6.3 Carat Cushion Lab Grown Diamond Prices Comparison
As of April 2026, 6.3 carat cushion lab grown diamonds usually range from $845 to $31,293, with an average price of $4,996.In the last month, prices for these diamonds are up 1.1%.Compare 53 verified listings across 6 retailers tracked by CaratRadar.
6.3 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 53 verified 6.3-carat cushion lab grown diamonds listed across 6 online retailers. Prices in this segment range from $845 to $31,293, with an average asking price of $4,996 and a median of $3,572.
The price spread of $30,448 (97.3% 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: $845 to $31,293
Average price: $4,996
Median price: $3,572
Available across 6 retailers
Savings potential: up to 97.3%
Price Range Overview
As of Apr 14, 2026Real market range for this carat, shape, and diamond type.
53
$845
$4,996
$3,572
$31,293
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 92%IGI | 6.3ct | Cushion | G | VVS2 | Very Good
From $2,233
Compare at $27,874
Save 74.3%IGI | 6.3ct | Cushion | E | VVS2 | Very Good
From $8,925
Compare at $34,720
Save 66.9%IGI | 6.3ct | Cushion | D | VS2 | Ideal
From $2,108
Compare at $6,360
Save 42.8%IGI | 6.3ct | Cushion | E | VVS2 | Very Good
From $1,687
Compare at $2,949
Save 29.5%IGI | 6.3ct | Cushion | E | VVS2 | Very Good
From $1,687
Compare at $2,392
Save 80.9%IGI | 6.3ct | Cushion | F | VS1 | Ideal
From $2,470
Compare at $12,960
Save 86.4%IGI | 6.3ct | Cushion | F | VVS2 | Ideal
From $1,922
Compare at $14,120
Save 87.2%IGI | 6.3ct | Cushion | E | VVS2 | Very Good
From $2,029
Compare at $15,900
Save 65.5%IGI | 6.31ct | Cushion | F | VS2 | Ideal
From $3,843
Compare at $11,130
Save 84.2%IGI | 6.31ct | Cushion | G | VVS2 | Ideal
From $1,976
Compare at $12,540
Save 83.5%IGI | 6.32ct | Cushion | E | VVS2 | Ideal
From $2,617
Compare at $15,870
Save 83.1%IGI | 6.32ct | Cushion | E | VVS2 | Ideal
From $2,681
Compare at $15,870
Save 73.4%IGI | 6.32ct | Cushion | E | VVS1 | Ideal
From $6,589
Compare at $24,770
Save 61.1%IGI | 6.32ct | Cushion | D | VS1 | Ideal
From $2,509
Compare at $6,445
Save 75.3%GIA | 6.33ct | Cushion | D | IF | Very Good
From $33,350
Compare at $135,100
Save 32.7%GIA | 6.33ct | Cushion | E | VVS2 | Ideal
From $10,730
Compare at $15,940
Save 74.9%IGI | 6.33ct | Cushion | G | VS1 | Ideal
From $2,804
Compare at $11,160
Save 82.4%IGI | 6.33ct | Cushion | G | VS1 | Ideal
From $1,982
Compare at $11,240
Save 27.5%IGI | 6.33ct | Cushion | E | VS1 | Very Good
From $5,395
Compare at $7,444
Save 85.2%IGI | 6.33ct | Cushion | E | VS1 | Good
From $2,341
Compare at $15,820
Save 73.4%IGI | 6.33ct | Cushion | E | VVS1 | Ideal
From $6,600
Compare at $24,810
Save 85.8%IGI | 6.33ct | Cushion | E | VS1 | Ideal
From $2,255
Compare at $15,830
Save 78.7%IGI | 6.33ct | Cushion | E | VVS2 | Ideal
From $3,406
Compare at $15,970
Save 12.2%GIA | 6.34ct | Cushion | E | VS2 | Ideal
From $12,530
Compare at $14,265
Save 77.3%IGI | 6.34ct | Cushion | G | VS1 | Very Good
From $1,835
Compare at $8,080
Save 77.3%IGI | 6.34ct | Cushion | F | VS2 | Ideal
From $1,907
Compare at $8,390
Save 77.9%IGI | 6.34ct | Cushion | E | VVS2 | Ideal
From $3,524
Compare at $15,920
Save 82.1%IGI | 6.34ct | Cushion | D | VS1 | Ideal
