8 Carat Radiant Lab Grown Diamond Prices Comparison
An 8 carat radiant lab grown diamond typically costs $3,865 (median of 504 listings at 11 online stores), with most between $1,764 and $14,659. Average prices fell 0.9% over the last month. Updated .
Average $5,198. Listings run from $570 to $62,972 in the 8.00–8.99 carat range.
See the live listings8 Carat Radiant Lab Grown Diamond Market Overview
CaratRadar currently tracks 504 verified 8-carat radiant lab grown diamonds in the 8.00–8.99 carat benchmark range, listed across 11 online retailers. Prices in this segment range from $570 to $62,972, with an average asking price of $5,198 and a median of $3,865.
Across this category, asking prices span $62,402 (99.1% from the most expensive to the cheapest listing). The same certified diamond can also be listed at different prices by different retailers, which is why CaratRadar compares stones by certificate number.
These figures use the same benchmark range throughout the page and 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.
504 diamonds tracked in the 8.00–8.99 carat benchmark
Price range: $570 to $62,972
Average price: $5,198
Median price: $3,865
Available across 11 retailers
Category price spread: 99.1%
Price Range Overview
As of Oct 23, 2026Real market range for this carat, shape, and diamond type.
504
$570
$5,198
$3,865
$62,972
Price History
Price Comparison Matrix
Compare nearby
Prices for the next carat weights, other shapes and the natural twin.
Nearby carat weights
Other shapes at 8 carat
- 8 carat round lab grown diamond pricesAverage $4,747
- 8 carat princess lab grown diamond pricesAverage $5,237
- 8 carat cushion lab grown diamond pricesAverage $6,043
- 8 carat oval lab grown diamond pricesAverage $4,541
- 8 carat emerald lab grown diamond pricesAverage $4,378
- 8 carat pear lab grown diamond pricesAverage $4,769
- 8 carat marquise lab grown diamond pricesAverage $4,751
- 8 carat heart lab grown diamond pricesAverage $5,523
Live Listings
See all listingsCompare current retailer offers in the same benchmark range and open any listing for full details.
Save 79.8%IGI | 8.13ct | Radiant | H | VS2 | Ideal
From $1,029
Compare at $5,100
Save 79.9%IGI | 8.66ct | Radiant | H | VS2 | Ideal
From $1,094
Compare at $5,430
Save 79.3%IGI | 8.52ct | Radiant | G | VS1 | Excellent
From $1,162
Compare at $5,610
Save 71.4%IGI | 8.01ct | Radiant | H | VVS2 | Excellent
From $1,206
Compare at $4,210
Save 68.3%IGI | 8.04ct | Radiant | G | VS1 | Very Good
From $1,215
Compare at $3,828
Save 74.1%IGI | 8.53ct | Radiant | H | VVS2 | Ideal
From $1,227
Compare at $4,743
Save 67.6%IGI | 8.07ct | Radiant | G | VS1 | Ideal
From $1,254
Compare at $3,866
Save 70.6%IGI | 8.53ct | Radiant | G | VS1 | Very Good
From $1,257
Compare at $4,269
Save 67.2%IGI | 8.05ct | Radiant | G | VS1 | Excellent
From $1,265
Compare at $3,852
Save 71.8%IGI | 8.08ct | Radiant | G | VVS2 | Excellent
From $1,270
Compare at $4,497
Save 79.3%IGI | 8.08ct | Radiant | FANCY | SI2 | Very Good
From $1,277
Compare at $6,167
Save 79.8%IGI | 8.02ct | Radiant | G | VS2 | Ideal
From $1,296
Compare at $6,400
Save 69.6%IGI | 8.53ct | Radiant | G | VS1 | Excellent
From $1,302
Compare at $4,286
Save 69.2%IGI | 8.04ct | Radiant | F | VS1 | Very Good
From $1,307
Compare at $4,246
Save 73.9%IGI | 8.67ct | Radiant | F | VS1 | Very Good
From $1,322
Compare at $5,071
Save 65.6%IGI | 8.03ct | Radiant | G | VS1 | Excellent
From $1,326
Compare at $3,851
Save 79.2%IGI | 8.18ct | Radiant | H | VS1 | Very Good
From $1,328
Compare at $6,378
Save 73.5%IGI | 8.55ct | Radiant | G | VVS2 | Excellent
From $1,332
Compare at $5,020
Save 65.4%IGI | 8ct | Radiant | G | VS2 | Very Good
From $1,333
Compare at $3,858
Save 77.4%IGI | 8.04ct | Radiant | G | VVS2 | Excellent
From $1,336
Compare at $5,921
Save 73.6%IGI | 8.59ct | Radiant | G | VVS2 | Very Good
From $1,338
