8.4 Carat Cushion Lab Grown Diamond Prices Comparison
As of February 2026, 8.4 carat cushion lab grown diamonds usually range from $1,867 to $4,598, with an average price of $2,597.In the last month, prices for these diamonds are down 2.1%.Compare 46 verified listings across 2 retailers tracked by CaratRadar.
8.4 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 46 verified 8.4-carat cushion lab grown diamonds listed across 2 online retailers. Prices in this segment range from $1,867 to $4,598, with an average asking price of $2,597 and a median of $2,538.
The price spread of $2,731 (59.4% 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: $1,867 to $4,598
Average price: $2,597
Median price: $2,538
Available across 2 retailers
Savings potential: up to 59.4%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
46
$1,867
$2,597
$2,538
$4,598
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 86.8%8.35ct | Cushion | E | VVS2 | Excellent
From $2,223
Compare at $16,830
IGISave 81.6%8.35ct | Cushion | E | VS1 | Very Good
From $3,113
Compare at $16,950
IGISave 85.8%8.35ct | Cushion | E | VS1 | Excellent
From $2,976
Compare at $20,910
IGISave 76.2%8.36ct | Cushion | G | VS1 | Excellent
From $2,172
Compare at $9,130
IGISave 88.1%8.36ct | Cushion | E | VVS2 | Ideal
From $2,493
Compare at $20,990
IGISave 71.6%8.37ct | Cushion | E | VVS2 | Ideal
From $2,518
Compare at $8,870
IGISave 85.8%8.37ct | Cushion | E | VS1 | Excellent
From $2,697
Compare at $19,000
IGISave 78.1%8.37ct | Cushion | F | VS1 | Ideal
From $4,598
Compare at $21,010
IGISave 86.9%8.38ct | Cushion | G | VS2 | Ideal
From $2,107
Compare at $16,070
IGISave 71.6%8.38ct | Cushion | E | VVS2 | Very Good
From $2,521
Compare at $8,880
IGISave 88.5%8.38ct | Cushion | E | VS1 | Very Good
From $2,409
Compare at $20,880
8.38ct | Cushion | F | VVS2 | Excellent
From $1,867
Compare at $18,680
IGISave 82.6%8.38ct | Cushion | E | VS1 | Ideal
From $4,291
Compare at $24,710
IGISave 71.4%8.38ct | Cushion | E | VVS2 | Excellent
From $2,544
Compare at $8,880
IGISave 24.3%8.39ct | Cushion | F | VS2 | Ideal
From $2,322
Compare at $3,068
IGISave 63%8.39ct | Cushion | E | VS2 | Ideal
From $2,515
Compare at $6,795
IGISave 71.6%8.39ct | Cushion | E | VVS2 | Very Good
From $2,524
Compare at $8,890
IGISave 71.4%8.39ct | Cushion | E | VVS2 | Excellent
From $2,547
Compare at $8,890
IGISave 71.4%8.39ct | Cushion | E | VVS2 | Excellent
From $2,547
Compare at $8,890
IGISave 71.6%8.4ct | Cushion | E | VVS2 | Ideal
From $2,527
Compare at $8,900
IGISave 71.6%8.4ct | Cushion | E | VVS2 | Excellent
From $2,527
Compare at $8,900
IGISave 70.4%8.4ct | Cushion | FANCY | VS1 | Very Good
From $2,748
Compare at $9,282
IGISave 71.4%8.4ct | Cushion | E | VVS2 | Excellent
From $2,550
Compare at $8,900
IGISave 86.4%8.4ct | Cushion | E | VS1 | Ideal
From $2,706
Compare at $19,840
IGISave 87.6%8.4ct | Cushion | F | VVS2 | Excellent
From $2,325
Compare at $18,810
IGISave 71.4%8.41ct | Cushion | E | VVS2 | Excellent
From $2,553
Compare at $8,910
IGISave 71.4%8.41ct | Cushion | E | VVS2 | Excellent
From $2,553
Compare at $8,910
IGISave 71.4%8.41ct | Cushion | E | VVS2 | Excellent
From $2,553
Compare at $8,910
IGISave 71.6%8.42ct | Cushion | E | VVS2 | Excellent
From $2,533
Compare at $8,925
IGISave 71.4%8.42ct | Cushion | E | VVS2 | Excellent
From $2,556
Compare at $8,925
IGISave 87.6%8.42ct | Cushion | F | VVS2 | Excellent
From $2,331
Compare at $18,860
IGISave 88.5%8.42ct | Cushion | E | VS1 | Ideal
From $2,421
Compare at $21,030
IGISave 71.6%8.42ct | Cushion | E | VVS2 | Ideal
From $2,533
Compare at $8,925
IGISave 81.3%8.42ct | Cushion | E | VVS2 | Ideal
From $2,133
Compare at $11,420
8.42ct | Cushion | E | VS1 | Excellent
From $2,713
Compare at $20,930
IGISave 71.6%8.42ct | Cushion | E | VVS2 | Excellent
From $2,533
Compare at $8,925
IGISave 81.6%8.43ct | Cushion | I | VVS2 | Very Good
From $2,961
Compare at $16,090
IGISave 71.6%8.43ct | Cushion | E | VVS2 | Excellent
From $2,536
Compare at $8,935
IGISave 71.4%8.43ct | Cushion | E | VVS2 | Excellent
From $2,559
Compare at $8,935
IGISave 88.5%8.43ct | Cushion | E | VS1 | Ideal
From $2,424
Compare at $21,050
IGISave 71.4%8.43ct | Cushion | E | VVS2 | Excellent
From $2,559
Compare at $8,935
IGISave 71.4%8.43ct | Cushion | E | VVS2 | Excellent
From $2,559
Compare at $8,935
IGISave 87.6%8.43ct | Cushion | F | VVS2 | Ideal
From $2,334
Compare at $18,880
IGISave 85.1%8.43ct | Cushion | G | VS1 | Ideal
From $2,654
Compare at $17,840
IGISave 71.6%8.44ct | Cushion | E | VVS2 | Ideal
From $2,539
Compare at $8,945
IGISave 71.4%8.44ct | Cushion | E | VVS2 | Excellent
From $2,562
Compare at $8,945
Entry pricing in this category starts around $1,867.
What to Know When Shopping for 8.4 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $2,731 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 $2,538 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 $1,867 and go up to $4,598.
Based on the latest market data, the average asking price is about $2,597 with a median around $2,538.
The observed spread is roughly $2,731 across tracked listings, which is about 59.4% 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 $2,538, 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 2 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 $2,731 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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