From $2,938
Compare at $16,370
Save 65.2%IGI | 6.34ct | Cushion | E | VS1 | Ideal
From $1,898
Compare at $5,450
Save 42.8%IGI | 6.34ct | Cushion | E | VVS2 | Excellent
From $1,698
Compare at $2,967
Save 81.5%IGI | 6.34ct | Cushion | D | IF | Ideal
From $7,750
Compare at $41,850
IGI | 6.34ct | Cushion | FANCY | VS2 | Excellent
From $5,135
Compare at $7,324
Save 87.2%IGI | 6.34ct | Cushion | E | VVS2 | Very Good
From $2,042
Compare at $16,000
Save 88.3%IGI | 6.35ct | Cushion | E | VVS2 | Ideal
From $1,863
Compare at $15,940
Save 88.3%IGI | 6.35ct | Cushion | E | VVS2 | Excellent
From $1,863
Compare at $15,940
Save 42.8%IGI | 6.35ct | Cushion | E | VVS2 | Excellent
From $1,701
Compare at $2,972
Save 42.8%IGI | 6.35ct | Cushion | E | VVS2 | Very Good
From $1,701
Compare at $2,972
Save 42.8%IGI | 6.35ct | Cushion | E | VVS2 | Excellent
From $1,701
Compare at $2,972
Save 83.7%IGI | 6.35ct | Cushion | E | VS1 | Good
From $2,580
Compare at $15,780
Save 88.3%IGI | 6.36ct | Cushion | E | VVS2 | Excellent
From $1,866
Compare at $15,970
Save 70.2%GIA | 6.37ct | Cushion | E | VVS1 | Very Good
From $20,370
Compare at $68,297
Save 78.9%IGI | 6.37ct | Cushion | D | VS1 | Ideal
From $3,441
Compare at $16,330
Save 60.8%IGI | 6.38ct | Cushion | FANCY | VS1 | Very Good
From $6,160
Compare at $15,708
Save 84.6%IGI | 6.39ct | Cushion | E | VVS2 | Ideal
From $2,478
Compare at $16,140
Save 84.6%IGI | 6.39ct | Cushion | E | VVS2 | Ideal
From $2,478
Compare at $16,140
Save 66.5%IGI | 6.39ct | Cushion | F | VVS1 | Ideal
From $7,847
Compare at $23,410
Save 85.2%IGI | 6.39ct | Cushion | E | VS1 | Very Good
From $2,363
Compare at $15,980
Save 82.4%IGI | 6.4ct | Cushion | G | VS1 | Ideal
From $2,004
Compare at $11,360
Save 85.2%IGI | 6.4ct | Cushion | E | VS1 | Excellent
From $2,367
Compare at $16,010
Save 72.8%IGI | 6.4ct | Cushion | F | VVS1 | Ideal
From $4,144
Compare at $15,230
Entry pricing in this category starts around $845.
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 $30,448 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 $3,572 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 $845 and go up to $31,293.
Based on the latest market data, the average asking price is about $4,996 with a median around $3,572.
The observed spread is roughly $30,448 across tracked listings, which is about 97.3% 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 $3,572, 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 6 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 $30,448 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.
Related Price Categories
Explore adjacent carat ranges and shapes to compare market shifts.
6.2 Carat Cushion Lab Grown Diamond Prices
6.1 Carat Cushion Lab Grown Diamond Prices
6 Carat Cushion Lab Grown Diamond Prices
6.4 Carat Cushion Lab Grown Diamond Prices
5.9 Carat Cushion Lab Grown Diamond Prices
6.5 Carat Cushion Lab Grown Diamond Prices
5.8 Carat Cushion Lab Grown Diamond Prices
6.3 Carat Marquise Lab Grown Diamond Prices
6.3 Carat Oval Lab Grown Diamond Prices
6.3 Carat Round Lab Grown Diamond Prices
6.3 Carat Pear Lab Grown Diamond Prices
6.3 Carat Emerald Lab Grown Diamond Prices
Tracking Lab Grown inventory for 6.3 carat Cushion diamonds.