8.1 Carat Cushion Lab Grown Diamond Prices Comparison
As of April 2026, 8.1 carat cushion lab grown diamonds usually range from $1,470 to $54,964, with an average price of $7,667.In the last month, prices for these diamonds are down 0.5%.Compare 69 verified listings across 4 retailers tracked by CaratRadar.
8.1 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 69 verified 8.1-carat cushion lab grown diamonds listed across 4 online retailers. Prices in this segment range from $1,470 to $54,964, with an average asking price of $7,667 and a median of $5,326.
The price spread of $53,494 (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.
69 diamonds tracked in this segment
Price range: $1,470 to $54,964
Average price: $7,667
Median price: $5,326
Available across 4 retailers
Savings potential: up to 97.3%
Price Range Overview
As of Apr 14, 2026Real market range for this carat, shape, and diamond type.
69
$1,470
$7,667
$5,326
$54,964
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 30.4%IGI | 8.1ct | Cushion | E | VS1 | Ideal
From $3,478
Compare at $4,997
Save 74.4%IGI | 8.1ct | Cushion | F | VS1 | Very Good
From $10,949
Compare at $42,840
Save 78.9%IGI | 8.1ct | Cushion | E | SI1 | Ideal
From $2,777
Compare at $13,190
Save 84.7%IGI | 8.1ct | Cushion | E | VVS2 | Ideal
From $3,108
Compare at $20,340
Save 81.5%IGI | 8.1ct | Cushion | E | VVS2 | Excellent
From $3,780
Compare at $20,390
Save 85%IGI | 8.1ct | Cushion | F | VVS2 | Ideal
From $2,726
Compare at $18,190
Save 85%IGI | 8.1ct | Cushion | F | VVS2 | Ideal
From $2,726
Compare at $18,190
Save 73.7%IGI | 8.1ct | Cushion | F | VVS2 | Ideal
From $2,777
Compare at $10,560
Save 87.5%IGI | 8.1ct | Cushion | F | VVS2 | Excellent
From $2,264
Compare at $18,170
Save 75%IGI | 8.1ct | Cushion | E | VS1 | Very Good
From $5,054
Compare at $20,180
IGI | 8.1ct | Cushion | FANCY | VS1 | Excellent
From $6,825
Compare at $11,845
Save 82.3%IGI | 8.11ct | Cushion | G | VS1 | Ideal
From $2,553
Compare at $14,400
Save 81.6%IGI | 8.11ct | Cushion | G | VS2 | Ideal
From $2,443
Compare at $13,270
Save 73.4%IGI | 8.11ct | Cushion | F | VS1 | Ideal
From $4,456
Compare at $16,730
Save 64.9%IGI | 8.11ct | Cushion | E | VS1 | Ideal
From $2,449
Compare at $6,970
Save 86.9%IGI | 8.11ct | Cushion | E | VVS2 | Very Good
From $2,686
Compare at $20,470
Save 72.8%IGI | 8.12ct | Cushion | F | VS1 | Very Good
From $4,588
Compare at $16,850
Save 73.4%IGI | 8.12ct | Cushion | F | VS1 | Ideal
From $4,462
Compare at $16,750
Save 71.6%IGI | 8.12ct | Cushion | E | VVS2 | Excellent
From $2,552
Compare at $8,990
Save 78%IGI | 8.12ct | Cushion | F | VVS2 | Ideal
From $2,400
Compare at $10,910
Save 71.6%IGI | 8.12ct | Cushion | E | VVS2 | Excellent
From $2,552
Compare at $8,990
Save 78%IGI | 8.12ct | Cushion | F | VVS2 | Ideal
From $2,400
Compare at $10,910
Save 71.6%IGI | 8.12ct | Cushion | E | VVS2 | Ideal
From $2,552
Compare at $8,990
Save 71.4%IGI | 8.12ct | Cushion | E | VVS2 | Excellent
From $2,850
Compare at $9,950
Save 75.7%IGI | 8.12ct | Cushion | E | VVS2 | Excellent
From $10,963
Compare at $45,180
Save 25.4%IGI | 8.13ct | Cushion | H | VS2 | Ideal
From $3,355
Compare at $4,495
Save 71.3%IGI | 8.13ct | Cushion | F | VVS2 | Very Good
From $3,746
Compare at $13,070
Save 71.6%IGI | 8.13ct | Cushion | E | VVS2 | Ideal
From $2,555
Compare at $9,000
Save 71.6%IGI | 8.13ct | Cushion | E | VVS2 | Excellent
From $2,555
Compare at $9,000
Save 71.6%IGI | 8.13ct | Cushion | E | VVS2 | Excellent
From $2,555
Compare at $9,000
Save 81.5%IGI | 8.14ct | Cushion | E | VVS2 | Excellent
From $3,798
Compare at $20,490
Save 81.6%IGI | 8.14ct | Cushion | E | VVS2 | Ideal
From $3,751
Compare at $20,440
Save 60.2%IGI | 8.14ct | Cushion | FANCY | VVS2 | Very Good
From $8,356
Compare at $21,011
Save 71.6%IGI | 8.14ct | Cushion | E | VVS2 | Excellent
From $2,558
Compare at $9,010
Save 71.6%IGI | 8.14ct | Cushion | E | VVS2 | Excellent
From $2,580
Compare at $9,090
Save 87.1%IGI | 8.14ct | Cushion | E | VS1 | Excellent
From $2,471
Compare at $19,220
Save 71.6%IGI | 8.14ct | Cushion | E | VVS2 | Excellent
From $2,558
Compare at $9,010
Save 71.6%IGI | 8.14ct | Cushion | E | VVS2 | Excellent
From $2,558
Compare at $9,010
Save 74.3%IGI | 8.15ct | Cushion | G | VS1 | Very Good
From $4,230
Compare at $16,470
Save 82.6%IGI | 8.15ct | Cushion | F | VVS2 | Very Good
From $3,178
Compare at $18,310
IGI | 8.15ct | Cushion | FANCY | VS2 | Very Good
From $6,409
Compare at $11,125
Save 71.6%IGI | 8.15ct | Cushion | E | VVS2 | Excellent
From $2,561
Compare at $9,020
Save 78%IGI | 8.15ct | Cushion | F | VVS2 | Ideal
From $2,409
Compare at $10,950
Save 71.6%IGI | 8.15ct | Cushion | E | VVS2 | Excellent
From $2,561
Compare at $9,020
Save 78%IGI | 8.15ct | Cushion | F | VVS2 | Ideal
From $2,409
Compare at $10,950
Save 78%IGI | 8.15ct | Cushion | F | VVS2 | Ideal
From $2,409
Compare at $10,950
IGI | 8.15ct | Cushion | F | VVS2 | Excellent
From $2,409
Compare at $3,275
Save 81.6%IGI | 8.16ct | Cushion | G | VS2 | Ideal
From $2,458
Compare at $13,350
Save 79.6%IGI | 8.16ct | Cushion | E | VVS2 | Ideal
From $4,180
Compare at $20,540
Save 61.8%IGI | 8.16ct | Cushion | F | VVS1 | Ideal
From $7,985
Compare at $20,930
Entry pricing in this category starts around $1,470.
What to Know When Shopping for 8.1 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $53,494 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 $5,326 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 69 comparable stones in this segment. Prices start around $1,470 and go up to $54,964.
Based on the latest market data, the average asking price is about $7,667 with a median around $5,326.
The observed spread is roughly $53,494 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 $5,326, 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 $53,494 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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