4.8 Carat Radiant Lab Grown Diamond Prices Comparison
As of February 2026, 4.8 carat radiant lab grown diamonds usually range from $872 to $31,714, with an average price of $3,095.In the last month, prices for these diamonds are down 0.5%.Compare 128 verified listings across 7 retailers tracked by CaratRadar.
4.8 Carat Radiant Lab Grown Diamond Market Overview
CaratRadar currently tracks 128 verified 4.8-carat radiant lab grown diamonds listed across 7 online retailers. Prices in this segment range from $872 to $31,714, with an average asking price of $3,095 and a median of $1,715.
The price spread of $30,842 (97.2% 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.
128 diamonds tracked in this segment
Price range: $872 to $31,714
Average price: $3,095
Median price: $1,715
Available across 7 retailers
Savings potential: up to 97.2%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
128
$872
$3,095
$1,715
$31,714
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 81.8%4.75ct | Radiant | G | SI1 | Very Good
From $1,201
Compare at $6,590
IGISave 86.2%4.75ct | Radiant | E | SI1 | Ideal
From $1,074
Compare at $7,780
GIASave 64%4.75ct | Radiant | F | VS1 | Excellent
From $3,589
Compare at $9,956
IGISave 40.5%4.75ct | Radiant | H | VS2 | Ideal
From $1,516
Compare at $2,546
IGISave 83%4.75ct | Radiant | E | VS1 | Ideal
From $1,948
Compare at $11,460
GIASave 46.6%4.75ct | Radiant | E | VS1 | Ideal
From $7,530
Compare at $14,090
GIASave 60.8%4.75ct | Radiant | E | VS1 | Excellent
From $3,475
Compare at $8,864
IGISave 77.8%4.75ct | Radiant | F | VS1 | Ideal
From $1,308
Compare at $5,880
IGISave 71.3%4.75ct | Radiant | F | VS1 | Very Good
From $2,510
Compare at $8,740
IGISave 81.5%4.75ct | Radiant | E | VVS2 | Very Good
From $2,134
Compare at $11,520
IGISave 84.4%4.76ct | Radiant | G | VS2 | Ideal
From $1,252
Compare at $8,030
IGISave 67%4.76ct | Radiant | E | VS2 | Ideal
From $3,025
Compare at $9,180
IGISave 80.4%4.76ct | Radiant | F | VVS2 | Very Good
From $1,748
Compare at $8,920
IGISave 71.1%4.76ct | Radiant | F | VS2 | Very Good
From $1,004
Compare at $3,470
GIASave 77.5%4.76ct | Radiant | D | VVS1 | Good
From $7,508
Compare at $33,303
GIASave 69.1%4.76ct | Radiant | D | VVS1 | Excellent
From $7,339
Compare at $23,760
IGISave 75.4%4.76ct | Radiant | F | VVS2 | Excellent
From $1,569
Compare at $6,390
IGISave 80.7%4.76ct | Radiant | F | VVS2 | Very Good
From $1,718
Compare at $8,920
IGISave 88.3%4.76ct | Radiant | E | SI1 | Ideal
From $909
Compare at $7,800
GIASave 72.7%4.76ct | Radiant | D | VVS2 | Excellent
From $5,385
Compare at $19,734
GCALSave 69.6%4.76ct | Radiant | D | IF | Excellent
From $14,208
Compare at $46,800
IGISave 43.1%4.77ct | Radiant | F | VS2 | Ideal
From $2,894
Compare at $5,090
IGISave 39.4%4.77ct | Radiant | E | VVS2 | Very Good
From $2,171
Compare at $3,582
GIASave 64%4.77ct | Radiant | E | VS1 | Ideal
From $8,300
Compare at $23,070
GIASave 70.3%4.77ct | Radiant | E | VS2 | Ideal
From $6,296
Compare at $21,230
IGISave 81.8%4.77ct | Radiant | G | SI1 | Very Good
From $1,206
Compare at $6,610
IGISave 86.2%4.77ct | Radiant | E | SI1 | Ideal
From $1,078
Compare at $7,810
GCALSave 70.9%4.77ct | Radiant | D | VS1 | Excellent
From $2,762
Compare at $9,480
IGISave 71.2%4.77ct | Radiant | F | VVS2 | Very Good
From $2,573
Compare at $8,940
IGISave 71.3%4.77ct | Radiant | E | VVS2 | Very Good
From $2,663
Compare at $9,270
IGISave 75.7%4.77ct | Radiant | F | VS2 | Very Good
From $1,237
Compare at $5,090
IGISave 84.6%4.77ct | Radiant | G | VS1 | Very Good
From $1,590
Compare at $10,320
GIASave 69.3%4.77ct | Radiant | E | VVS2 | Excellent
From $3,537
Compare at $11,520
GIASave 60.6%4.77ct | Radiant | E | VVS2 | Excellent
From $3,681
Compare at $9,334
GCALSave 70.9%4.77ct | Radiant | G | VS1 | Excellent
From $3,120
Compare at $10,710
GIASave 31.4%4.78ct | Radiant | E | VVS1 | Excellent
From $6,428
Compare at $9,371
GIASave 83%4.78ct | Radiant | D | VVS1 | Excellent
From $5,917
Compare at $34,800
IGISave 83%4.78ct | Radiant | F | SI1 | Ideal
From $1,324
Compare at $7,780
IGISave 82.3%4.78ct | Radiant | F | VVS1 | Excellent
From $2,117
Compare at $11,950
IGISave 32.3%4.78ct | Radiant | G | VVS2 | Very Good
From $1,292
Compare at $1,910
IGISave 80.4%4.78ct | Radiant | F | VS1 | Very Good
From $1,723
Compare at $8,800
IGISave 82.8%4.78ct | Radiant | D | VVS2 | Ideal
From $2,324
Compare at $13,530
IGISave 81.4%4.78ct | Radiant | G | VS1 | Ideal
From $998
Compare at $5,370
IGISave 54.3%4.79ct | Radiant | E | VVS2 | Ideal
From $1,560
Compare at $3,417
IGISave 86.4%4.79ct | Radiant | E | SI1 | Ideal
From $1,133
Compare at $8,300
IGISave 84.7%4.79ct | Radiant | F | VS2 | Very Good
From $1,665
Compare at $10,850
IGISave 71.3%4.79ct | Radiant | E | VVS2 | Ideal
From $2,674
Compare at $9,310
IGISave 62.9%4.79ct | Radiant | FANCY | VVS2 | Very Good
From $4,532
Compare at $12,223
IGISave 86.6%4.79ct | Radiant | E | VVS2 | Very Good
From $1,545
Compare at $11,520
IGISave 67.2%4.79ct | Radiant | F | VS2 | Ideal
From $1,196
Compare at $3,640
Entry pricing in this category starts around $872.
What to Know When Shopping for 4.8 Carat Radiant Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $30,842 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 $1,715 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.
- Radiant cuts combine the elegance of emerald shapes with the brilliance of round cuts, offering good value per carat.
Frequently Asked Questions
We currently track 128 comparable stones in this segment. Prices start around $872 and go up to $31,714.
Based on the latest market data, the average asking price is about $3,095 with a median around $1,715.
The observed spread is roughly $30,842 across tracked listings, which is about 97.2% 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 $1,715, 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 7 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 $30,842 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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