8.3 Carat Cushion Lab Grown Diamond Prices Comparison
As of February 2026, 8.3 carat cushion lab grown diamonds usually range from $2,005 to $13,292, with an average price of $3,202.In the last month, prices for these diamonds are down 4%.Compare 65 verified listings across 4 retailers tracked by CaratRadar.
8.3 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 65 verified 8.3-carat cushion lab grown diamonds listed across 4 online retailers. Prices in this segment range from $2,005 to $13,292, with an average asking price of $3,202 and a median of $2,570.
The price spread of $11,286 (84.9% 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: $2,005 to $13,292
Average price: $3,202
Median price: $2,570
Available across 4 retailers
Savings potential: up to 84.9%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
65
$2,005
$3,202
$2,570
$13,292
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 71.6%8.25ct | Cushion | E | VVS2 | Excellent
From $2,482
Compare at $8,745
IGISave 86%8.25ct | Cushion | F | VVS2 | Excellent
From $2,570
Compare at $18,390
IGISave 71.6%8.25ct | Cushion | E | VVS2 | Excellent
From $2,482
Compare at $8,745
IGISave 20.8%8.25ct | Cushion | H | VS1 | Ideal
From $3,575
Compare at $4,512
IGISave 81.8%8.26ct | Cushion | G | VS2 | Ideal
From $2,876
Compare at $15,770
IGISave 71.6%8.26ct | Cushion | E | VS1 | Excellent
From $2,706
Compare at $9,530
IGISave 81.8%8.26ct | Cushion | G | VS1 | Ideal
From $3,032
Compare at $16,690
8.26ct | Cushion | F | VVS2 | Ideal
From $2,574
Compare at $18,410
IGISave 88.2%8.27ct | Cushion | F | VS1 | Excellent
From $2,005
Compare at $17,010
IGISave 68.1%8.27ct | Cushion | G | VS1 | Excellent
From $5,793
Compare at $18,140
IGISave 82.8%8.27ct | Cushion | E | VVS2 | Excellent
From $3,250
Compare at $18,950
IGISave 71.6%8.27ct | Cushion | E | VVS2 | Very Good
From $2,488
Compare at $8,765
IGISave 71.6%8.27ct | Cushion | E | VVS2 | Ideal
From $2,488
Compare at $8,765
IGISave 71.6%8.27ct | Cushion | E | VVS2 | Ideal
From $2,488
Compare at $8,765
IGISave 72%8.27ct | Cushion | F | VVS2 | Excellent
From $2,599
Compare at $9,280
IGISave 84.3%8.27ct | Cushion | G | VS2 | Ideal
From $2,491
Compare at $15,870
IGISave 42.1%8.27ct | Cushion | E | VS1 | Very Good
From $2,491
Compare at $4,304
IGISave 78.8%8.28ct | Cushion | F | VS2 | Ideal
From $3,786
Compare at $17,880
IGISave 71.6%8.28ct | Cushion | E | VVS2 | Very Good
From $2,491
Compare at $8,775
IGISave 71.6%8.28ct | Cushion | E | VVS2 | Very Good
From $2,491
Compare at $8,775
IGISave 71.6%8.28ct | Cushion | E | VVS2 | Excellent
From $2,491
Compare at $8,775
IGISave 62.8%8.28ct | Cushion | FANCY | VVS2 | Ideal
From $9,672
Compare at $25,975
IGISave 71.6%8.28ct | Cushion | F | VVS2 | Ideal
From $2,580
Compare at $9,090
IGISave 71.6%8.29ct | Cushion | F | VVS2 | Ideal
From $2,583
Compare at $9,100
IGISave 84.9%8.29ct | Cushion | F | VVS2 | Excellent
From $2,793
Compare at $18,480
IGISave 88.6%8.29ct | Cushion | E | VS1 | Very Good
From $2,362
Compare at $20,700
8.29ct | Cushion | E | VS1 | Excellent
From $2,671
Compare at $17,310
IGISave 50.4%8.29ct | Cushion | E | VS1 | Excellent
From $4,710
Compare at $9,500
IGISave 73.5%8.29ct | Cushion | E | VS1 | Excellent
From $5,971
Compare at $22,560
IGISave 84.3%8.3ct | Cushion | G | VS2 | Ideal
From $2,500
Compare at $15,920
IGISave 72%8.3ct | Cushion | F | VVS2 | Excellent
From $2,586
Compare at $9,230
IGISave 71.6%8.3ct | Cushion | E | VVS2 | Excellent
From $2,497
Compare at $8,795
IGISave 71.6%8.3ct | Cushion | E | VVS2 | Very Good
From $2,497
Compare at $8,795
IGISave 76.4%8.3ct | Cushion | E | VVS2 | Ideal
From $5,772
Compare at $24,420
IGISave 85.2%8.3ct | Cushion | E | VS1 | Ideal
From $2,674
Compare at $18,090
IGISave 71.6%8.3ct | Cushion | E | VVS2 | Excellent
From $2,497
Compare at $8,795
IGISave 81.8%8.31ct | Cushion | H | VS1 | Ideal
From $2,896
Compare at $15,890
IGISave 81.8%8.31ct | Cushion | F | VS1 | Ideal
From $3,805
Compare at $20,860
IGISave 71.6%8.31ct | Cushion | E | VVS2 | Excellent
From $2,500
Compare at $8,805
IGISave 72%8.31ct | Cushion | E | VS1 | Excellent
From $2,722
Compare at $9,710
IGISave 71.6%8.31ct | Cushion | E | VVS2 | Very Good
From $2,500
Compare at $8,805
IGISave 85.1%8.32ct | Cushion | G | VS1 | Ideal
From $2,619
Compare at $17,610
IGI8.32ct | Cushion | E | VS1 | Ideal
From $13,292
Compare at $14,763
IGISave 84.5%8.32ct | Cushion | E | VVS2 | Excellent
From $3,238
Compare at $20,940
IGISave 72%8.32ct | Cushion | F | VVS2 | Ideal
From $2,592
Compare at $9,250
IGISave 71.6%8.32ct | Cushion | E | VVS2 | Very Good
From $2,503
Compare at $8,815
IGISave 71.6%8.32ct | Cushion | E | VVS2 | Very Good
From $2,503
Compare at $8,815
IGISave 71.6%8.32ct | Cushion | E | VVS2 | Excellent
From $2,503
Compare at $8,815
IGISave 71.6%8.33ct | Cushion | E | VVS2 | Excellent
From $2,506
Compare at $8,825
IGISave 71.6%8.33ct | Cushion | E | VVS2 | Excellent
From $2,506
Compare at $8,825
Entry pricing in this category starts around $2,005.
What to Know When Shopping for 8.3 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $11,286 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 $2,570 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 $2,005 and go up to $13,292.
Based on the latest market data, the average asking price is about $3,202 with a median around $2,570.
The observed spread is roughly $11,286 across tracked listings, which is about 84.9% 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 $2,570, 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 4 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 $11,286 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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