Compare at $5,065
Save 73.9%IGI | 8.05ct | Radiant | F | VS1 | Ideal
From $1,363
Compare at $5,231
Save 68.1%IGI | 8.05ct | Radiant | F | VS1 | Ideal
From $1,363
Compare at $4,271
Save 74.3%IGI | 8.77ct | Radiant | F | VVS2 | Excellent
From $1,366
Compare at $5,320
Save 78.6%IGI | 8ct | Radiant | G | VS2 | Ideal
From $1,370
Compare at $6,390
Save 78.6%IGI | 8.11ct | Radiant | G | VS2 | Ideal
From $1,385
Compare at $6,480
Save 69.3%IGI | 8.09ct | Radiant | G | VVS2 | Ideal
From $1,397
Compare at $4,556
Save 67.1%IGI | 8.04ct | Radiant | F | VS1 | Very Good
From $1,398
Compare at $4,250
Save 67.2%IGI | 8.06ct | Radiant | F | VS1 | Very Good
From $1,401
Compare at $4,270
Save 74%IGI | 8.01ct | Radiant | F | VS1 | Ideal
From $1,410
Compare at $5,413
Save 73.9%IGI | 8.03ct | Radiant | F | VVS2 | Excellent
From $1,414
Compare at $5,426
Save 74%IGI | 8.05ct | Radiant | F | VVS2 | Ideal
From $1,417
Compare at $5,441
Save 79.8%IGI | 8.09ct | Radiant | F | VS2 | Ideal
From $1,421
Compare at $7,020
Save 79.4%IGI | 8ct | Radiant | F | VS2 | Very Good
From $1,433
Compare at $6,940
Save 66.6%IGI | 8.08ct | Radiant | F | VS1 | Very Good
From $1,433
Compare at $4,290
Save 74%IGI | 8.07ct | Radiant | F | VVS2 | Excellent
From $1,434
Compare at $5,506
Save 65.1%IGI | 8.06ct | Radiant | F | VS2 | Very Good
From $1,435
Compare at $4,117
Save 74%IGI | 8.05ct | Radiant | F | VVS2 | Ideal
From $1,441
Compare at $5,532
Save 74%IGI | 8.07ct | Radiant | F | VVS2 | Excellent
From $1,444
Compare at $5,546
Save 74%IGI | 8.07ct | Radiant | F | VVS2 | Very Good
From $1,444
Compare at $5,546
Save 68.1%IGI | 8.07ct | Radiant | F | VVS2 | Very Good
From $1,459
Compare at $4,573
Save 66.5%IGI | 8.08ct | Radiant | F | VS1 | Excellent
From $1,460
Compare at $4,362
Save 72.6%IGI | 8.07ct | Radiant | F | VS1 | Very Good
From $1,463
Compare at $5,349
Save 74%IGI | 8.51ct | Radiant | F | VS1 | Ideal
From $1,483
Compare at $5,696
Save 78.7%IGI | 8.05ct | Radiant | F | VS2 | Very Good
From $1,484
Compare at $6,980
Save 74%IGI | 8.57ct | Radiant | F | VS1 | Ideal
From $1,493
Compare at $5,736
Save 74%IGI | 8.59ct | Radiant | F | VS1 | Ideal
From $1,497
Compare at $5,750
Save 74%IGI | 8.59ct | Radiant | F | VS1 | Ideal
From $1,497
Compare at $5,750
Save 79.7%IGI | 8.51ct | Radiant | G | VS1 | Ideal
From $1,500
Compare at $7,380
Save 79.6%IGI | 8.48ct | Radiant | G | VS1 | Ideal
From $1,500
Compare at $7,350
Entry pricing in this benchmark range starts around $570.
What to Know When Shopping for 8 Carat Radiant Lab Grown Diamonds
- Always compare identical certified diamonds across retailers, because the same certificate can be listed at different prices by different stores. Across this whole category, asking prices span $62,402 from the cheapest to the most expensive listing.
- 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 $3,865 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 504 comparable stones in the 8.00–8.99 carat benchmark range. Prices start around $570 and go up to $62,972.
Based on the latest market data, the average asking price is about $5,198 with a median around $3,865.
The observed spread is roughly $62,402 across tracked listings, which is about 99.1% from highest to lowest offer in the 8.00–8.99 carat benchmark range.
We refresh pricing data daily so these pages stay current with market changes.
Based on completed market data, the fair market benchmark is $5,198. The median price is $3,865, 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 11 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. Across this category, asking prices span $62,402 from the cheapest to the most expensive listing, and the same certified diamond can also carry different prices at different 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.
Tools and Guides
Tracking Lab Grown inventory for the 8.00–8.99 carat Radiant diamond benchmark.