6.5 Carat Cushion Lab Grown Diamond Prices Comparison
As of February 2026, 6.5 carat cushion lab grown diamonds usually range from $1,173 to $30,990, with an average price of $3,104.In the last month, prices for these diamonds are down 3.8%.Compare 80 verified listings across 8 retailers tracked by CaratRadar.
6.5 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 80 verified 6.5-carat cushion lab grown diamonds listed across 8 online retailers. Prices in this segment range from $1,173 to $30,990, with an average asking price of $3,104 and a median of $2,040.
The price spread of $29,817 (96.2% 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.
80 diamonds tracked in this segment
Price range: $1,173 to $30,990
Average price: $3,104
Median price: $2,040
Available across 8 retailers
Savings potential: up to 96.2%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
80
$1,173
$3,104
$2,040
$30,990
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 62.6%6.46ct | Cushion | G | VS1 | Very Good
From $1,173
Compare at $3,133
IGISave 60.7%6.46ct | Cushion | E | VVS2 | Very Good
From $1,616
Compare at $4,114
IGISave 82.5%6.46ct | Cushion | G | VS2 | Very Good
From $1,837
Compare at $10,490
IGISave 69.7%6.47ct | Cushion | D | IF | Ideal
From $30,990
Compare at $102,300
IGISave 84.6%6.47ct | Cushion | D | VS1 | Excellent
From $2,567
Compare at $16,720
IGISave 27.5%6.47ct | Cushion | E | VVS2 | Very Good
From $1,898
Compare at $2,617
6.47ct | Cushion | E | VS1 | Good
From $4,547
Compare at $5,175
IGISave 89.4%6.48ct | Cushion | E | VS1 | Excellent
From $1,710
Compare at $16,110
IGISave 26.8%6.49ct | Cushion | E | VVS2 | Very Good
From $1,922
Compare at $2,625
IGISave 87.8%6.49ct | Cushion | E | VS1 | Excellent
From $1,985
Compare at $16,230
IGISave 48.6%6.5ct | Cushion | F | VS1 | Very Good
From $2,153
Compare at $4,190
IGISave 85.3%6.5ct | Cushion | G | VS1 | Ideal
From $2,035
Compare at $13,810
IGISave 85.5%6.5ct | Cushion | F | VS2 | Ideal
From $1,665
Compare at $11,460
IGISave 85.8%6.5ct | Cushion | E | VS1 | Good
From $2,315
Compare at $16,260
IGISave 88.1%6.5ct | Cushion | F | VS1 | Ideal
From $1,594
Compare at $13,450
IGISave 81.8%6.5ct | Cushion | F | VVS2 | Excellent
From $1,633
Compare at $8,980
IGISave 72.1%6.5ct | Cushion | E | VS2 | Ideal
From $1,467
Compare at $5,265
IGISave 31.2%6.5ct | Cushion | E | VVS2 | Very Good
From $1,827
Compare at $2,656
IGISave 88.3%6.5ct | Cushion | F | VS1 | Ideal
From $1,569
Compare at $13,370
IGISave 84.6%6.51ct | Cushion | E | VS2 | Ideal
From $1,983
Compare at $12,870
IGISave 52.2%6.51ct | Cushion | F | VS1 | Very Good
From $1,735
Compare at $3,630
IGISave 84.7%6.51ct | Cushion | H | VS1 | Ideal
From $1,538
Compare at $10,020
6.51ct | Cushion | E | VS1 | Excellent
From $2,336
Compare at $5,235
IGISave 85.7%6.51ct | Cushion | F | VS1 | Ideal
From $1,925
Compare at $13,490
IGISave 85.3%6.51ct | Cushion | G | VS1 | Ideal
From $2,038
Compare at $13,830
IGISave 76%6.51ct | Cushion | G | VS2 | Very Good
From $1,851
Compare at $7,730
IGISave 57.3%6.51ct | Cushion | FANCY | VS1 | Very Good
From $5,741
Compare at $13,443
IGISave 74.9%6.51ct | Cushion | E | VVS2 | Ideal
From $4,101
Compare at $16,340
IGISave 82.4%6.51ct | Cushion | F | VVS2 | Ideal
From $1,767
Compare at $10,060
IGISave 77.8%6.51ct | Cushion | F | VS1 | Ideal
From $1,951
Compare at $8,800
IGISave 85.3%6.51ct | Cushion | E | VVS2 | Ideal
From $2,408
Compare at $16,340
IGISave 82%6.51ct | Cushion | D | VVS2 | Very Good
From $3,601
Compare at $20,010
IGISave 43.2%6.51ct | Cushion | F | VVS2 | Ideal
From $2,220
Compare at $3,912
IGISave 72.4%6.51ct | Cushion | F | VS1 | Ideal
From $3,824
Compare at $13,840
IGISave 82.8%6.51ct | Cushion | F | VS1 | Excellent
From $2,043
Compare at $11,890
IGISave 26.8%6.52ct | Cushion | E | VVS2 | Very Good
From $1,931
Compare at $2,637
IGISave 80.2%6.52ct | Cushion | F | VVS2 | Ideal
From $2,210
Compare at $11,140
IGISave 61.3%6.52ct | Cushion | E | VVS2 | Ideal
From $2,075
Compare at $5,356
IGISave 91.4%6.52ct | Cushion | G | VS1 | Ideal
From $1,503
Compare at $17,570
IGISave 85.3%6.52ct | Cushion | G | VS1 | Ideal
From $2,041
Compare at $13,850
IGISave 82.8%6.52ct | Cushion | F | VS1 | Excellent
From $2,046
Compare at $11,900
IGISave 69.1%6.52ct | Cushion | E | VVS1 | Very Good
From $6,553
Compare at $21,173
IGISave 80.8%6.52ct | Cushion | F | VS1 | Excellent
From $1,598
Compare at $8,310
IGISave 82.7%6.52ct | Cushion | E | VVS2 | Excellent
From $2,413
Compare at $13,940
IGISave 66.2%6.52ct | Cushion | E | VS1 | Ideal
From $1,893
Compare at $5,605
IGISave 86.9%6.52ct | Cushion | F | VVS2 | Ideal
From $1,914
Compare at $14,630
IGISave 82.7%6.52ct | Cushion | E | VVS2 | Excellent
From $2,413
Compare at $13,940
IGISave 86.8%6.52ct | Cushion | E | VVS2 | Very Good
From $2,185
Compare at $16,490
IGISave 83.8%6.52ct | Cushion | F | VS2 | Excellent
From $1,875
Compare at $11,590
IGISave 83.8%6.52ct | Cushion | D | VS2 | Ideal
From $4,343
Compare at $26,790
Entry pricing in this category starts around $1,173.
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 $29,817 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 $2,040 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 80 comparable stones in this segment. Prices start around $1,173 and go up to $30,990.
Based on the latest market data, the average asking price is about $3,104 with a median around $2,040.
The observed spread is roughly $29,817 across tracked listings, which is about 96.2% 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 $2,040, 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 8 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 $29,817 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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