8.6 Carat Cushion Lab Grown Diamond Prices Comparison
As of April 2026, 8.6 carat cushion lab grown diamonds usually range from $1,680 to $35,493, with an average price of $7,368.In the last month, prices for these diamonds are down 0.1%.Compare 37 verified listings across 5 retailers tracked by CaratRadar.
8.6 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 37 verified 8.6-carat cushion lab grown diamonds listed across 5 online retailers. Prices in this segment range from $1,680 to $35,493, with an average asking price of $7,368 and a median of $5,185.
The price spread of $33,813 (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.
37 diamonds tracked in this segment
Price range: $1,680 to $35,493
Average price: $7,368
Median price: $5,185
Available across 5 retailers
Savings potential: up to 95.3%
Price Range Overview
As of Apr 15, 2026Real market range for this carat, shape, and diamond type.
37
$1,680
$7,368
$5,185
$35,493
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 25.3%IGI | 8.6ct | Cushion | H | VS2 | Ideal
From $3,549
Compare at $4,748
Save 80.2%IGI | 8.6ct | Cushion | E | VVS2 | Excellent
From $4,290
Compare at $21,640
Save 73.6%IGI | 8.6ct | Cushion | E | VVS2 | Excellent
From $2,403
Compare at $9,115
Save 73.6%IGI | 8.6ct | Cushion | E | VVS2 | Excellent
From $2,403
Compare at $9,115
Save 61.1%IGI | 8.6ct | Cushion | FANCY | VVS2 | Very Good
From $8,759
Compare at $22,539
Save 73.6%IGI | 8.6ct | Cushion | E | VVS2 | Excellent
From $2,403
Compare at $9,115
Save 73.6%IGI | 8.6ct | Cushion | E | VVS2 | Excellent
From $2,403
Compare at $9,115
Save 75.1%GIA | 8.61ct | Cushion | I | VS1 | Ideal
From $4,580
Compare at $18,400
Save 73.4%IGI | 8.61ct | Cushion | F | VS1 | Ideal
From $4,730
Compare at $17,760
Save 82.8%IGI | 8.61ct | Cushion | G | VVS2 | Good
From $2,941
Compare at $17,130
Save 80.2%IGI | 8.61ct | Cushion | E | VVS2 | Very Good
From $4,295
Compare at $21,670
Save 73.6%IGI | 8.61ct | Cushion | E | VVS2 | Excellent
From $2,406
Compare at $9,125
Save 73.6%IGI | 8.61ct | Cushion | E | VVS2 | Excellent
From $2,406
Compare at $9,125
Save 88.2%IGI | 8.61ct | Cushion | F | VVS2 | Excellent
From $2,268
Compare at $19,280
Save 73.6%IGI | 8.61ct | Cushion | E | VVS2 | Excellent
From $2,406
Compare at $9,125
Save 74.9%IGI | 8.62ct | Cushion | G | VS1 | Ideal
From $4,375
Compare at $17,410
Save 84.8%IGI | 8.62ct | Cushion | F | VVS2 | Excellent
From $2,314
Compare at $15,180
Save 80%IGI | 8.62ct | Cushion | E | VS1 | Very Good
From $4,300
Compare at $21,480
Save 87.8%IGI | 8.62ct | Cushion | E | VS1 | Ideal
From $2,616
Compare at $21,430
Save 89.1%IGI | 8.62ct | Cushion | E | VS1 | Ideal
From $2,340
Compare at $21,520
Save 81.2%IGI | 8.63ct | Cushion | E | VVS2 | Ideal
From $4,075
Compare at $21,720
Save 73.6%IGI | 8.63ct | Cushion | E | VVS2 | Excellent
From $2,412
Compare at $9,145
Save 73.6%IGI | 8.63ct | Cushion | E | VVS2 | Excellent
From $2,412
Compare at $9,145
Save 89.1%IGI | 8.63ct | Cushion | E | VS1 | Ideal
From $2,343
Compare at $21,540
Save 73.6%IGI | 8.64ct | Cushion | E | VVS2 | Excellent
From $2,414
Compare at $9,155
Save 35.2%IGI | 8.65ct | Cushion | F | VVS2 | Very Good
From $3,034
Compare at $4,682
Save 89.2%IGI | 8.65ct | Cushion | E | VS1 | Ideal
From $2,325
Compare at $21,590
Save 73.6%IGI | 8.65ct | Cushion | E | VVS2 | Excellent
From $2,417
Compare at $9,165
Save 14.3%IGI | 8.66ct | Cushion | E | VVS2 | Ideal
From $3,949
Compare at $4,606
Save 73.4%IGI | 8.66ct | Cushion | E | VVS2 | Excellent
From $2,443
Compare at $9,175
Save 73.4%IGI | 8.66ct | Cushion | E | VVS2 | Excellent
From $2,443
Compare at $9,175
Save 55.3%IGI | 8.67ct | Cushion | G | VS2 | Very Good
From $5,202
Compare at $11,640
Save 74.7%IGI | 8.67ct | Cushion | E | VVS2 | Excellent
From $2,450
Compare at $9,680
Save 77.3%IGI | 8.68ct | Cushion | F | VS1 | Ideal
From $4,060
Compare at $17,900
Save 64.3%IGI | 8.68ct | Cushion | F | VS2 | Ideal
From $2,354
Compare at $6,595
Save 71.6%GIA | 8.69ct | Cushion | H | VS1 | Very Good
From $5,412
Compare at $19,048
Save 74.7%IGI | 8.69ct | Cushion | E | VVS2 | Excellent
From $2,455
Compare at $9,700
Entry pricing in this category starts around $1,680.
What to Know When Shopping for 8.6 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $33,813 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 $5,185 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 37 comparable stones in this segment. Prices start around $1,680 and go up to $35,493.
Based on the latest market data, the average asking price is about $7,368 with a median around $5,185.
The observed spread is roughly $33,813 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 $5,185, 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 5 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 $33,813 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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