8 Carat Cushion Lab Grown Diamond Prices Comparison
As of October 2026, 8 carat cushion lab grown diamonds in the 8.00–8.99 carat benchmark range usually range from $735 to $128,648, with an average price of $6,044.In the last month, prices for these diamonds are up 1.1%.Compare 522 verified listings across 12 retailers tracked by CaratRadar.
8 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 522 verified 8-carat cushion lab grown diamonds in the 8.00–8.99 carat benchmark range, listed across 12 online retailers. Prices in this segment range from $735 to $128,648, with an average asking price of $6,044 and a median of $4,598.
The price spread of $127,913 (99.4% 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 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.
522 diamonds tracked in the 8.00–8.99 carat benchmark
Price range: $735 to $128,648
Average price: $6,044
Median price: $4,598
Available across 12 retailers
Savings potential: up to 99.4%
Price Range Overview
As of Oct 14, 2026Real market range for this carat, shape, and diamond type.
522
$735
$6,044
$4,598
$128,648
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers in the same benchmark range and open any listing for full details.
Save 70.8%IGI | 8.03ct | Cushion | H | VVS2 | Very Good
From $1,244
Compare at $4,256
Save 69.6%IGI | 8.07ct | Cushion | F | VS1 | Very Good
From $1,298
Compare at $4,272
Save 73.9%IGI | 8.03ct | Cushion | F | VS1 | Ideal
From $1,319
Compare at $5,061
Save 75%IGI | 8.35ct | Cushion | H | VS2 | Ideal
From $1,339
Compare at $5,360
Save 68.8%IGI | 8.07ct | Cushion | F | VS1 | Excellent
From $1,339
Compare at $4,288
Save 74%IGI | 8.03ct | Cushion | F | VVS2 | Very Good
From $1,359
Compare at $5,218
Save 74%IGI | 8.03ct | Cushion | F | VVS2 | Ideal
From $1,359
Compare at $5,218
Save 70%IGI | 8.04ct | Cushion | F | VVS2 | Excellent
From $1,361
Compare at $4,536
Save 73.9%IGI | 8.05ct | Cushion | F | VVS2 | Ideal
From $1,363
Compare at $5,231
Save 70%IGI | 8.05ct | Cushion | G | VVS2 | Very Good
From $1,363
Compare at $4,546
Save 73.9%IGI | 8.05ct | Cushion | F | VVS2 | Good
From $1,363
Compare at $5,231
Save 75.1%IGI | 8.54ct | Cushion | H | VS2 | Ideal
From $1,368
Compare at $5,490
Save 70.3%IGI | 8.08ct | Cushion | F | VVS2 | Good
From $1,368
Compare at $4,612
Save 64.4%IGI | 8.03ct | Cushion | G | VS1 | Very Good
From $1,386
Compare at $3,892
Save 69.3%IGI | 8.04ct | Cushion | E | VS1 | Very Good
From $1,388
Compare at $4,524
Save 74%IGI | 8.53ct | Cushion | F | VVS2 | Very Good
From $1,402
Compare at $5,383
Save 74%IGI | 8.01ct | Cushion | F | VVS2 | Very Good
From $1,410
Compare at $5,413
Save 74%IGI | 8.59ct | Cushion | F | VVS2 | Ideal
From $1,412
Compare at $5,421
Save 79.7%IGI | 8.03ct | Cushion | G | VS1 | Excellent
From $1,414
Compare at $6,950
Save 73.9%IGI | 8.55ct | Cushion | E | VS1 | Ideal
From $1,420
Compare at $5,450
Save 74%IGI | 8.59ct | Cushion | E | VS1 | Very Good
From $1,426
Compare at $5,475
Save 74%IGI | 8.09ct | Cushion | F | VVS2 | Excellent
From $1,437
Compare at $5,520
Save 75.2%IGI | 8.55ct | Cushion | F | VS1 | Excellent
From $1,439
Compare at $5,794
Save 73.9%IGI | 8.03ct | Cushion | E | VS1 | Very Good
From $1,441
Compare at $5,531
Save 73.9%IGI | 8.03ct | Cushion | E | VS1 | Very Good
