4.2 Carat Princess Lab Grown Diamond Prices Comparison
As of February 2026, 4.2 carat princess lab grown diamonds usually range from $790 to $29,229, with an average price of $1,695.In the last month, prices for these diamonds are down 2.4%.Compare 228 verified listings across 8 retailers tracked by CaratRadar.
4.2 Carat Princess Lab Grown Diamond Market Overview
CaratRadar currently tracks 228 verified 4.2-carat princess lab grown diamonds listed across 8 online retailers. Prices in this segment range from $790 to $29,229, with an average asking price of $1,695 and a median of $1,129.
The price spread of $28,439 (97.3% 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.
228 diamonds tracked in this segment
Price range: $790 to $29,229
Average price: $1,695
Median price: $1,129
Available across 8 retailers
Savings potential: up to 97.3%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
228
$790
$1,695
$1,129
$29,229
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
IGISave 79.4%4.16ct | Princess | H | VS1 | Excellent
From $966
Compare at $4,680
IGISave 84.5%4.16ct | Princess | H | VS1 | Ideal
From $1,314
Compare at $8,450
IGISave 78.3%4.16ct | Princess | E | VVS2 | Excellent
From $2,201
Compare at $10,130
IGISave 50.7%4.16ct | Princess | FANCY | VVS2 | Very Good
From $1,609
Compare at $3,262
IGISave 87.3%4.16ct | Princess | D | VS2 | Very Good
From $1,083
Compare at $8,550
IGISave 86.3%4.16ct | Princess | E | VS1 | Very Good
From $1,338
Compare at $9,790
IGISave 87.9%4.16ct | Princess | F | VVS2 | Ideal
From $1,077
Compare at $8,910
IGISave 77.2%4.16ct | Princess | E | VVS1 | Very Good
From $2,630
Compare at $11,520
IGISave 71.2%4.16ct | Princess | D | VVS2 | Ideal
From $1,507
Compare at $5,240
IGISave 71.2%4.16ct | Princess | D | VVS2 | Ideal
From $1,507
Compare at $5,240
IGISave 19.2%4.16ct | Princess | G | VVS2 | Ideal
From $947
Compare at $1,173
IGISave 75.5%4.16ct | Princess | E | VVS2 | Ideal
From $1,121
Compare at $4,575
IGISave 75.5%4.16ct | Princess | E | VVS2 | Ideal
From $1,121
Compare at $4,575
IGISave 88.1%4.16ct | Princess | E | VS1 | Ideal
From $1,161
Compare at $9,790
4.16ct | Princess | E | VVS2 | Ideal
From $1,121
Compare at $4,575
4.16ct | Princess | E | VVS2 | Ideal
From $1,104
Compare at $4,575
4.16ct | Princess | F | VVS2 | Ideal
From $1,077
Compare at $8,910
IGISave 86.2%4.16ct | Princess | E | VVS2 | Ideal
From $1,134
Compare at $8,190
IGISave 83.4%4.16ct | Princess | E | VS2 | Very Good
From $1,313
Compare at $7,920
IGISave 86.3%4.16ct | Princess | E | VS1 | Very Good
From $1,338
Compare at $9,790
IGISave 68%4.16ct | Princess | E | VS2 | Ideal
From $1,077
Compare at $3,365
IGISave 85%4.16ct | Princess | E | VVS2 | Ideal
From $1,493
Compare at $9,950
IGISave 88.6%4.16ct | Princess | E | VS1 | Ideal
From $1,121
Compare at $9,830
IGISave 87%4.16ct | Princess | D | VVS2 | Ideal
From $1,507
Compare at $11,610
IGISave 84.9%4.16ct | Princess | H | VVS2 | Ideal
From $1,167
Compare at $7,740
IGISave 82.7%4.16ct | Princess | G | VS1 | Excellent
From $973
Compare at $5,620
IGISave 69.5%4.16ct | Princess | E | VS1 | Excellent
From $1,090
Compare at $3,575
IGISave 69.5%4.16ct | Princess | E | VS1 | Excellent
From $1,090
Compare at $3,575
IGISave 69.1%4.16ct | Princess | E | VS1 | Ideal
From $1,104
Compare at $3,575
IGISave 69.1%4.16ct | Princess | E | VS1 | Ideal
From $1,104
Compare at $3,575
IGISave 75.5%4.16ct | Princess | E | VVS2 | Ideal
From $1,121
Compare at $4,575
IGISave 75.5%4.16ct | Princess | E | VVS2 | Excellent
From $1,121
Compare at $4,575
GIASave 74.8%4.16ct | Princess | D | VVS2 | Excellent
From $5,578
Compare at $22,100
IGISave 87.2%4.16ct | Princess | F | VS1 | Excellent
From $1,058
Compare at $8,260
IGISave 79.9%4.16ct | Princess | H | VS1 | Excellent
From $966
Compare at $4,810
IGISave 86.9%4.17ct | Princess | H | VVS2 | Ideal
From $848
Compare at $6,500
4.17ct | Princess | F | VS1 | Ideal
From $941
Compare at $7,100
IGISave 75.5%4.17ct | Princess | E | VVS2 | Excellent
From $1,123
Compare at $4,585
IGISave 75.5%4.17ct | Princess | E | VVS2 | Ideal
From $1,123
Compare at $4,585
IGISave 75.5%4.17ct | Princess | E | VVS2 | Ideal
From $1,123
Compare at $4,585
GIASave 84.6%4.17ct | Princess | D | VVS1 | Excellent
From $6,090
Compare at $39,434
IGISave 66.8%4.17ct | Princess | D | VVS2 | Excellent
From $1,742
Compare at $5,250
IGISave 90.4%4.17ct | Princess | E | VS1 | Ideal
From $941
Compare at $9,810
IGISave 89.5%4.17ct | Princess | F | VVS2 | Excellent
From $941
Compare at $8,930
IGISave 90.4%4.17ct | Princess | E | VS1 | Excellent
From $941
Compare at $9,810
4.17ct | Princess | E | VVS2 | Ideal
From $1,123
Compare at $4,585
GCALSave 70%4.17ct | Princess | I | VS1 | Excellent
From $2,361
Compare at $7,870
IGISave 86.5%4.17ct | Princess | E | VVS2 | Ideal
From $1,137
Compare at $8,410
IGISave 87.3%4.17ct | Princess | D | VVS2 | Ideal
From $1,482
Compare at $11,690
IGISave 84.8%4.17ct | Princess | F | VS1 | Very Good
From $1,504
Compare at $9,910
Entry pricing in this category starts around $790.
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 $28,439 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 $1,129 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 228 comparable stones in this segment. Prices start around $790 and go up to $29,229.
Based on the latest market data, the average asking price is about $1,695 with a median around $1,129.
The observed spread is roughly $28,439 across tracked listings, which is about 97.3% 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 $1,129, 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 8 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 $28,439 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.