3,253, 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 $42,201 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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