8.5 Carat Cushion Lab Grown Diamond Prices Comparison
As of April 2026, 8.5 carat cushion lab grown diamonds usually range from $1,680 to $35,501, with an average price of $7,384.In the last month, prices for these diamonds are up 0.2%.Compare 86 verified listings across 4 retailers tracked by CaratRadar.
8.5 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 86 verified 8.5-carat cushion lab grown diamonds listed across 4 online retailers. Prices in this segment range from $1,680 to $35,501, with an average asking price of $7,384 and a median of $5,197.
The price spread of $33,821 (95.3% 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.
86 diamonds tracked in this segment
Price range: $1,680 to $35,501
Average price: $7,384
Median price: $5,197
Available across 4 retailers
Savings potential: up to 95.3%
Price Range Overview
As of Apr 14, 2026Real market range for this carat, shape, and diamond type.
86
$1,680
$7,384
$5,197
$35,501
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 | 8.5ct | Cushion | I | VS2 | Ideal
From $6,036
Compare at $14,830
Save 74.3%IGI | 8.5ct | Cushion | E | VS1 | Very Good
From $5,433
Compare at $21,130
Save 86.7%IGI | 8.5ct | Cushion | F | VVS2 | Excellent
From $2,512
Compare at $18,950
Save 73.6%IGI | 8.5ct | Cushion | E | VVS2 | Excellent
From $2,376
Compare at $9,010
Save 86.6%IGI | 8.5ct | Cushion | F | VS1 | Ideal
From $2,352
Compare at $17,610
Save 73.6%IGI | 8.5ct | Cushion | E | VVS2 | Excellent
From $2,376
Compare at $9,010
Save 73.6%IGI | 8.5ct | Cushion | E | VVS2 | Excellent
From $2,376
Compare at $9,010
Save 88.4%IGI | 8.5ct | Cushion | F | VVS2 | Ideal
From $2,217
Compare at $19,040
Save 85%IGI | 8.5ct | Cushion | E | VS1 | Very Good
From $3,176
Compare at $21,130
Save 74.5%IGI | 8.51ct | Cushion | H | VS2 | Ideal
From $4,020
Compare at $15,790
Save 73.4%IGI | 8.51ct | Cushion | F | VS1 | Ideal
From $4,675
Compare at $17,550
Save 64.5%IGI | 8.51ct | Cushion | G | VVS2 | Very Good
From $3,673
Compare at $10,350
Save 76.1%IGI | 8.51ct | Cushion | E | VS1 | Excellent
From $5,507
Compare at $23,020
Save 72.3%IGI | 8.51ct | Cushion | E | VS2 | Ideal
From $4,076
Compare at $14,740
Save 84.8%IGI | 8.51ct | Cushion | E | VVS2 | Ideal
From $3,252
Compare at $21,370
Save 84.8%IGI | 8.51ct | Cushion | E | VVS2 | Ideal
From $3,252
Compare at $21,370
Save 84.1%IGI | 8.51ct | Cushion | G | VVS2 | Ideal
From $2,695
Compare at $16,920
Save 85%IGI | 8.51ct | Cushion | F | VVS2 | Ideal
From $2,871
Compare at $19,120
Save 73.4%IGI | 8.51ct | Cushion | E | VVS2 | Excellent
From $2,401
Compare at $9,020
Save 86.7%IGI | 8.51ct | Cushion | F | VVS2 | Excellent
From $2,515
Compare at $18,970
Save 73.4%IGI | 8.51ct | Cushion | E | VVS2 | Excellent
From $2,401
Compare at $9,020
Save 73.6%IGI | 8.51ct | Cushion | E | VVS2 | Excellent
From $2,378
Compare at $9,020
IGI | 8.52ct | Cushion | H | VS1 | Ideal
From $3,692
Compare at $3,695
Save 74.2%IGI | 8.52ct | Cushion | F | VS2 | Ideal
From $3,895
Compare at $15,070
Save 81.3%IGI | 8.52ct | Cushion | F | VS1 | Very Good
From $3,275
Compare at $17,520
Save 72.4%IGI | 8.52ct | Cushion | E | VS2 | Excellent
From $4,081
Compare at $14,760
Save 73.6%IGI | 8.52ct | Cushion | E | VVS2 | Excellent
From $2,381
Compare at $9,030
Save 71.6%IGI | 8.52ct | Cushion | F | VVS2 | Ideal
From $2,517
Compare at $8,870
Save 73.6%IGI | 8.52ct | Cushion | E | VVS2 | Excellent
From $2,381
Compare at $9,030
Save 83.7%IGI | 8.52ct | Cushion | F | VS1 | Very Good
From $2,496
Compare at $15,290
Save 73.6%IGI | 8.53ct | Cushion | E | VVS2 | Excellent
From $2,384
Compare at $9,040
Save 73.6%IGI | 8.53ct | Cushion | E | VVS2 | Excellent
From $2,384
Compare at $9,040
Save 88.2%IGI | 8.53ct | Cushion | F | VVS2 | Excellent
From $2,247
Compare at $19,100
Save 41.6%IGI | 8.53ct | Cushion | F | VS1 | Very Good
From $2,808
Compare at $4,810
IGI | 8.53ct | Cushion | FANCY | VS2 | Ideal
From $7,666
Compare at $13,305
Save 65.8%GIA | 8.54ct | Cushion | D | VVS1 | Ideal
From $35,406
Compare at $103,600
Save 21.4%GIA | 8.54ct | Cushion | I | VS2 | Very Good
From $4,576
Compare at $5,820
IGI | 8.54ct | Cushion | H | VS2 | Ideal
From $3,524
Compare at $3,525
Save 80.4%IGI | 8.54ct | Cushion | F | VVS2 | Excellent
From $3,736
Compare at $19,030
Save 85%IGI | 8.54ct | Cushion | F | VVS2 | Ideal
From $2,881
Compare at $19,180
Save 85%IGI | 8.54ct | Cushion | F | VVS2 | Ideal
From $2,881
Compare at $19,180
Save 73.6%IGI | 8.54ct | Cushion | E | VVS2 | Excellent
From $2,387
Compare at $9,050
Save 73.6%IGI | 8.54ct | Cushion | E | VVS2 | Excellent
From $2,387
Compare at $9,050
Save 87.8%IGI | 8.54ct | Cushion | E | VS1 | Ideal
From $2,592
Compare at $21,230
Save 87.8%IGI | 8.54ct | Cushion | E | VS1 | Excellent
From $2,592
Compare at $21,230
Save 73.6%IGI | 8.54ct | Cushion | E | VVS2 | Excellent
From $2,387
Compare at $9,050
IGI | 8.54ct | Cushion | FANCY | VS2 | Ideal
From $7,355
Compare at $12,766
Save 73.6%IGI | 8.54ct | Cushion | E | VVS2 | Excellent
From $2,387
Compare at $9,050
IGI | 8.54ct | Cushion | FANCY | VS1 | Excellent
From $6,076
Compare at $10,546
Save 79.4%IGI | 8.54ct | Cushion | E | VVS2 | Very Good
From $4,422
Compare at $21,440
Entry pricing in this category starts around $1,680.
What to Know When Shopping for 8.5 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $33,821 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 $5,197 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 86 comparable stones in this segment. Prices start around $1,680 and go up to $35,501.
Based on the latest market data, the average asking price is about $7,384 with a median around $5,197.
The observed spread is roughly $33,821 across tracked listings, which is about 95.3% 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 $5,197, 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 $33,821 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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