6.5 Carat Cushion Lab Grown Diamond Prices Comparison
As of May 2026, 6.5 carat cushion lab grown diamonds usually range from $920 to $48,203, with an average price of $5,641.In the last month, prices for these diamonds are down 9.5%.Compare 57 verified listings across 5 retailers tracked by CaratRadar.
6.5 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 57 verified 6.5-carat cushion lab grown diamonds listed across 5 online retailers. Prices in this segment range from $920 to $48,202, with an average asking price of $5,641 and a median of $3,837.
The price spread of $47,282 (98.1% 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.
57 diamonds tracked in this segment
Price range: $920 to $48,202
Average price: $5,641
Median price: $3,837
Available across 5 retailers
Savings potential: up to 98.1%
Price Range Overview
As of May 31, 2026Real market range for this carat, shape, and diamond type.
57
$920
$5,641
$3,837
$48,203
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 26.5%IGI | 6.51ct | Cushion | F | VS1 | Very Good
From $1,172
Compare at $1,595
Save 68.5%IGI | 6.59ct | Cushion | E | VVS2 | Very Good
From $1,210
Compare at $3,845
Save 67.9%IGI | 6.52ct | Cushion | E | VVS2 | Very Good
From $1,210
Compare at $3,770
Save 67.9%IGI | 6.52ct | Cushion | E | VVS2 | Very Good
From $1,210
Compare at $3,770
Save 69.2%IGI | 6.53ct | Cushion | G | VVS2 | Ideal
From $1,214
Compare at $3,947
Save 68%IGI | 6.54ct | Cushion | E | VVS2 | Very Good
From $1,215
Compare at $3,793
Save 68%IGI | 6.56ct | Cushion | E | VVS2 | Very Good
From $1,220
Compare at $3,815
Save 65.9%IGI | 6.57ct | Cushion | E | VS1 | Excellent
From $1,228
Compare at $3,597
Save 66.8%IGI | 6.5ct | Cushion | E | VVS2 | Very Good
From $1,243
Compare at $3,749
Save 66.8%IGI | 6.5ct | Cushion | E | VVS2 | Very Good
From $1,243
Compare at $3,749
Save 66.9%IGI | 6.51ct | Cushion | E | VVS2 | Excellent
From $1,244
Compare at $3,760
Save 66.9%IGI | 6.51ct | Cushion | E | VVS2 | Excellent
From $1,244
Compare at $3,760
Save 67%IGI | 6.54ct | Cushion | E | VVS2 | Excellent
From $1,250
Compare at $3,793
Save 64%IGI | 6.52ct | Cushion | G | VS1 | Ideal
From $1,253
Compare at $3,478
Save 67.2%IGI | 6.58ct | Cushion | E | VVS2 | Excellent
From $1,257
Compare at $3,837
Save 67.2%IGI | 6.58ct | Cushion | E | VVS2 | Excellent
From $1,257
Compare at $3,837
Save 67.3%IGI | 6.59ct | Cushion | E | VVS2 | Excellent
From $1,259
Compare at $3,848
Save 66.9%IGI | 6.58ct | Cushion | E | VVS2 | Very Good
From $1,272
Compare at $3,841
Save 75.2%IGI | 6.5ct | Cushion | E | VS2 | Ideal
From $1,317
Compare at $5,309
Save 75.2%IGI | 6.54ct | Cushion | E | VS2 | Ideal
From $1,324
Compare at $5,341
Save 75.2%IGI | 6.52ct | Cushion | E | VS1 | Ideal
From $1,371
Compare at $5,536
Save 61.5%IGI | 6.51ct | Cushion | F | VVS2 | Ideal
From $1,385
Compare at $3,596
Save 72.1%IGI | 6.5ct | Cushion | E | VS1 | Ideal
From $1,450
Compare at $5,199
Save 70.6%IGI | 6.51ct | Cushion | E | VS1 | Excellent
From $1,452
Compare at $4,935
Save 70.6%IGI | 6.52ct | Cushion | E | VS1 | Ideal
From $1,454
Compare at $4,943
Save 71.2%IGI | 6.53ct | Cushion | E | VS1 | Very Good
From $1,457
