8.5 Carat Radiant Lab Grown Diamond Prices Comparison
As of February 2026, 8.5 carat radiant lab grown diamonds usually range from $1,638 to $15,380, with an average price of $3,041.In the last month, prices for these diamonds are down 1.4%.Compare 87 verified listings across 6 retailers tracked by CaratRadar.
8.5 Carat Radiant Lab Grown Diamond Market Overview
CaratRadar currently tracks 87 verified 8.5-carat radiant lab grown diamonds listed across 6 online retailers. Prices in this segment range from $1,638 to $15,380, with an average asking price of $3,041 and a median of $2,402.
The price spread of $13,742 (89.3% 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.
87 diamonds tracked in this segment
Price range: $1,638 to $15,380
Average price: $3,041
Median price: $2,402
Available across 6 retailers
Savings potential: up to 89.3%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
87
$1,638
$3,041
$2,402
$15,380
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 91%8.45ct | Radiant | F | VVS2 | Excellent
From $2,066
Compare at $22,980
IGISave 85%8.45ct | Radiant | E | VS1 | Very Good
From $1,952
Compare at $13,020
GIASave 69.4%8.45ct | Radiant | F | VVS2 | Very Good
From $10,347
Compare at $33,800
IGISave 87.6%8.45ct | Radiant | E | VVS2 | Ideal
From $2,474
Compare at $19,900
IGISave 72%8.46ct | Radiant | F | VVS2 | Ideal
From $2,523
Compare at $9,010
IGISave 76.3%8.46ct | Radiant | F | VVS2 | Ideal
From $2,043
Compare at $8,625
IGISave 78.9%8.47ct | Radiant | E | VS2 | Ideal
From $2,321
Compare at $11,000
IGISave 81.6%8.47ct | Radiant | E | VS1 | Very Good
From $3,155
Compare at $17,190
IGISave 86.9%8.47ct | Radiant | E | VS1 | Ideal
From $2,526
Compare at $19,220
IGISave 79.4%8.47ct | Radiant | F | VVS2 | Ideal
From $1,831
Compare at $8,890
IGISave 60.6%8.47ct | Radiant | FANCY | VS1 | Excellent
From $8,623
Compare at $21,862
IGISave 84%8.47ct | Radiant | F | VVS2 | Ideal
From $1,776
Compare at $11,070
IGISave 71.9%8.47ct | Radiant | E | VVS2 | Ideal
From $2,826
Compare at $10,050
IGISave 86.3%8.48ct | Radiant | G | VS1 | Ideal
From $2,462
Compare at $17,950
IGISave 76.3%8.48ct | Radiant | F | VVS2 | Ideal
From $2,048
Compare at $8,645
IGISave 81.8%8.48ct | Radiant | F | VS1 | Very Good
From $3,060
Compare at $16,850
IGISave 85.3%8.48ct | Radiant | E | VVS2 | Ideal
From $2,483
Compare at $16,880
IGISave 91.1%8.48ct | Radiant | E | VS1 | Excellent
From $2,156
Compare at $24,130
IGISave 82.4%8.49ct | Radiant | D | VS1 | Ideal
From $3,829
Compare at $21,770
IGISave 78.3%8.49ct | Radiant | F | VS1 | Ideal
From $2,396
Compare at $11,050
IGISave 79.3%8.49ct | Radiant | F | VS2 | Ideal
From $2,373
Compare at $11,480
IGISave 78.4%8.49ct | Radiant | F | VVS1 | Ideal
From $4,693
Compare at $21,720
IGISave 40.8%8.5ct | Radiant | H | VS2 | Very Good
From $1,641
Compare at $2,771
IGISave 61%8.5ct | Radiant | G | SI1 | Ideal
From $3,859
Compare at $9,900
IGISave 89.1%8.5ct | Radiant | F | VVS2 | Excellent
From $2,071
Compare at $19,000
IGISave 61.7%8.5ct | Radiant | G | VS2 | Excellent
From $5,015
Compare at $13,110
IGISave 82.6%8.5ct | Radiant | F | VS1 | Excellent
From $2,537
Compare at $14,610
IGISave 81.8%8.5ct | Radiant | F | VS1 | Very Good
From $3,067
Compare at $16,890
IGISave 89.2%8.5ct | Radiant | F | VVS2 | Ideal
From $2,052
Compare at $19,000
IGISave 89%8.5ct | Radiant | E | VS1 | Ideal
From $2,330
Compare at $21,180
IGISave 88%8.51ct | Radiant | E | VVS2 | Excellent
From $2,942
Compare at $24,500
IGISave 83.8%8.51ct | Radiant | E | VS2 | Excellent
From $2,389
Compare at $14,740
IGISave 43.2%8.51ct | Radiant | I | VS2 | Ideal
From $3,731
Compare at $6,573
IGISave 81.8%8.51ct | Radiant | F | VS2 | Very Good
From $2,947
Compare at $16,170
IGISave 86.3%8.51ct | Radiant | F | VS1 | Ideal
From $2,401
Compare at $17,500
IGISave 71.9%8.51ct | Radiant | E | VVS2 | Ideal
From $2,839
Compare at $10,100
IGISave 86.3%8.51ct | Radiant | G | VS1 | Ideal
From $2,470
Compare at $18,010
GIA8.51ct | Radiant | F | VS2 | Ideal
From $15,380
Compare at $16,935
IGISave 85.7%8.51ct | Radiant | G | VS2 | Ideal
From $2,355
Compare at $16,450
IGISave 60.1%8.51ct | Radiant | FANCY | VVS2 | Excellent
From $10,377
Compare at $26,021
IGISave 86.1%8.51ct | Radiant | G | VVS2 | Excellent
From $2,333
Compare at $16,800
IGISave 73.8%8.52ct | Radiant | G | VS1 | Ideal
From $3,368
Compare at $12,870
IGISave 73.1%8.52ct | Radiant | F | VVS2 | Ideal
From $2,336
Compare at $8,690
IGISave 88.9%8.52ct | Radiant | E | VS2 | Excellent
From $1,884
Compare at $16,930
IGISave 76.3%8.52ct | Radiant | F | VVS2 | Ideal
From $2,056
Compare at $8,690
IGISave 73.1%8.52ct | Radiant | F | VVS2 | Ideal
From $2,336
Compare at $8,690
IGISave 76.3%8.52ct | Radiant | F | VVS2 | Ideal
From $2,056
Compare at $8,690
IGISave 82.6%8.52ct | Radiant | F | VS1 | Excellent
From $2,542
Compare at $14,640
IGISave 88.2%8.52ct | Radiant | F | VVS2 | Ideal
From $2,251
Compare at $19,100
IGISave 90.4%8.52ct | Radiant | F | VVS2 | Excellent
From $2,218
Compare at $23,190
Entry pricing in this category starts around $1,638.
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 $13,742 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 $2,402 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 87 comparable stones in this segment. Prices start around $1,638 and go up to $15,380.
Based on the latest market data, the average asking price is about $3,041 with a median around $2,402.
The observed spread is roughly $13,742 across tracked listings, which is about 89.3% 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 $2,402, 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 $13,742 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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