6.6 Carat Cushion Lab Grown Diamond Prices Comparison
As of February 2026, 6.6 carat cushion lab grown diamonds usually range from $1,476 to $37,280, with an average price of $3,705.In the last month, prices for these diamonds are down 4.4%.Compare 58 verified listings across 5 retailers tracked by CaratRadar.
6.6 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 58 verified 6.6-carat cushion lab grown diamonds listed across 5 online retailers. Prices in this segment range from $1,476 to $37,280, with an average asking price of $3,705 and a median of $2,014.
The price spread of $35,804 (96.0% 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.
58 diamonds tracked in this segment
Price range: $1,476 to $37,280
Average price: $3,705
Median price: $2,014
Available across 5 retailers
Savings potential: up to 96.0%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
58
$1,476
$3,705
$2,014
$37,280
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
IGISave 77.3%6.55ct | Cushion | G | VS1 | Very Good
From $1,840
Compare at $8,100
IGISave 75.2%6.55ct | Cushion | D | VS2 | Excellent
From $3,547
Compare at $14,300
IGISave 71.2%6.55ct | Cushion | F | VS1 | Ideal
From $2,689
Compare at $9,330
IGISave 88.6%6.55ct | Cushion | F | VS1 | Very Good
From $2,133
Compare at $18,740
IGISave 27.3%6.55ct | Cushion | D | VVS1 | Very Good
From $13,993
Compare at $19,259
IGISave 65.6%6.55ct | Cushion | FANCY | VS1 | Excellent
From $5,272
Compare at $15,320
IGISave 85.6%6.55ct | Cushion | E | VVS2 | Excellent
From $2,388
Compare at $16,560
IGISave 69.5%6.55ct | Cushion | E | VS1 | Excellent
From $20,308
Compare at $66,480
IGISave 82.1%6.55ct | Cushion | G | VS1 | Excellent
From $2,060
Compare at $11,540
IGISave 61.6%6.55ct | Cushion | E | VVS2 | Excellent
From $1,635
Compare at $4,258
IGISave 81.6%6.56ct | Cushion | F | VS1 | Ideal
From $2,564
Compare at $13,950
IGISave 81.9%6.56ct | Cushion | F | VVS2 | Ideal
From $1,739
Compare at $9,610
IGISave 81.1%6.56ct | Cushion | F | VVS2 | Ideal
From $2,021
Compare at $10,670
IGISave 90.3%6.56ct | Cushion | G | VVS2 | Ideal
From $1,690
Compare at $17,350
IGISave 31.2%6.56ct | Cushion | E | VVS2 | Very Good
From $1,825
Compare at $2,653
IGISave 80.8%6.56ct | Cushion | G | VS1 | Ideal
From $1,944
Compare at $10,140
IGISave 85.3%6.56ct | Cushion | E | VVS2 | Ideal
From $2,425
Compare at $16,470
IGISave 85.3%6.57ct | Cushion | F | VS1 | Excellent
From $2,007
Compare at $13,610
IGISave 85.3%6.57ct | Cushion | E | VVS2 | Ideal
From $2,429
Compare at $16,500
IGISave 51.4%6.57ct | Cushion | FANCY | VS1 | Very Good
From $5,906
Compare at $12,164
IGISave 69.1%6.57ct | Cushion | E | VVS1 | Excellent
From $6,600
Compare at $21,336
IGISave 85.9%6.57ct | Cushion | G | VS1 | Ideal
From $1,964
Compare at $13,940
IGISave 82.2%6.58ct | Cushion | G | VS1 | Ideal
From $1,955
Compare at $10,970
IGISave 60.8%6.58ct | Cushion | E | VVS2 | Excellent
From $1,641
Compare at $4,188
IGISave 82.8%6.58ct | Cushion | F | VS1 | Excellent
From $2,063
Compare at $12,010
IGISave 31.2%6.58ct | Cushion | E | VVS2 | Very Good
From $1,849
Compare at $2,688
6.58ct | Cushion | D | VVS2 | Ideal
From $2,594
Compare at $19,440
IGISave 85.3%6.59ct | Cushion | E | VVS2 | Ideal
From $2,435
Compare at $16,550
IGISave 60.8%6.59ct | Cushion | E | VVS2 | Excellent
From $1,643
Compare at $4,194
IGISave 88%6.59ct | Cushion | G | VS1 | Ideal
From $1,680
Compare at $13,990
IGISave 85.4%6.59ct | Cushion | E | VS2 | Ideal
From $1,919
Compare at $13,130
GIASave 72.6%6.59ct | Cushion | F | FL | Excellent
From $37,280
Compare at $135,890
IGISave 88.2%6.6ct | Cushion | F | VVS2 | Excellent
From $1,738
Compare at $14,710
IGISave 31.2%6.6ct | Cushion | E | VVS2 | Very Good
From $1,836
Compare at $2,669
IGISave 83.8%6.6ct | Cushion | G | VVS2 | Very Good
From $2,122
Compare at $13,120
IGISave 31.2%6.6ct | Cushion | E | VVS2 | Very Good
From $1,836
Compare at $2,669
IGISave 56.3%6.6ct | Cushion | E | VVS2 | Very Good
From $1,836
Compare at $4,200
IGISave 21%6.6ct | Cushion | F | SI1 | Ideal
From $1,482
Compare at $1,877
IGISave 85.6%6.6ct | Cushion | F | VS2 | Ideal
From $1,671
Compare at $11,640
GIASave 64.5%6.6ct | Cushion | E | VVS2 | Ideal
From $16,570
Compare at $46,720
IGISave 85.3%6.6ct | Cushion | G | VS1 | Ideal
From $2,066
Compare at $14,010
IGISave 80.8%6.61ct | Cushion | G | VS1 | Ideal
From $1,957
Compare at $10,220
IGISave 80.8%6.61ct | Cushion | G | VS1 | Ideal
From $1,957
Compare at $10,220
IGISave 76.6%6.61ct | Cushion | E | VVS2 | Excellent
From $2,407
Compare at $10,290
IGISave 85.8%6.62ct | Cushion | E | VS1 | Ideal
From $2,358
Compare at $16,560
IGISave 72.5%6.62ct | Cushion | E | VS2 | Ideal
From $1,476
Compare at $5,360
IGISave 88%6.62ct | Cushion | G | VS1 | Ideal
From $1,686
Compare at $14,060
IGISave 76.1%6.62ct | Cushion | G | VS2 | Very Good
From $1,882
Compare at $7,860
IGISave 50%6.63ct | Cushion | F | VVS1 | Ideal
From $3,559
Compare at $7,123
IGISave 59%6.63ct | Cushion | E | VS1 | Ideal
From $3,875
Compare at $9,440
Entry pricing in this category starts around $1,476.
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 $35,804 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 $2,014 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 58 comparable stones in this segment. Prices start around $1,476 and go up to $37,280.
Based on the latest market data, the average asking price is about $3,705 with a median around $2,014.
The observed spread is roughly $35,804 across tracked listings, which is about 96.0% 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 $2,014, 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 5 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 $35,804 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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