8.3 Carat Cushion Lab Grown Diamond Prices Comparison
As of April 2026, 8.3 carat cushion lab grown diamonds usually range from $805 to $24,631, with an average price of $6,758.In the last month, prices for these diamonds are up 1.6%.Compare 46 verified listings across 3 retailers tracked by CaratRadar.
8.3 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 46 verified 8.3-carat cushion lab grown diamonds listed across 3 online retailers. Prices in this segment range from $805 to $24,631, with an average asking price of $6,758 and a median of $4,750.
The price spread of $23,826 (96.7% 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.
46 diamonds tracked in this segment
Price range: $805 to $24,631
Average price: $6,758
Median price: $4,750
Available across 3 retailers
Savings potential: up to 96.7%
Price Range Overview
As of Apr 15, 2026Real market range for this carat, shape, and diamond type.
46
$805
$6,758
$4,750
$24,631
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 59.3%IGI | 8.31ct | Cushion | H | VS1 | Ideal
From $6,465
Compare at $15,890
Save 73.4%IGI | 8.31ct | Cushion | F | VS1 | Ideal
From $4,566
Compare at $17,140
Save 78.4%IGI | 8.31ct | Cushion | E | VS1 | Ideal
From $5,855
Compare at $27,150
Save 73.6%IGI | 8.31ct | Cushion | E | VVS2 | Excellent
From $2,323
Compare at $8,805
Save 87.6%IGI | 8.31ct | Cushion | E | VS1 | Excellent
From $2,567
Compare at $20,660
Save 82.3%IGI | 8.32ct | Cushion | G | VS1 | Ideal
From $2,619
Compare at $14,770
Save 81.8%IGI | 8.32ct | Cushion | E | VVS2 | Excellent
From $3,805
Compare at $20,940
Save 86.7%IGI | 8.32ct | Cushion | F | VVS2 | Ideal
From $2,459
Compare at $18,540
Save 73.6%IGI | 8.32ct | Cushion | E | VVS2 | Very Good
From $2,326
Compare at $8,815
Save 73.6%IGI | 8.32ct | Cushion | E | VVS2 | Very Good
From $2,326
Compare at $8,815
Save 86.7%IGI | 8.33ct | Cushion | F | VVS2 | Excellent
From $2,462
Compare at $18,570
Save 73.6%IGI | 8.33ct | Cushion | E | VVS2 | Excellent
From $2,328
Compare at $8,825
Save 71.4%IGI | 8.33ct | Cushion | D | VVS2 | Ideal
From $7,045
Compare at $24,660
Save 73.6%IGI | 8.33ct | Cushion | E | VVS2 | Excellent
From $2,328
Compare at $8,825
Save 86.7%IGI | 8.33ct | Cushion | F | VVS2 | Excellent
From $2,462
Compare at $18,570
Save 73.6%IGI | 8.33ct | Cushion | E | VVS2 | Excellent
From $2,328
Compare at $8,825
Save 88.2%IGI | 8.33ct | Cushion | F | VVS2 | Very Good
From $2,195
Compare at $18,660
Save 88.2%IGI | 8.33ct | Cushion | F | VVS2 | Very Good
From $2,195
Compare at $18,660
Save 73.6%IGI | 8.33ct | Cushion | E | VVS2 | Very Good
From $2,328
Compare at $8,825
Save 73.6%IGI | 8.33ct | Cushion | E | VVS2 | Very Good
From $2,328
Compare at $8,825
Save 73.6%IGI | 8.34ct | Cushion | E | VVS2 | Ideal
From $2,331
Compare at $8,840
Save 86.7%IGI | 8.34ct | Cushion | F | VVS2 | Excellent
From $2,465
Compare at $18,590
Save 86.7%IGI | 8.34ct | Cushion | E | VVS2 | Excellent
From $2,309
Compare at $17,390
IGI | 8.35ct | Cushion | H | VS1 | Ideal
From $3,618
Compare at $3,620
Save 25.3%IGI | 8.35ct | Cushion | H | VS2 | Ideal
From $3,446
Compare at $4,612
Save 83%IGI | 8.35ct | Cushion | E | VS1 | Excellent
From $3,563
Compare at $20,910
Save 84.7%IGI | 8.35ct | Cushion | E | VVS2 | Excellent
From $2,540
Compare at $16,580
Save 71.4%IGI | 8.35ct | Cushion | E | VS1 | Very Good
From $4,044
Compare at $14,150
Save 74.8%IGI | 8.36ct | Cushion | G | VS1 | Excellent
From $2,148
Compare at $8,540
Save 87.4%IGI | 8.36ct | Cushion | E | VVS2 | Ideal
From $2,314
Compare at $18,300
Save 73.4%IGI | 8.37ct | Cushion | F | VS1 | Ideal
From $4,598
Compare at $17,270
Save 87.8%IGI | 8.37ct | Cushion | E | VS1 | Excellent
From $2,540
Compare at $20,810
Save 81.6%IGI | 8.38ct | Cushion | G | VS2 | Ideal
From $2,524
Compare at $13,710
Save 75.4%IGI | 8.38ct | Cushion | E | VS1 | Ideal
From $5,128
Compare at $20,880
Save 73.4%IGI | 8.38ct | Cushion | E | VVS2 | Excellent
From $2,365
Compare at $8,880
IGI | 8.38ct | Cushion | F | VVS2 | Excellent
From $2,476
Compare at $18,680
Save 73.6%IGI | 8.38ct | Cushion | E | VVS2 | Very Good
From $2,342
Compare at $8,880
Save 66.1%IGI | 8.39ct | Cushion | E | VS2 | Ideal
From $2,301
Compare at $6,795
IGI | 8.39ct | Cushion | FANCY | VS2 | Ideal
From $5,341
Compare at $9,271
Save 73.6%IGI | 8.39ct | Cushion | E | VVS2 | Excellent
From $2,345
Compare at $8,890
Save 73.6%IGI | 8.39ct | Cushion | E | VVS2 | Very Good
From $2,345
Compare at $8,890
Save 73.6%IGI | 8.4ct | Cushion | E | VVS2 | Ideal
From $2,348
Compare at $8,900
Save 73.6%IGI | 8.4ct | Cushion | E | VVS2 | Excellent
From $2,348
Compare at $8,900
Save 87.8%IGI | 8.4ct | Cushion | E | VS1 | Ideal
From $2,549
Compare at $20,880
Save 88.2%IGI | 8.4ct | Cushion | F | VVS2 | Excellent
From $2,213
Compare at $18,810
Save 73.6%IGI | 8.4ct | Cushion | E | VVS2 | Excellent
From $2,348
Compare at $8,900
Entry pricing in this category starts around $805.
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 $23,826 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 $4,750 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 46 comparable stones in this segment. Prices start around $805 and go up to $24,631.
Based on the latest market data, the average asking price is about $6,758 with a median around $4,750.
The observed spread is roughly $23,826 across tracked listings, which is about 96.7% 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 $4,750, 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 3 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 $23,826 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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