8.5 Carat Radiant Lab Grown Diamond Prices Comparison
As of April 2026, 8.5 carat radiant lab grown diamonds usually range from $1,355 to $33,146, with an average price of $6,930.In the last month, prices for these diamonds are down 0.1%.Compare 73 verified listings across 6 retailers tracked by CaratRadar.
8.5 Carat Radiant Lab Grown Diamond Market Overview
CaratRadar currently tracks 73 verified 8.5-carat radiant lab grown diamonds listed across 6 online retailers. Prices in this segment range from $1,355 to $33,146, with an average asking price of $6,930 and a median of $4,726.
The price spread of $31,791 (95.9% 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.
73 diamonds tracked in this segment
Price range: $1,355 to $33,146
Average price: $6,930
Median price: $4,726
Available across 6 retailers
Savings potential: up to 95.9%
Price Range Overview
As of Apr 14, 2026Real market range for this carat, shape, and diamond type.
73
$1,355
$6,930
$4,726
$33,146
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 75.5%IGI | 8.5ct | Radiant | F | VS1 | Excellent
From $3,476
Compare at $14,180
Save 32.5%IGI | 8.5ct | Radiant | H | VS2 | Very Good
From $1,824
Compare at $2,701
Save 71.4%IGI | 8.5ct | Radiant | F | VS1 | Very Good
From $3,916
Compare at $13,670
IGI | 8.5ct | Radiant | E | VS1 | Very Good
From $2,285
Compare at $15,790
GIA | 8.51ct | Radiant | F | VS2 | Ideal
From $15,370
Compare at $16,807
Save 75.8%IGI | 8.51ct | Radiant | E | VS2 | Excellent
From $3,367
Compare at $13,900
Save 83.1%IGI | 8.51ct | Radiant | G | VS2 | Ideal
From $2,354
Compare at $13,910
Save 16.6%IGI | 8.51ct | Radiant | I | VS2 | Ideal
From $6,060
Compare at $7,263
Save 83.6%IGI | 8.51ct | Radiant | G | VS1 | Ideal
From $2,470
Compare at $15,100
Save 86.1%IGI | 8.51ct | Radiant | E | VVS2 | Excellent
From $2,942
Compare at $21,220
Save 60.1%IGI | 8.51ct | Radiant | FANCY | VVS2 | Excellent
From $10,377
Compare at $26,021
Save 71.4%IGI | 8.51ct | Radiant | F | VS2 | Very Good
From $3,742
Compare at $13,100
Save 84.5%IGI | 8.51ct | Radiant | G | VVS2 | Excellent
From $2,265
Compare at $14,580
Save 86.9%IGI | 8.51ct | Radiant | F | VS1 | Ideal
From $2,288
Compare at $17,500
Save 85.6%IGI | 8.51ct | Radiant | F | VS1 | Very Good
From $2,540
Compare at $17,610
IGI | 8.51ct | Radiant | F | VVS2 | Very Good
From $2,356
Compare at $19,060
Save 75.5%IGI | 8.52ct | Radiant | F | VS1 | Excellent
From $3,484
Compare at $14,210
Save 86.9%IGI | 8.52ct | Radiant | E | VS2 | Excellent
From $2,218
Compare at $16,940
Save 84.9%IGI | 8.52ct | Radiant | F | VVS2 | Ideal
From $2,877
Compare at $19,100
Save 86.4%IGI | 8.52ct | Radiant | F | VVS2 | Excellent
From $2,602
Compare at $19,100
Save 78.7%IGI | 8.52ct | Radiant | E | VS2 | Ideal
From $3,591
Compare at $16,840
Save 81.6%IGI | 8.53ct | Radiant | G | VS1 | Excellent
From $2,784
Compare at $15,140
Save 76.6%IGI | 8.53ct | Radiant | G | VS1 | Excellent
From $6,749
Compare at $28,792
Save 86.1%IGI | 8.53ct | Radiant | F | VVS2 | Excellent
From $2,662
Compare at $19,120
Save 82.1%IGI | 8.53ct | Radiant | E | VS2 | Ideal
From $3,040
Compare at $16,990
Save 75.8%IGI | 8.53ct | Radiant | F | VS1 | Ideal
From $6,249
Compare at $25,810
Save 87.1%IGI | 8.53ct | Radiant | F | VVS2 | Ideal
From $2,452
Compare at $19,010
Save 88.3%IGI | 8.53ct | Radiant | E | VVS2 | Ideal
From $2,475
Compare at $21,240
Save 43.1%IGI | 8.53ct | Radiant | H | VVS2 | Ideal
From $2,652
Compare at $4,657
Save 77.3%IGI | 8.54ct | Radiant | H | VS1 | Excellent
From $2,760
Compare at $12,150
Save 87.3%IGI | 8.54ct | Radiant | E | VS1 | Excellent
From $2,720
Compare at $21,350
Save 75.5%IGI | 8.54ct | Radiant | F | VS1 | Excellent
From $3,492
Compare at $14,240
Save 86.2%IGI | 8.54ct | Radiant | E | VVS2 | Ideal
From $2,927
Compare at $21,220
Save 75.5%IGI | 8.54ct | Radiant | F | VS1 | Excellent
From $3,492
Compare at $14,240
Save 85.3%IGI | 8.54ct | Radiant | F | VS1 | Excellent
From $2,608
Compare at $17,680
Save 65.2%IGI | 8.54ct | Radiant | F | VS1 | Ideal
From $2,618
Compare at $7,529
Save 86.9%IGI | 8.54ct | Radiant | F | VS1 | Ideal
From $2,296
Compare at $17,570
Save 86%IGI | 8.54ct | Radiant | F | VVS2 | Very Good
From $2,675
Compare at $19,150
IGI | 8.54ct | Radiant | E | VVS2 | Very Good
From $2,546
Compare at $21,270
Save 61.2%IGI | 8.55ct | Radiant | FANCY | VS2 | Very Good
From $6,374
Compare at $16,433
Save 71.4%IGI | 8.55ct | Radiant | E | VS1 | Very Good
From $4,140
Compare at $14,490
Save 39.6%IGI | 8.55ct | Radiant | E | VVS2 | Ideal
From $2,965
Compare at $4,911
Save 80.6%IGI | 8.55ct | Radiant | E | VVS2 | Excellent
From $4,117
Compare at $21,190
Save 85.7%IGI | 8.55ct | Radiant | F | VVS2 | Excellent
From $2,744
Compare at $19,170
Save 77.9%IGI | 8.55ct | Radiant | F | VS2 | Ideal
From $2,412
Compare at $10,920
Save 71.4%IGI | 8.55ct | Radiant | F | VVS2 | Very Good
From $3,939
Compare at $13,750
Save 47.8%IGI | 8.55ct | Radiant | E | VVS2 | Ideal
From $2,555
Compare at $4,890
Save 38.6%IGI | 8.55ct | Radiant | F | VVS2 | Excellent
From $2,290
Compare at $3,729
Save 84.9%IGI | 8.56ct | Radiant | G | VS1 | Excellent
From $2,293
Compare at $15,190
Save 87.2%IGI | 8.56ct | Radiant | F | VVS2 | Ideal
From $2,440
Compare at $19,080
Entry pricing in this category starts around $1,355.
What to Know When Shopping for 8.5 Carat Radiant Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $31,791 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 $4,726 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 73 comparable stones in this segment. Prices start around $1,355 and go up to $33,146.
Based on the latest market data, the average asking price is about $6,930 with a median around $4,726.
The observed spread is roughly $31,791 across tracked listings, which is about 95.9% 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 $4,726, 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 $31,791 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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