8 Carat Lab Grown Diamond Prices Comparison
An 8 carat lab grown diamond of any shape typically costs $3,592 (median of 7,009 listings at 17 online stores). Average prices fell 3% over the last month. Updated .
Average $4,858. Listings run from $570 to $128,648 in the 8.00–8.99 carat range.
See the live listings8 Carat Lab Grown Diamond Market Overview
CaratRadar currently tracks 7,009 verified 8-carat lab grown diamonds in the 8.00–8.99 carat benchmark range, listed across 17 online retailers. Prices in this segment range from $570 to $128,648, with an average asking price of $4,858 and a median of $3,592.
Across this category, asking prices span $128,078 (99.6% 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.
7,009 diamonds tracked in the 8.00–8.99 carat benchmark
Price range: $570 to $128,648
Average price: $4,858
Median price: $3,592
Available across 17 retailers
Category price spread: 99.6%
Price Range Overview
As of Oct 23, 2026Real market range for this carat, shape, and diamond type.
7,009
$570
$4,858
$3,592
$128,648
Price History
Price Comparison Matrix
8 Carat Lab Grown Diamond Prices by Shape
Shape-level averages for this carat and type. Open each shape page for full market detail.
Compare nearby
Prices for the next carat weights, other shapes and the natural twin.
Nearby carat weights
Same size, natural
Live Listings
See all listingsCompare current retailer offers in the same benchmark range and open any listing for full details.
Save 78.5%IGI | 8.13ct | Emerald | H | SI2 | Ideal
From $943
Compare at $4,380
Save 73.3%IGI | 8.02ct | Emerald | G | VS2 | Ideal
From $1,005
Compare at $3,768
Save 79.8%IGI | 8.13ct | Radiant | H | VS2 | Ideal
From $1,029
Compare at $5,100
Save 68.7%IGI | 8.01ct | Round | F | SI1 | Excellent
From $1,042
Compare at $3,330
Save 55%IGI | 8.61ct | Emerald | G | VVS2 | Ideal
From $1,073
Compare at $2,386
Save 79.9%IGI | 8.66ct | Radiant | H | VS2 | Ideal
From $1,094
Compare at $5,430
Save 79%IGI | 8.02ct | Oval | H | VS2 | Ideal
From $1,096
Compare at $5,211
Save 74.7%IGI | 8.01ct | Emerald | G | VVS2 | Excellent
From $1,106
Compare at $4,377
Save 74.5%IGI | 8.07ct | Emerald | G | VVS2 | Very Good
From $1,133
Compare at $4,445
Save 79.3%IGI | 8.05ct | Pear | F | VS1 | Very Good
From $1,145
Compare at $5,529
Save 79.3%IGI | 8.52ct | Radiant | G | VS1 | Excellent
From $1,162
Compare at $5,610
Save 71.3%IGI | 8.02ct | Round | F | VS2 | Excellent
From $1,164
Compare at $4,062
Save 76.2%IGI | 8.03ct | Princess | H | SI1 | Ideal
From $1,175
Compare at $4,940
Save 77.9%IGI | 8.01ct | Marquise | H | VS2 | Ideal
From $1,175
Compare at $5,310
Save 67.8%IGI | 8.01ct | Emerald | H | VS1 | Ideal
From $1,175
Compare at $3,644
Save 71.4%IGI | 8ct | Oval | F | VS1 | Very Good
From $1,187
Compare at $4,151
Save 79.4%IGI | 8.02ct | Emerald | H | VS1 | Ideal
From $1,192
Compare at $5,790
Save 71.6%IGI | 8.05ct | Oval | F | VS1 | Very Good
From $1,195
Compare at $4,201
Save 71%IGI | 8.01ct | Round | F | VS1 | Ideal
From $1,197
Compare at $4,128
Save 71.5%IGI | 8.09ct | Round | F | VS1 | Excellent
From $1,197
Compare at $4,200
Save 79.3%IGI | 8.02ct | Oval | F | VS1 | Excellent
From $1,202
Compare at $5,801
Save 71.7%IGI | 8.09ct | Oval | F | VS1 | Very Good
