6.3 Carat Cushion Lab Grown Diamond Prices Comparison
As of February 2026, 6.3 carat cushion lab grown diamonds usually range from $1,291 to $33,350, with an average price of $3,245.In the last month, prices for these diamonds are down 4%.Compare 65 verified listings across 7 retailers tracked by CaratRadar.
6.3 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 65 verified 6.3-carat cushion lab grown diamonds listed across 7 online retailers. Prices in this segment range from $1,291 to $33,350, with an average asking price of $3,245 and a median of $1,907.
The price spread of $32,059 (96.1% 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.
65 diamonds tracked in this segment
Price range: $1,291 to $33,350
Average price: $3,245
Median price: $1,907
Available across 7 retailers
Savings potential: up to 96.1%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
65
$1,291
$3,245
$1,907
$33,350
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 84.7%6.25ct | Cushion | F | VS1 | Ideal
From $1,336
Compare at $8,720
IGISave 83.4%6.25ct | Cushion | F | VVS2 | Excellent
From $1,657
Compare at $9,990
IGISave 53.9%6.25ct | Cushion | E | VVS2 | Excellent
From $1,852
Compare at $4,022
IGISave 85.5%6.25ct | Cushion | F | VVS2 | Excellent
From $2,033
Compare at $14,030
IGISave 84.9%6.25ct | Cushion | H | VS1 | Ideal
From $1,456
Compare at $9,640
IGISave 86%6.26ct | Cushion | E | VS1 | Ideal
From $2,173
Compare at $15,560
IGISave 85.9%6.26ct | Cushion | E | VVS2 | Ideal
From $2,210
Compare at $15,720
IGISave 83.5%6.26ct | Cushion | E | VVS2 | Excellent
From $1,720
Compare at $10,420
IGISave 86.9%6.26ct | Cushion | E | VVS2 | Very Good
From $2,066
Compare at $15,820
IGISave 60.6%6.26ct | Cushion | E | VVS2 | Excellent
From $1,573
Compare at $3,989
IGISave 85.3%6.26ct | Cushion | G | VS1 | Ideal
From $1,961
Compare at $13,310
IGISave 85.3%6.26ct | Cushion | G | VS1 | Ideal
From $1,961
Compare at $13,310
IGISave 22.3%6.27ct | Cushion | F | VVS2 | Very Good
From $1,709
Compare at $2,199
IGISave 83.4%6.27ct | Cushion | G | VS1 | Very Good
From $1,833
Compare at $11,050
IGISave 87.7%6.27ct | Cushion | E | VS1 | Excellent
From $1,925
Compare at $15,680
IGISave 27.1%6.27ct | Cushion | E | VVS2 | Very Good
From $1,868
Compare at $2,562
IGISave 75.7%6.27ct | Cushion | FANCY | VS1 | Good
From $2,717
Compare at $11,204
IGISave 80.7%6.27ct | Cushion | G | VS1 | Ideal
From $1,869
Compare at $9,700
IGISave 27.5%6.28ct | Cushion | E | VVS2 | Very Good
From $1,842
Compare at $2,540
IGISave 62%6.28ct | Cushion | E | VVS2 | Excellent
From $1,522
Compare at $4,003
IGISave 84.5%6.28ct | Cushion | G | VS2 | Ideal
From $1,871
Compare at $12,110
IGISave 85.2%6.28ct | Cushion | F | VS1 | Excellent
From $1,604
Compare at $10,850
IGISave 87%6.29ct | Cushion | E | VVS2 | Ideal
From $2,046
Compare at $15,790
IGISave 27.4%6.29ct | Cushion | E | VS1 | Very Good
From $1,714
Compare at $2,362
IGISave 62%6.29ct | Cushion | E | VVS2 | Excellent
From $1,524
Compare at $4,008
IGISave 85.9%6.29ct | Cushion | F | VS1 | Excellent
From $1,606
Compare at $11,350
IGISave 93.5%6.3ct | Cushion | G | VVS2 | Very Good
From $1,801
Compare at $27,874
IGISave 88.7%6.3ct | Cushion | D | VS1 | Very Good
From $1,820
Compare at $16,150
IGISave 72.6%6.3ct | Cushion | D | VS2 | Ideal
From $1,742
Compare at $6,360
IGISave 62%6.3ct | Cushion | E | VVS2 | Very Good
From $1,526
Compare at $4,015
IGISave 60.9%6.3ct | Cushion | E | VS1 | Excellent
From $1,493
Compare at $3,822
IGISave 82.8%6.3ct | Cushion | F | VS1 | Ideal
From $2,240
Compare at $13,050
IGISave 27.5%6.3ct | Cushion | E | VVS2 | Very Good
From $1,848
Compare at $2,548
IGISave 87.5%6.3ct | Cushion | F | VVS2 | Ideal
From $1,768
Compare at $14,130
IGISave 87.6%6.3ct | Cushion | F | VS1 | Excellent
From $1,608
Compare at $12,960
IGISave 82.4%6.3ct | Cushion | E | VVS2 | Very Good
From $6,115
Compare at $34,720
IGISave 41.7%6.31ct | Cushion | F | VS2 | Ideal
From $6,493
Compare at $11,130
IGISave 84.6%6.31ct | Cushion | E | VVS2 | Ideal
From $2,447
Compare at $15,940
IGISave 17.5%6.31ct | Cushion | D | VS1 | Very Good
From $2,031
Compare at $2,462
IGISave 17.5%6.31ct | Cushion | D | VS1 | Very Good
From $2,031
Compare at $2,462
IGISave 78.3%6.31ct | Cushion | F | VS1 | Excellent
From $2,103
Compare at $9,670
IGISave 83.5%6.31ct | Cushion | G | VVS2 | Ideal
From $2,065
Compare at $12,550
IGISave 66.8%6.32ct | Cushion | D | VS1 | Ideal
From $2,137
Compare at $6,445
IGISave 74.9%6.32ct | Cushion | E | VVS2 | Ideal
From $2,750
Compare at $10,940
IGISave 79.6%6.32ct | Cushion | E | VVS2 | Ideal
From $3,238
Compare at $15,870
IGISave 82.2%6.32ct | Cushion | E | VVS1 | Ideal
From $4,415
Compare at $24,770
IGISave 88%6.33ct | Cushion | E | VS1 | Ideal
From $1,907
Compare at $15,830
GIASave 74%6.33ct | Cushion | D | IF | Very Good
From $33,350
Compare at $128,450
IGISave 85.3%6.33ct | Cushion | G | VS1 | Ideal
From $1,982
Compare at $13,460
IGISave 82.2%6.33ct | Cushion | E | VVS1 | Ideal
From $4,421
Compare at $24,810
Entry pricing in this category starts around $1,291.
What to Know When Shopping for 6.3 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $32,059 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 $1,907 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 65 comparable stones in this segment. Prices start around $1,291 and go up to $33,350.
Based on the latest market data, the average asking price is about $3,245 with a median around $1,907.
The observed spread is roughly $32,059 across tracked listings, which is about 96.1% 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 $1,907, 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 7 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 $32,059 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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