From $1,441
Compare at $5,531
Save 79.2%IGI | 8.01ct | Cushion | G | VS1 | Very Good
From $1,442
Compare at $6,940
Save 64.5%IGI | 8.07ct | Cushion | F | VS2 | Excellent
From $1,452
Compare at $4,089
Save 79%IGI | 8.02ct | Cushion | G | VS1 | Ideal
From $1,459
Compare at $6,950
Save 78%IGI | 8.38ct | Cushion | G | VS2 | Ideal
From $1,474
Compare at $6,690
Save 68.6%IGI | 8.24ct | Cushion | F | VVS2 | Excellent
From $1,482
Compare at $4,724
Save 76.7%IGI | 8.01ct | Cushion | G | VS2 | Ideal
From $1,489
Compare at $6,400
Save 64.5%IGI | 8.2ct | Cushion | F | VS2 | Ideal
From $1,491
Compare at $4,199
Save 76.7%IGI | 8.03ct | Cushion | G | VS2 | Ideal
From $1,493
Compare at $6,410
Save 68%IGI | 8.57ct | Cushion | F | VS2 | Very Good
From $1,493
Compare at $4,659
Save 76.5%IGI | 8.52ct | Cushion | H | VS1 | Ideal
From $1,494
Compare at $6,350
Save 71.4%IGI | 8.13ct | Cushion | H | VS2 | Ideal
From $1,494
Compare at $5,230
Save 74%IGI | 8.03ct | Cushion | E | VVS2 | Excellent
From $1,494
Compare at $5,740
Save 74%IGI | 8.03ct | Cushion | E | VVS2 | Ideal
From $1,494
Compare at $5,740
Save 75.1%IGI | 8.63ct | Cushion | F | VVS2 | Very Good
From $1,497
Compare at $6,006
Save 73.9%IGI | 8.05ct | Cushion | E | VVS2 | Ideal
From $1,499
Compare at $5,754
Save 78.8%IGI | 8ct | Cushion | E | VS2 | Good
From $1,499
Compare at $7,070
Save 78.3%IGI | 8ct | Cushion | G | VS1 | Ideal
From $1,503
Compare at $6,930
Save 76.7%IGI | 8.11ct | Cushion | G | VS2 | Ideal
From $1,507
Compare at $6,480
Save 78.3%IGI | 8.03ct | Cushion | G | VS1 | Very Good
From $1,508
Compare at $6,960
Save 61.5%IGI | 8.06ct | Cushion | G | VS1 | Very Good
From $1,508
Compare at $3,919
Save 76.7%IGI | 8.16ct | Cushion | G | VS2 | Ideal
From $1,516
Compare at $6,510
Save 64.3%IGI | 8.02ct | Cushion | G | VS1 | Very Good
From $1,517
Compare at $4,244
Save 75.4%IGI | 8.05ct | Cushion | E | VVS2 | Very Good
From $1,520
Compare at $6,173
Save 75.4%IGI | 8.07ct | Cushion | E | VVS2 | Very Good
From $1,523
Compare at $6,188
Save 61.2%IGI | 8.03ct | Cushion | G | VS1 | Very Good
From $1,524
Compare at $3,926
Entry pricing in this benchmark range starts around $735.
What to Know When Shopping for 8 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $127,913 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 $4,598 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.
- Cushion cuts come in standard and modified brilliant varieties. Modified brilliants tend to show more fire, while standard cushions have broader facets.
Frequently Asked Questions
We currently track 522 comparable stones in the 8.00–8.99 carat benchmark range. Prices start around $735 and go up to $128,648.
Based on the latest market data, the average asking price is about $6,044 with a median around $4,598.
The observed spread is roughly $127,913 across tracked listings, which is about 99.4% 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 $6,044. The median price is $4,598, 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 12 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 $127,913 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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Tracking Lab Grown inventory for the 8.00–8.99 carat Cushion diamond benchmark.