From $1,202
Compare at $4,241
Save 71.1%IGI | 8.01ct | Oval | F | VS1 | Very Good
From $1,202
Compare at $4,165
Save 71.5%IGI | 8.07ct | Oval | F | VS1 | Very Good
From $1,202
Compare at $4,222
Save 71.5%IGI | 8.07ct | Oval | F | VS1 | Very Good
From $1,202
Compare at $4,222
Save 71.7%IGI | 8.09ct | Oval | F | VS1 | Very Good
From $1,202
Compare at $4,241
Save 71.7%IGI | 8.09ct | Oval | F | VS1 | Very Good
From $1,202
Compare at $4,241
Save 71.1%IGI | 8.04ct | Round | F | VS1 | Ideal
From $1,203
Compare at $4,159
Save 70.9%IGI | 8.02ct | Round | F | VS1 | Ideal
From $1,203
Compare at $4,140
Save 71.1%IGI | 8.04ct | Round | F | VS1 | Ideal
From $1,203
Compare at $4,159
Save 70.9%IGI | 8.02ct | Round | F | VS1 | Excellent
From $1,203
Compare at $4,140
Save 71%IGI | 8.03ct | Round | F | VS1 | Excellent
From $1,203
Compare at $4,149
Save 71%IGI | 8.03ct | Round | F | VS1 | Excellent
From $1,203
Compare at $4,149
Save 71.5%IGI | 8.11ct | Round | F | VS1 | Excellent
From $1,203
Compare at $4,224
Save 71.3%IGI | 8.08ct | Round | F | VS1 | Excellent
From $1,203
Compare at $4,196
Save 71.2%IGI | 8.06ct | Round | F | VS1 | Excellent
From $1,203
Compare at $4,177
Save 70.9%IGI | 8.02ct | Round | F | VS1 | Excellent
From $1,203
Compare at $4,140
Save 70.9%IGI | 8.02ct | Round | F | VS1 | Excellent
From $1,203
Compare at $4,140
Save 71.3%IGI | 8.08ct | Round | F | VS1 | Excellent
From $1,203
Compare at $4,196
Save 70.8%IGI | 8.01ct | Round | F | VS1 | Excellent
From $1,204
Compare at $4,130
Save 71.4%IGI | 8.01ct | Radiant | H | VVS2 | Excellent
From $1,206
Compare at $4,210
Save 77.3%IGI | 8.04ct | Marquise | H | VS2 | Ideal
From $1,210
Compare at $5,330
Save 73.3%IGI | 8.1ct | Oval | F | VVS2 | Excellent
From $1,212
Compare at $4,534
Save 73%IGI | 8.06ct | Oval | F | VVS2 | Excellent
From $1,212
Compare at $4,492
Save 72.8%IGI | 8.03ct | Oval | F | VVS2 | Excellent
From $1,212
Compare at $4,461
Save 68.3%IGI | 8.04ct | Radiant | G | VS1 | Very Good
From $1,215
Compare at $3,828
Save 70.7%IGI | 8.04ct | Round | F | VVS2 | Excellent
From $1,223
Compare at $4,175
Save 70.4%IGI | 8ct | Round | F | VVS2 | Excellent
From $1,223
Compare at $4,137
Save 70.5%IGI | 8.01ct | Round | F | VVS2 | Excellent
From $1,223
Compare at $4,146
Save 70.6%IGI | 8.01ct | Emerald | F | VS1 | Ideal
From $1,225
Compare at $4,167
Entry pricing in this benchmark range starts around $570.
What to Know When Shopping for 8 Carat 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 $128,078 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 $3,592 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.
Frequently Asked Questions
We currently track 7,009 comparable stones in the 8.00–8.99 carat benchmark range. Prices start around $570 and go up to $128,648.
Based on the latest market data, the average asking price is about $4,858 with a median around $3,592.
The observed spread is roughly $128,078 across tracked listings, which is about 99.6% 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 $4,858. The median price is $3,592, 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 17 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 $128,078 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 all-shape diamond benchmark.