8.3 Carat Radiant Lab Grown Diamond Prices Comparison
As of April 2026, 8.3 carat radiant lab grown diamonds usually range from $663 to $26,051, with an average price of $5,950.In the last month, prices for these diamonds are up 1.3%.Compare 36 verified listings across 6 retailers tracked by CaratRadar.
8.3 Carat Radiant Lab Grown Diamond Market Overview
CaratRadar currently tracks 36 verified 8.3-carat radiant lab grown diamonds listed across 6 online retailers. Prices in this segment range from $663 to $26,051, with an average asking price of $5,950 and a median of $4,521.
The price spread of $25,388 (97.5% 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.
36 diamonds tracked in this segment
Price range: $663 to $26,051
Average price: $5,950
Median price: $4,521
Available across 6 retailers
Savings potential: up to 97.5%
Price Range Overview
As of Apr 15, 2026Real market range for this carat, shape, and diamond type.
36
$663
$5,950
$4,521
$26,051
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 87.2%IGI | 8.31ct | Radiant | F | VVS2 | Ideal
From $2,370
Compare at $18,520
Save 78.1%IGI | 8.31ct | Radiant | F | VS2 | Excellent
From $2,170
Compare at $9,910
Save 61.1%IGI | 8.31ct | Radiant | FANCY | VS1 | Excellent
From $8,463
Compare at $21,779
Save 67.4%IGI | 8.31ct | Radiant | F | VS2 | Excellent
From $4,778
Compare at $14,650
Save 90.9%IGI | 8.31ct | Radiant | F | VVS2 | Very Good
From $1,690
Compare at $18,610
Save 71.3%IGI | 8.32ct | Radiant | F | VVS2 | Very Good
From $3,833
Compare at $13,380
Save 88.1%IGI | 8.32ct | Radiant | E | VVS2 | Very Good
From $2,459
Compare at $20,720
Save 87.9%IGI | 8.32ct | Radiant | F | VVS2 | Very Good
From $2,259
Compare at $18,630
Save 88.1%IGI | 8.32ct | Radiant | E | VVS2 | Very Good
From $2,459
Compare at $20,720
Save 39.1%IGI | 8.33ct | Radiant | F | VS2 | Excellent
From $3,063
Compare at $5,032
Save 84.5%IGI | 8.33ct | Radiant | F | VS1 | Ideal
From $2,654
Compare at $17,130
Save 46.1%GIA | 8.34ct | Radiant | G | VS1 | Very Good
From $9,865
Compare at $18,306
Save 72.2%IGI | 8.34ct | Radiant | H | VS1 | Ideal
From $2,459
Compare at $8,830
Save 83.5%IGI | 8.34ct | Radiant | G | VVS2 | Ideal
From $2,242
Compare at $13,620
Save 83.4%IGI | 8.34ct | Radiant | F | VS1 | Ideal
From $2,242
Compare at $13,480
Save 84.2%IGI | 8.34ct | Radiant | F | VS1 | Excellent
From $2,242
Compare at $14,180
Save 74.2%IGI | 8.34ct | Radiant | F | VVS2 | Very Good
From $5,090
Compare at $19,740
Save 87.2%IGI | 8.35ct | Radiant | F | VVS2 | Excellent
From $2,396
Compare at $18,720
Save 71.4%IGI | 8.35ct | Radiant | F | VVS2 | Very Good
From $3,847
Compare at $13,430
Save 68.5%IGI | 8.35ct | Radiant | F | VVS2 | Ideal
From $2,681
Compare at $8,515
Save 88.1%IGI | 8.35ct | Radiant | E | VVS2 | Very Good
From $2,468
Compare at $20,800
IGI | 8.35ct | Radiant | F | VS1 | Very Good
From $2,123
Compare at $17,250
Save 62%GIA | 8.36ct | Radiant | F | VS1 | Very Good
From $18,640
Compare at $49,020
Save 80.7%IGI | 8.36ct | Radiant | F | VS1 | Ideal
From $2,195
Compare at $11,390
Save 86.2%IGI | 8.37ct | Radiant | G | VVS2 | Excellent
From $2,293
Compare at $16,630
Save 79.8%IGI | 8.37ct | Radiant | F | VS1 | Ideal
From $3,484
Compare at $17,220
Save 87.2%IGI | 8.37ct | Radiant | F | VVS2 | Ideal
From $2,385
Compare at $18,660
Save 83.8%IGI | 8.38ct | Radiant | F | VS2 | Ideal
From $2,410
Compare at $14,880
Save 71.9%IGI | 8.39ct | Radiant | E | VVS2 | Very Good
From $4,151
Compare at $14,790
Save 39.1%IGI | 8.39ct | Radiant | F | VVS2 | Ideal
From $2,933
Compare at $4,816
Save 87.2%IGI | 8.39ct | Radiant | F | VVS2 | Ideal
From $2,390
Compare at $18,700
Save 87.1%IGI | 8.39ct | Radiant | F | VVS2 | Ideal
From $2,412
Compare at $18,700
Save 87.7%IGI | 8.39ct | Radiant | G | VVS2 | Excellent
From $2,051
Compare at $16,670
Save 65.2%IGI | 8.39ct | Radiant | F | VS1 | Ideal
From $2,572
Compare at $7,396
Save 84.9%IGI | 8.39ct | Radiant | F | VS1 | Ideal
From $2,256
Compare at $14,980
Save 65.5%IGI | 8.4ct | Radiant | F | VS2 | Very Good
From $2,598
Compare at $7,539
Entry pricing in this category starts around $663.
What to Know When Shopping for 8.3 Carat Radiant Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $25,388 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 $4,521 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 36 comparable stones in this segment. Prices start around $663 and go up to $26,051.
Based on the latest market data, the average asking price is about $5,950 with a median around $4,521.
The observed spread is roughly $25,388 across tracked listings, which is about 97.5% 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 $4,521, 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 $25,388 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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