Compare at $5,067
Save 32.9%IGI | 6.56ct | Cushion | F | VVS2 | Ideal
From $1,463
Compare at $2,181
Save 68.9%IGI | 6.51ct | Cushion | E | VVS2 | Very Good
From $1,594
Compare at $5,133
Save 54.5%IGI | 6.5ct | Cushion | F | VVS2 | Excellent
From $1,597
Compare at $3,513
Save 69.4%IGI | 6.54ct | Cushion | E | VVS2 | Ideal
From $1,601
Compare at $5,231
Save 69%IGI | 6.55ct | Cushion | E | VVS2 | Very Good
From $1,603
Compare at $5,165
Save 54.8%IGI | 6.55ct | Cushion | F | VVS2 | Excellent
From $1,609
Compare at $3,564
Save 79.5%IGI | 6.51ct | Cushion | F | VS1 | Ideal
From $1,714
Compare at $8,360
Save 46.4%IGI | 6.5ct | Cushion | F | VS1 | Very Good
From $1,970
Compare at $3,676
Save 57%IGI | 6.52ct | Cushion | F | VVS2 | Ideal
From $1,989
Compare at $4,627
Save 72.9%IGI | 6.54ct | Cushion | FANCY | VVS2 | Very Good
From $2,081
Compare at $7,668
Save 39.7%IGI | 6.59ct | Cushion | E | VVS2 | Ideal
From $2,198
Compare at $3,645
Save 61.1%IGI | 6.52ct | Cushion | D | VS1 | Ideal
From $2,230
Compare at $5,734
Save 42.4%IGI | 6.52ct | Cushion | E | VS1 | Excellent
From $2,258
Compare at $3,919
Save 37.4%IGI | 6.56ct | Cushion | E | VVS2 | Ideal
From $2,272
Compare at $3,628
Save 74.9%IGI | 6.53ct | Cushion | G | VS1 | Ideal
From $2,532
Compare at $10,100
Save 74.9%IGI | 6.56ct | Cushion | G | VS1 | Ideal
From $2,542
Compare at $10,140
Save 79%IGI | 6.56ct | Cushion | F | VS1 | Ideal
From $2,927
Compare at $13,950
Save 79.4%IGI | 6.51ct | Cushion | D | VVS2 | Very Good
From $2,981
Compare at $14,477
Save 77.8%IGI | 6.51ct | Cushion | F | VS1 | Ideal
From $3,067
Compare at $13,840
Save 60.3%IGI | 6.55ct | Cushion | G | VVS1 | Very Good
From $3,114
Compare at $7,853
Save 46.9%IGI | 6.53ct | Cushion | E | VVS2 | Very Good
From $3,165
Compare at $5,960
Save 74.3%IGI | 6.57ct | Cushion | FANCY | VS1 | Very Good
From $3,620
Compare at $14,079
Save 79.4%IGI | 6.52ct | Cushion | E | VVS1 | Very Good
From $4,197
Compare at $20,412
Save 77.1%IGI | 6.57ct | Cushion | E | VVS1 | Excellent
From $4,236
Compare at $18,520
Entry pricing in this category starts around $920.
What to Know When Shopping for 6.5 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $47,282 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 $3,837 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 57 comparable stones in this segment. Prices start around $920 and go up to $48,202.
Based on the latest market data, the average asking price is about $5,641 with a median around $3,837.
The observed spread is roughly $47,282 across tracked listings, which is about 98.1% from highest to lowest offer in this bucket.
We refresh pricing data daily so these pages stay current with market changes.
Based on completed market data, the fair market benchmark is $5,641. The median price is $3,837, so offers between the median and fair benchmark can be reasonable, while reputable listings below the median may be especially competitive.
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 $47,282 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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Tracking Lab Grown inventory for 6.5 carat Cushion diamonds.