6.8 Carat Cushion Lab Grown Diamond Prices Comparison
As of April 2026, 6.8 carat cushion lab grown diamonds usually range from $1,185 to $26,947, with an average price of $4,976.In the last month, prices for these diamonds are up 0.6%.Compare 39 verified listings across 2 retailers tracked by CaratRadar.
6.8 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 39 verified 6.8-carat cushion lab grown diamonds listed across 2 online retailers. Prices in this segment range from $1,185 to $26,947, with an average asking price of $4,976 and a median of $3,452.
The price spread of $25,762 (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.
39 diamonds tracked in this segment
Price range: $1,185 to $26,947
Average price: $4,976
Median price: $3,452
Available across 2 retailers
Savings potential: up to 95.6%
Price Range Overview
As of Apr 13, 2026Real market range for this carat, shape, and diamond type.
39
$1,185
$4,976
$3,452
$26,947
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 65.9%GIA | 6.8ct | Cushion | G | VS1 | Excellent
From $6,786
Compare at $19,880
Save 71.5%IGI | 6.8ct | Cushion | E | VVS2 | Very Good
From $3,422
Compare at $11,990
Save 29.5%IGI | 6.8ct | Cushion | E | VVS2 | Very Good
From $1,821
Compare at $2,582
Save 29.5%IGI | 6.8ct | Cushion | E | VVS2 | Very Good
From $1,821
Compare at $2,582
Save 29.5%IGI | 6.81ct | Cushion | E | VVS2 | Very Good
From $1,823
Compare at $2,586
Save 29.5%IGI | 6.81ct | Cushion | E | VVS2 | Very Good
From $1,823
Compare at $2,586
IGI | 6.82ct | Cushion | G | VS1 | Ideal
From $3,575
Compare at $3,951
Save 29.5%IGI | 6.82ct | Cushion | E | VVS2 | Very Good
From $1,826
Compare at $2,589
Save 28.7%IGI | 6.82ct | Cushion | E | VS1 | Very Good
From $1,766
Compare at $2,477
Save 29.5%IGI | 6.82ct | Cushion | E | VVS2 | Very Good
From $1,846
Compare at $2,617
Save 28.7%IGI | 6.82ct | Cushion | F | VVS2 | Very Good
From $1,626
Compare at $2,280
Save 29.5%IGI | 6.82ct | Cushion | E | VVS2 | Very Good
From $1,846
Compare at $2,617
Save 26.4%GIA | 6.83ct | Cushion | E | IF | Ideal
From $23,324
Compare at $31,670
Save 84.7%IGI | 6.83ct | Cushion | E | VS1 | Ideal
From $2,617
Compare at $17,090
Save 71.5%IGI | 6.83ct | Cushion | D | VVS2 | Very Good
From $3,669
Compare at $12,860
Save 28.7%IGI | 6.83ct | Cushion | F | VVS2 | Excellent
From $1,629
Compare at $2,283
Save 77.1%IGI | 6.83ct | Cushion | E | VS1 | Very Good
From $1,891
Compare at $8,260
Save 28.7%IGI | 6.83ct | Cushion | E | VS1 | Very Good
From $1,749
Compare at $2,452
Save 29.5%IGI | 6.83ct | Cushion | E | VVS2 | Very Good
From $1,829
Compare at $2,593
Save 29.5%IGI | 6.83ct | Cushion | E | VVS2 | Very Good
From $1,829
Compare at $2,593
Save 29.5%IGI | 6.84ct | Cushion | E | VVS2 | Very Good
From $1,831
Compare at $2,597
Save 77.1%IGI | 6.84ct | Cushion | E | VS1 | Very Good
From $1,893
Compare at $8,270
Save 70.3%IGI | 6.85ct | Cushion | G | VS1 | Very Good
From $3,042
Compare at $10,250
Save 67.8%IGI | 6.85ct | Cushion | E | VS2 | Ideal
From $1,784
Compare at $5,545
Save 29.5%IGI | 6.85ct | Cushion | E | VVS2 | Very Good
From $1,834
Compare at $2,601
Save 77.1%IGI | 6.85ct | Cushion | E | VS1 | Very Good
From $1,896
Compare at $8,280
Save 29.5%IGI | 6.85ct | Cushion | E | VVS2 | Very Good
From $1,834
Compare at $2,601
Save 75.9%IGI | 6.86ct | Cushion | F | VVS2 | Excellent
From $1,857
Compare at $7,710
Save 29.5%IGI | 6.86ct | Cushion | E | VVS2 | Very Good
From $1,836
Compare at $2,605
Save 29.5%IGI | 6.86ct | Cushion | E | VVS2 | Very Good
From $1,836
Compare at $2,605
Save 75.5%IGI | 6.86ct | Cushion | F | VS1 | Very Good
From $1,848
Compare at $7,540
Save 29.5%IGI | 6.86ct | Cushion | E | VVS2 | Very Good
From $1,836
Compare at $2,605
Save 83.5%IGI | 6.86ct | Cushion | F | VS1 | Ideal
From $2,349
Compare at $14,210
Save 29.5%IGI | 6.87ct | Cushion | E | VVS2 | Very Good
From $1,839
Compare at $2,608
Save 29.5%IGI | 6.87ct | Cushion | E | VVS2 | Very Good
From $1,839
Compare at $2,608
Save 29.5%IGI | 6.87ct | Cushion | E | VVS2 | Very Good
From $1,839
Compare at $2,608
Save 75.9%IGI | 6.88ct | Cushion | F | VVS2 | Excellent
From $1,842
Compare at $7,640
Save 29.5%IGI | 6.9ct | Cushion | E | VVS2 | Very Good
From $1,847
Compare at $2,620
Save 77.1%IGI | 6.9ct | Cushion | E | VS1 | Very Good
From $1,910
Compare at $8,340
Entry pricing in this category starts around $1,185.
What to Know When Shopping for 6.8 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $25,762 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 $3,452 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 39 comparable stones in this segment. Prices start around $1,185 and go up to $26,947.
Based on the latest market data, the average asking price is about $4,976 with a median around $3,452.
The observed spread is roughly $25,762 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 our data, the median price is $3,452, 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 2 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 $25,762 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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