8.5 Carat Radiant Lab Grown Diamond Prices Comparison
As of May 2026, 8.5 carat radiant lab grown diamonds usually range from $1,258 to $28,888, with an average price of $6,192.In the last month, prices for these diamonds are down 7.9%.Compare 33 verified listings across 4 retailers tracked by CaratRadar.
8.5 Carat Radiant Lab Grown Diamond Market Overview
CaratRadar currently tracks 33 verified 8.5-carat radiant lab grown diamonds listed across 4 online retailers. Prices in this segment range from $1,258 to $28,888, with an average asking price of $6,192 and a median of $4,532.
The price spread of $27,630 (95.6% 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.
33 diamonds tracked in this segment
Price range: $1,258 to $28,888
Average price: $6,192
Median price: $4,532
Available across 4 retailers
Savings potential: up to 95.6%
Price Range Overview
As of May 29, 2026Real market range for this carat, shape, and diamond type.
33
$1,258
$6,192
$4,532
$28,888
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 72.8%IGI | 8.53ct | Radiant | H | VVS2 | Ideal
From $1,500
Compare at $5,505
Save 75%IGI | 8.57ct | Radiant | F | VVS2 | Excellent
From $1,505
Compare at $6,027
Save 78.8%IGI | 8.54ct | Radiant | F | VVS2 | Ideal
From $1,632
Compare at $7,685
Save 77.6%IGI | 8.53ct | Radiant | G | VVS2 | Very Good
From $1,636
Compare at $7,289
Save 78.8%IGI | 8.57ct | Radiant | F | VS1 | Excellent
From $1,638
Compare at $7,713
Save 74.9%IGI | 8.5ct | Radiant | G | VVS2 | Very Good
From $1,695
Compare at $6,751
Save 72.9%IGI | 8.55ct | Radiant | E | VVS2 | Ideal
From $1,740
Compare at $6,416
Save 72.9%IGI | 8.56ct | Radiant | E | VVS2 | Excellent
From $1,742
Compare at $6,431
Save 72.8%IGI | 8.59ct | Radiant | E | VVS2 | Excellent
From $1,764
Compare at $6,477
Save 79.9%IGI | 8.59ct | Radiant | E | VVS2 | Very Good
From $1,767
Compare at $8,790
Save 72.2%IGI | 8.55ct | Radiant | E | VVS2 | Ideal
From $1,811
Compare at $6,508
Save 71.8%IGI | 8.51ct | Radiant | E | VVS2 | Excellent
From $1,813
Compare at $6,435
Save 72.3%IGI | 8.58ct | Radiant | E | VVS2 | Ideal
From $1,817
Compare at $6,551
Save 68.9%IGI | 8.53ct | Radiant | F | VVS2 | Very Good
From $1,882
Compare at $6,055
Save 69.6%IGI | 8.54ct | Radiant | F | VS1 | Very Good
From $1,884
Compare at $6,207
Save 35.4%IGI | 8.54ct | Radiant | H | VS1 | Excellent
From $1,885
Compare at $2,917
Save 67.9%IGI | 8.54ct | Radiant | E | VS1 | Ideal
From $1,956
Compare at $6,097
Save 32.8%IGI | 8.53ct | Radiant | G | VS1 | Excellent
From $1,985
Compare at $2,956
Save 63.8%IGI | 8.57ct | Radiant | G | VS2 | Very Good
From $2,002
Compare at $5,530
Save 68.8%IGI | 8.58ct | Radiant | E | VVS2 | Very Good
From $2,048
Compare at $6,554
Save 63.2%IGI | 8.54ct | Radiant | F | VS1 | Ideal
From $2,259
Compare at $6,145
Save 63.2%IGI | 8.58ct | Radiant | F | VS1 | Ideal
From $2,269
Compare at $6,175
Save 62.7%IGI | 8.51ct | Radiant | I | VS2 | Ideal
From $2,373
Compare at $6,370
Save 72.1%IGI | 8.56ct | Radiant | F | VS2 | Very Good
From $2,419
Compare at $8,687
Save 76.1%IGI | 8.55ct | Radiant | F | VVS2 | Very Good
From $2,556
Compare at $10,700
Save 56.7%IGI | 8.59ct | Radiant | F | VVS2 | Ideal
From $2,652
Compare at $6,132
Save 49.1%IGI | 8.55ct | Radiant | F | VVS2 | Excellent
From $3,154
Compare at $6,192
Save 71.4%IGI | 8.51ct | Radiant | F | VS2 | Very Good
From $3,742
Compare at $13,100
Save 71.4%IGI | 8.5ct | Radiant | F | VS1 | Very Good
From $3,916
Compare at $13,670
Save 71.4%IGI | 8.55ct | Radiant | F | VVS2 | Very Good
From $3,939
Compare at $13,750
Save 71.3%IGI | 8.59ct | Radiant | F | VVS2 | Very Good
From $3,957
Compare at $13,810
Save 70.7%GIA | 8.51ct | Radiant | F | VS2 | Ideal
From $4,499
Compare at $15,350
Save 77.7%IGI | 8.51ct | Radiant | FANCY | VVS2 | Excellent
From $5,137
Compare at $23,053
Entry pricing in this category starts around $1,258.
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 $27,630 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 $4,532 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 33 comparable stones in this segment. Prices start around $1,258 and go up to $28,888.
Based on the latest market data, the average asking price is about $6,192 with a median around $4,532.
The observed spread is roughly $27,630 across tracked listings, which is about 95.6% from highest to lowest offer in this bucket.
We refresh pricing data daily so these pages stay current with market changes.
Based on completed market data, the fair market benchmark is $6,192. The median price is $4,532, so offers between the median and fair benchmark can be reasonable, while reputable listings below the median may be especially competitive.
We currently track this stone category across 4 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 $27,630 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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