8.5 Carat Cushion Lab Grown Diamond Prices Comparison
As of February 2026, 8.5 carat cushion lab grown diamonds usually range from $1,940 to $35,940, with an average price of $3,355.In the last month, prices for these diamonds are down 2.4%.Compare 88 verified listings across 4 retailers tracked by CaratRadar.
8.5 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 88 verified 8.5-carat cushion lab grown diamonds listed across 4 online retailers. Prices in this segment range from $1,940 to $35,940, with an average asking price of $3,355 and a median of $2,580.
The price spread of $34,000 (94.6% 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.
88 diamonds tracked in this segment
Price range: $1,940 to $35,940
Average price: $3,355
Median price: $2,580
Available across 4 retailers
Savings potential: up to 94.6%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
88
$1,940
$3,355
$2,580
$35,940
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%8.45ct | Cushion | E | VVS2 | Excellent
From $2,542
Compare at $8,955
IGISave 88.6%8.45ct | Cushion | E | VS1 | Ideal
From $2,407
Compare at $21,090
IGISave 72%8.45ct | Cushion | F | VVS2 | Excellent
From $2,632
Compare at $9,400
IGISave 71.6%8.45ct | Cushion | E | VVS2 | Excellent
From $2,542
Compare at $8,955
IGISave 71.4%8.45ct | Cushion | E | VVS2 | Excellent
From $2,565
Compare at $8,955
IGISave 71.6%8.46ct | Cushion | E | VVS2 | Excellent
From $2,545
Compare at $8,965
IGISave 86%8.46ct | Cushion | F | VVS2 | Excellent
From $2,635
Compare at $18,860
IGISave 88.6%8.46ct | Cushion | E | VS1 | Very Good
From $2,410
Compare at $21,120
IGISave 71.6%8.46ct | Cushion | E | VVS2 | Excellent
From $2,545
Compare at $8,965
IGISave 81.7%8.46ct | Cushion | H | VVS2 | Very Good
From $3,120
Compare at $17,020
IGISave 82.4%8.46ct | Cushion | D | VS1 | Excellent
From $6,476
Compare at $36,830
IGISave 71.6%8.47ct | Cushion | E | VVS2 | Excellent
From $2,548
Compare at $8,975
IGISave 71.6%8.47ct | Cushion | E | VVS2 | Excellent
From $2,548
Compare at $8,975
IGISave 71.6%8.47ct | Cushion | E | VVS2 | Excellent
From $2,548
Compare at $8,975
IGISave 71.6%8.47ct | Cushion | E | VS1 | Excellent
From $2,781
Compare at $9,780
IGISave 71.6%8.47ct | Cushion | E | VVS2 | Excellent
From $2,548
Compare at $8,975
IGISave 88.6%8.47ct | Cushion | E | VS1 | Very Good
From $2,413
Compare at $21,140
IGISave 85.9%8.47ct | Cushion | E | VS1 | Excellent
From $2,985
Compare at $21,200
IGISave 87.6%8.47ct | Cushion | F | VVS2 | Ideal
From $2,345
Compare at $18,970
IGISave 84.8%8.48ct | Cushion | E | VVS2 | Excellent
From $2,722
Compare at $17,880
IGISave 87.6%8.48ct | Cushion | F | VVS2 | Excellent
From $2,347
Compare at $18,990
IGISave 81.8%8.49ct | Cushion | E | VVS2 | Very Good
From $3,213
Compare at $17,670
IGISave 88.6%8.49ct | Cushion | E | VS1 | Very Good
From $2,418
Compare at $21,190
IGISave 71.4%8.49ct | Cushion | E | VVS2 | Excellent
From $2,577
Compare at $8,995
IGISave 87.6%8.49ct | Cushion | F | VVS2 | Ideal
From $2,350
Compare at $19,010
IGISave 81.5%8.5ct | Cushion | I | VS2 | Ideal
From $2,745
Compare at $14,830
IGISave 71.6%8.5ct | Cushion | E | VVS2 | Excellent
From $2,557
Compare at $9,010
IGISave 82.1%8.5ct | Cushion | E | VS1 | Very Good
From $4,247
Compare at $23,790
IGISave 71.6%8.5ct | Cushion | F | VVS2 | Excellent
From $2,648
Compare at $9,330
IGISave 71.4%8.5ct | Cushion | E | VVS2 | Excellent
From $2,580
Compare at $9,010
IGISave 71.4%8.5ct | Cushion | E | VVS2 | Excellent
From $2,580
Compare at $9,010
IGISave 72.4%8.5ct | Cushion | E | VS1 | Very Good
From $3,691
Compare at $13,360
IGISave 86.6%8.5ct | Cushion | F | VS1 | Ideal
From $2,052
Compare at $15,330
IGISave 87.8%8.5ct | Cushion | F | VVS2 | Ideal
From $2,330
Compare at $19,040
IGISave 81.8%8.51ct | Cushion | H | VS2 | Ideal
From $2,878
Compare at $15,790
IGISave 88.2%8.51ct | Cushion | F | VS1 | Ideal
From $2,074
Compare at $17,610
IGISave 89.6%8.51ct | Cushion | E | VVS2 | Ideal
From $2,228
Compare at $21,420
IGISave 89.6%8.51ct | Cushion | E | VVS2 | Ideal
From $2,228
Compare at $21,420
IGISave 89.9%8.51ct | Cushion | G | VVS2 | Ideal
From $2,234
Compare at $22,110
IGISave 71.4%8.51ct | Cushion | E | VVS2 | Excellent
From $2,583
Compare at $9,020
IGISave 78.1%8.51ct | Cushion | F | VS1 | Ideal
From $4,675
Compare at $21,340
IGISave 83.5%8.51ct | Cushion | E | VS1 | Excellent
From $3,874
Compare at $23,480
IGISave 84.1%8.51ct | Cushion | E | VS2 | Ideal
From $3,012
Compare at $18,930
IGISave 89.6%8.51ct | Cushion | E | VVS2 | Ideal
From $2,228
Compare at $21,420
IGISave 71.4%8.51ct | Cushion | E | VVS2 | Excellent
From $2,583
Compare at $9,020
IGISave 88.9%8.51ct | Cushion | F | VVS2 | Ideal
From $2,103
Compare at $19,020
IGISave 86%8.51ct | Cushion | F | VVS2 | Excellent
From $2,651
Compare at $18,970
IGISave 87.9%8.51ct | Cushion | G | VVS2 | Very Good
From $2,030
Compare at $16,800
IGISave 83%8.51ct | Cushion | H | VS1 | Ideal
From $3,016
Compare at $17,720
IGISave 71.4%8.51ct | Cushion | E | VVS2 | Excellent
From $2,583
Compare at $9,020
Entry pricing in this category starts around $1,940.
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 $34,000 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 $2,580 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 88 comparable stones in this segment. Prices start around $1,940 and go up to $35,940.
Based on the latest market data, the average asking price is about $3,355 with a median around $2,580.
The observed spread is roughly $34,000 across tracked listings, which is about 94.6% 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 $2,580, 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 $34,000 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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