4.2 Carat Princess Lab Grown Diamond Prices Comparison
As of April 2026, 4.2 carat princess lab grown diamonds usually range from $665 to $38,492, with an average price of $4,345.In the last month, prices for these diamonds are up 0.8%.Compare 98 verified listings across 6 retailers tracked by CaratRadar.
4.2 Carat Princess Lab Grown Diamond Market Overview
CaratRadar currently tracks 98 verified 4.2-carat princess lab grown diamonds listed across 6 online retailers. Prices in this segment range from $665 to $38,492, with an average asking price of $4,345 and a median of $3,102.
The price spread of $37,827 (98.3% 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.
98 diamonds tracked in this segment
Price range: $665 to $38,492
Average price: $4,345
Median price: $3,102
Available across 6 retailers
Savings potential: up to 98.3%
Price Range Overview
As of Apr 14, 2026Real market range for this carat, shape, and diamond type.
98
$665
$4,345
$3,102
$38,492
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 75.9%GIA | 4.21ct | Princess | E | VVS1 | Excellent
From $5,380
Compare at $22,340
IGI | 4.21ct | Princess | I | VVS2 | Ideal
From $1,455
Save 66%IGI | 4.21ct | Princess | H | VS2 | Ideal
From $1,851
Compare at $5,440
Save 79.6%IGI | 4.21ct | Princess | F | VS1 | Ideal
From $1,264
Compare at $6,200
Save 77.9%IGI | 4.21ct | Princess | H | VVS2 | Ideal
From $1,455
Compare at $6,570
Save 75.5%IGI | 4.21ct | Princess | G | VVS2 | Ideal
From $1,432
Compare at $5,850
Save 57%IGI | 4.21ct | Princess | H | VS1 | Ideal
From $2,540
Compare at $5,910
Save 78.9%IGI | 4.21ct | Princess | E | VS1 | Excellent
From $1,955
Compare at $9,260
Save 81.8%IGI | 4.21ct | Princess | E | VS1 | Excellent
From $1,616
Compare at $8,862
Save 78.3%IGI | 4.21ct | Princess | E | VVS2 | Excellent
From $2,205
Compare at $10,170
Save 81.7%IGI | 4.21ct | Princess | D | VS1 | Excellent
From $1,877
Compare at $10,240
Save 80.5%IGI | 4.21ct | Princess | E | VVS2 | Ideal
From $1,981
Compare at $10,170
Save 77.6%IGI | 4.21ct | Princess | G | VVS2 | Ideal
From $1,030
Compare at $4,590
Save 79%IGI | 4.21ct | Princess | E | VS1 | Excellent
From $1,296
Compare at $6,180
Save 81.4%IGI | 4.21ct | Princess | E | VS1 | Ideal
From $1,228
Compare at $6,590
Save 55.7%IGI | 4.21ct | Princess | F | VS1 | Ideal
From $2,126
Compare at $4,800
Save 78.6%GIA | 4.22ct | Princess | D | VVS1 | Excellent
From $8,245
Compare at $38,610
Save 78.6%GIA | 4.22ct | Princess | D | VVS1 | Excellent
From $8,245
Compare at $38,610
Save 72.3%IGI | 4.22ct | Princess | G | VS1 | Excellent
From $1,231
Compare at $4,450
Save 77.9%IGI | 4.22ct | Princess | E | VS1 | Very Good
From $2,255
Compare at $10,220
Save 80.7%IGI | 4.22ct | Princess | F | VS1 | Ideal
From $1,267
Compare at $6,560
Save 77%IGI | 4.22ct | Princess | G | VS1 | Ideal
From $955
Compare at $4,150
Save 77.6%IGI | 4.22ct | Princess | G | VS1 | Ideal
From $1,122
Compare at $5,010
Save 98.3%IGI | 4.22ct | Princess | F | SI1 | Excellent
From $1,832
Compare at $105,500
Save 74.7%IGI | 4.22ct | Princess | F | VS1 | Ideal
From $1,217
Compare at $4,810
Save 83%IGI | 4.22ct | Princess | E | VS1 | Excellent
From $1,690
Compare at $9,930
Save 77%IGI | 4.22ct | Princess | D | VVS2 | Ideal
From $1,581
Compare at $6,860
Save 78.6%IGI | 4.22ct | Princess | E | VVS2 | Ideal
From $1,258
Compare at $5,880
Save 76.4%GIA | 4.23ct | Princess | D | VVS2 | Very Good
From $5,550
Compare at $23,520
Save 43.2%GIA | 4.23ct | Princess | F | VS1 | Ideal
From $4,845
Compare at $8,530
Save 78.3%GIA | 4.23ct | Princess | D | VVS1 | Excellent
From $7,995
Compare at $36,830
Save 70.7%IGI | 4.23ct | Princess | F | VS2 | Ideal
From $2,136
Compare at $7,290
Save 80.7%IGI | 4.23ct | Princess | E | VVS2 | Ideal
From $1,622
Compare at $8,420
Save 76.3%IGI | 4.23ct | Princess | F | VS1 | Very Good
From $1,915
Compare at $8,080
Save 83.7%IGI | 4.23ct | Princess | E | VS1 | Ideal
From $940
Compare at $5,770
Save 80.6%IGI | 4.23ct | Princess | E | VVS2 | Ideal
From $1,471
Compare at $7,570
Save 54.1%IGI | 4.23ct | Princess | FANCY | VS1 | Very Good
From $4,067
Compare at $8,869
Save 80.4%IGI | 4.23ct | Princess | E | VVS2 | Excellent
From $1,237
Compare at $6,320
Save 77.1%IGI | 4.23ct | Princess | E | VVS2 | Ideal
From $1,067
Compare at $4,650
IGI | 4.24ct | Princess | I | VVS2 | Ideal
From $1,465
Save 66%IGI | 4.24ct | Princess | H | VS1 | Ideal
From $1,180
Compare at $3,470
Save 76.3%IGI | 4.24ct | Princess | E | VS1 | Very Good
From $2,016
Compare at $8,520
Save 75.1%IGI | 4.24ct | Princess | G | VVS2 | Very Good
From $1,828
Compare at $7,340
Save 81.4%IGI | 4.24ct | Princess | D | VS1 | Excellent
From $1,914
Compare at $10,310
Save 56.2%IGI | 4.24ct | Princess | FANCY | VS1 | Very Good
From $4,134
Compare at $9,429
Save 54.2%IGI | 4.24ct | Princess | FANCY | VVS2 | Excellent
From $3,395
Compare at $7,408
Save 78.8%IGI | 4.24ct | Princess | D | VS2 | Excellent
From $1,856
Compare at $8,750
Save 76.3%IGI | 4.24ct | Princess | D | VS2 | Very Good
From $2,075
Compare at $8,750
Save 77%IGI | 4.24ct | Princess | E | VVS2 | Ideal
From $1,070
Compare at $4,660
Save 81.6%IGI | 4.24ct | Princess | E | VVS2 | Very Good
From $1,474
Compare at $8,020
Entry pricing in this category starts around $665.
What to Know When Shopping for 4.2 Carat Princess Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $37,827 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 $3,102 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.
- Princess-cut diamonds are prone to chipping at the corners. Look for protective prong settings and avoid stones with visible inclusions near the edges.
Frequently Asked Questions
We currently track 98 comparable stones in this segment. Prices start around $665 and go up to $38,492.
Based on the latest market data, the average asking price is about $4,345 with a median around $3,102.
The observed spread is roughly $37,827 across tracked listings, which is about 98.3% 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 $3,102, 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 $37,827 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 Princess diamonds.