6.6 Carat Cushion Lab Grown Diamond Prices Comparison
As of April 2026, 6.6 carat cushion lab grown diamonds usually range from $920 to $62,648, with an average price of $6,272.In the last month, prices for these diamonds are up 0.3%.Compare 53 verified listings across 4 retailers tracked by CaratRadar.
6.6 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 53 verified 6.6-carat cushion lab grown diamonds listed across 4 online retailers. Prices in this segment range from $920 to $62,648, with an average asking price of $6,272 and a median of $4,265.
The price spread of $61,728 (98.5% 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.
53 diamonds tracked in this segment
Price range: $920 to $62,648
Average price: $6,272
Median price: $4,265
Available across 4 retailers
Savings potential: up to 98.5%
Price Range Overview
As of Apr 14, 2026Real market range for this carat, shape, and diamond type.
53
$920
$6,272
$4,265
$62,648
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 64.5%GIA | 6.6ct | Cushion | E | VVS2 | Ideal
From $16,570
Compare at $46,720
Save 69.6%IGI | 6.6ct | Cushion | G | VS1 | Ideal
From $2,066
Compare at $6,800
Save 29.5%IGI | 6.6ct | Cushion | E | VVS2 | Very Good
From $1,767
Compare at $2,506
Save 81.6%IGI | 6.6ct | Cushion | G | VVS2 | Very Good
From $2,395
Compare at $13,030
Save 29.5%IGI | 6.6ct | Cushion | E | VVS2 | Very Good
From $1,767
Compare at $2,506
Save 42.7%IGI | 6.6ct | Cushion | E | VVS2 | Very Good
From $1,767
Compare at $3,085
Save 71.3%IGI | 6.61ct | Cushion | G | VS1 | Ideal
From $2,928
Compare at $10,220
Save 71.3%IGI | 6.61ct | Cushion | G | VS1 | Ideal
From $2,928
Compare at $10,220
Save 69.7%IGI | 6.61ct | Cushion | E | VVS2 | Excellent
From $2,936
Compare at $9,700
Save 14.7%IGI | 6.61ct | Cushion | E | VS1 | Ideal
From $10,077
Compare at $11,815
Save 71.6%IGI | 6.62ct | Cushion | G | VS1 | Ideal
From $2,072
Compare at $7,300
Save 76.1%IGI | 6.62ct | Cushion | G | VS2 | Very Good
From $1,863
Compare at $7,780
Save 67.8%IGI | 6.62ct | Cushion | E | VS2 | Ideal
From $1,725
Compare at $5,360
Save 84.1%IGI | 6.62ct | Cushion | E | VS1 | Ideal
From $2,615
Compare at $16,460
Save 71.4%IGI | 6.63ct | Cushion | G | VS1 | Ideal
From $2,937
Compare at $10,250
Save 78.7%IGI | 6.63ct | Cushion | E | VVS2 | Very Good
From $3,554
Compare at $16,650
IGI | 6.63ct | Cushion | F | VVS1 | Ideal
From $4,104
Compare at $4,105
Save 82.4%IGI | 6.63ct | Cushion | E | VVS2 | Ideal
From $2,945
Compare at $16,770
Save 86.5%IGI | 6.64ct | Cushion | F | VVS2 | Good
From $2,005
Compare at $14,880
Save 42.7%IGI | 6.64ct | Cushion | E | VVS2 | Very Good
From $1,778
Compare at $3,103
Save 28.7%IGI | 6.64ct | Cushion | E | VS1 | Very Good
From $1,700
Compare at $2,384
Save 76%IGI | 6.65ct | Cushion | D | VS1 | Excellent
From $4,090
Compare at $17,050
GIA | 6.66ct | Cushion | F | VS1 | Ideal
From $13,830
Compare at $14,985
Save 78%IGI | 6.66ct | Cushion | E | VVS2 | Ideal
From $3,683
Compare at $16,720
Save 82.4%IGI | 6.66ct | Cushion | E | VVS2 | Very Good
From $2,958
Compare at $16,840
Save 79.9%IGI | 6.66ct | Cushion | E | VS1 | Ideal
From $3,335
Compare at $16,550
Save 82.7%IGI | 6.66ct | Cushion | E | VVS2 | Ideal
From $2,922
Compare at $16,870
Save 84.8%IGI | 6.66ct | Cushion | F | VVS2 | Ideal
From $2,273
Compare at $14,960
Save 84.2%IGI | 6.66ct | Cushion | F | VVS2 | Ideal
From $2,353
Compare at $14,940
Save 42.7%IGI | 6.67ct | Cushion | E | VVS2 | Very Good
From $1,786
Compare at $3,117
Save 81.5%IGI | 6.67ct | Cushion | E | VS2 | Ideal
From $2,466
Compare at $13,300
Save 29.5%IGI | 6.67ct | Cushion | E | VVS2 | Very Good
From $1,786
Compare at $2,532
Save 42.7%IGI | 6.67ct | Cushion | E | VVS2 | Very Good
From $1,786
Compare at $3,117
Save 73.4%IGI | 6.68ct | Cushion | G | VS1 | Ideal
From $2,091
Compare at $7,850
Save 67.8%IGI | 6.68ct | Cushion | E | VS2 | Ideal
From $1,740
Compare at $5,410
Save 66.1%IGI | 6.68ct | Cushion | F | VS2 | Ideal
From $1,720
Compare at $5,075
Save 29.5%IGI | 6.68ct | Cushion | E | VVS2 | Very Good
From $1,789
Compare at $2,536
Save 71.4%IGI | 6.69ct | Cushion | G | VS1 | Ideal
From $2,962
Compare at $10,340
Save 67%IGI | 6.69ct | Cushion | E | VS1 | Ideal
From $1,898
Compare at $5,750
Save 66.9%IGI | 6.69ct | Cushion | D | VS2 | Ideal
From $2,238
Compare at $6,755
Save 67%IGI | 6.69ct | Cushion | E | VS1 | Ideal
From $1,898
Compare at $5,750
Save 29.5%IGI | 6.69ct | Cushion | E | VVS2 | Very Good
From $1,791
Compare at $2,540
Save 28.7%IGI | 6.69ct | Cushion | E | VS1 | Very Good
From $1,733
Compare at $2,430
Save 74.9%IGI | 6.7ct | Cushion | G | VS1 | Ideal
From $2,967
Compare at $11,810
Save 13.4%IGI | 6.7ct | Cushion | F | VS2 | Very Good
From $1,965
Compare at $2,269
Save 43.7%IGI | 6.7ct | Cushion | F | VS1 | Ideal
From $2,003
Compare at $3,560
Save 73%IGI | 6.7ct | Cushion | G | VVS2 | Very Good
From $5,945
Compare at $22,040
Save 81.2%IGI | 6.7ct | Cushion | D | VS1 | Ideal
From $3,231
Compare at $17,180
Save 28.7%IGI | 6.7ct | Cushion | E | VS1 | Very Good
From $1,716
Compare at $2,406
Save 29.5%IGI | 6.7ct | Cushion | E | VVS2 | Very Good
From $1,794
Compare at $2,544
Entry pricing in this category starts around $920.
What to Know When Shopping for 6.6 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $61,728 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 $4,265 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 53 comparable stones in this segment. Prices start around $920 and go up to $62,648.
Based on the latest market data, the average asking price is about $6,272 with a median around $4,265.
The observed spread is roughly $61,728 across tracked listings, which is about 98.5% 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 $4,265, 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 4 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 $61,728 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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