4.8 Carat Cushion Lab Grown Diamond Prices Comparison
As of May 2026, 4.8 carat cushion lab grown diamonds usually range from $630 to $44,711, with an average price of $5,105.In the last month, prices for these diamonds are down 4.2%.Compare 74 verified listings across 8 retailers tracked by CaratRadar.
4.8 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 74 verified 4.8-carat cushion lab grown diamonds listed across 8 online retailers. Prices in this segment range from $630 to $44,711, with an average asking price of $5,105 and a median of $3,540.
The price spread of $44,081 (98.6% 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.
74 diamonds tracked in this segment
Price range: $630 to $44,711
Average price: $5,105
Median price: $3,540
Available across 8 retailers
Savings potential: up to 98.6%
Price Range Overview
As of May 30, 2026Real market range for this carat, shape, and diamond type.
74
$630
$5,105
$3,540
$44,711
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 69.3%IGI | 4.85ct | Cushion | F | VS1 | Excellent
From $838
Compare at $2,732
Save 72.6%IGI | 4.88ct | Cushion | E | VS2 | Excellent
From $853
Compare at $3,116
Save 67.7%IGI | 4.84ct | Cushion | E | VS1 | Very Good
From $951
Compare at $2,943
Save 67.4%IGI | 4.83ct | Cushion | E | VS1 | Very Good
From $955
Compare at $2,931
IGI | 4.87ct | Cushion | E | VS1 | Very Good
From $957
Compare at $2,978
Save 66.9%IGI | 4.81ct | Cushion | E | VS1 | Very Good
From $963
Compare at $2,910
IGI | 4.9ct | Cushion | E | VS1 | Very Good
From $963
Compare at $3,013
Save 63.7%IGI | 4.81ct | Cushion | F | VVS2 | Very Good
From $973
Compare at $2,680
Save 65.7%IGI | 4.86ct | Cushion | E | VVS2 | Very Good
From $1,025
Compare at $2,991
Save 65%IGI | 4.81ct | Cushion | E | VS1 | Very Good
From $1,025
Compare at $2,925
Save 65.5%IGI | 4.84ct | Cushion | E | VVS2 | Very Good
From $1,025
Compare at $2,968
Save 64.8%IGI | 4.8ct | Cushion | E | VVS2 | Very Good
From $1,029
Compare at $2,922
Save 65.7%IGI | 4.87ct | Cushion | E | VVS2 | Very Good
From $1,030
Compare at $3,002
Save 65.3%IGI | 4.85ct | Cushion | E | VVS2 | Excellent
From $1,033
Compare at $2,977
Save 65.5%IGI | 4.88ct | Cushion | E | VVS2 | Very Good
From $1,040
Compare at $3,016
IGI | 4.84ct | Cushion | E | VVS2 | Very Good
From $1,041
Compare at $2,968
Save 65.2%IGI | 4.87ct | Cushion | E | VVS2 | Very Good
From $1,044
Compare at $3,002
Save 65.2%IGI | 4.87ct | Cushion | E | VVS2 | Very Good
From $1,044
Compare at $3,002
Save 65%IGI | 4.86ct | Cushion | E | VVS2 | Excellent
From $1,046
Compare at $2,991
Save 65.3%IGI | 4.88ct | Cushion | E | VVS2 | Very Good
From $1,046
Compare at $3,015
Save 65.2%IGI | 4.88ct | Cushion | E | VVS2 | Excellent
From $1,050
Compare at $3,015
Save 78.2%IGI | 4.87ct | Cushion | G | VS1 | Very Good
From $1,056
Compare at $4,850
IGI | 4.9ct | Cushion | E | VVS2 | Very Good
From $1,061
Compare at $3,041
Save 61.2%IGI | 4.9ct | Cushion | F | VS1 | Very Good
From $1,093
Compare at $2,816
Save 58.8%IGI | 4.8ct | Cushion | F | VS1 | Very Good
From $1,130
Compare at $2,740
Save 62%IGI | 4.89ct | Cushion | E | VS1 | Very Good
From $1,160
Compare at $3,054
Save 57.1%IGI | 4.86ct | Cushion | F | VVS2 | Excellent
From $1,170
Compare at $2,725
Save 69.5%IGI | 4.8ct | Cushion | E | VVS2 | Very Good
From $1,205
Compare at $3,946
IGI | 4.8ct | Cushion | F | VS1 | Very Good
From $1,212
Compare at $1,228
Save 72.9%IGI | 4.8ct | Cushion | FANCY | VVS2 | Very Good
From $1,264
Compare at $4,658
IGI | 4.83ct | Cushion | F | VS1 | Very Good
From $1,291
Compare at $1,298
Save 51.9%IGI | 4.9ct | Cushion | F | VVS2 | Very Good
From $1,334
Compare at $2,771
Save 52.7%IGI | 4.86ct | Cushion | F | VVS2 | Good
From $1,356
Compare at $2,869
Save 56.7%IGI | 4.9ct | Cushion | E | VS1 | Very Good
From $1,362
Compare at $3,143
Save 79.8%IGI | 4.86ct | Cushion | F | VVS2 | Very Good
From $1,413
Compare at $6,990
Save 78.2%IGI | 4.85ct | Cushion | F | VVS2 | Excellent
From $1,425
Compare at $6,550
Save 53.8%IGI | 4.8ct | Cushion | E | VVS2 | Very Good
From $1,428
Compare at $3,093
Save 53.4%IGI | 4.81ct | Cushion | E | VVS2 | Very Good
From $1,460
Compare at $3,134
Save 76.2%IGI | 4.86ct | Cushion | G | VVS2 | Ideal
From $1,472
Compare at $6,190
Save 61.7%IGI | 4.9ct | Cushion | D | VVS2 | Very Good
From $1,573
Compare at $4,112
Save 62.7%IGI | 4.86ct | Cushion | D | VS1 | Very Good
From $1,613
Compare at $4,321
Save 57.2%IGI | 4.81ct | Cushion | D | VVS2 | Very Good
From $1,709
Compare at $3,996
Save 72.7%IGI | 4.83ct | Cushion | FANCY | VS1 | Excellent
From $1,729
Compare at $6,327
Save 24.1%IGI | 4.87ct | Cushion | E | VVS2 | Very Good
From $1,866
Compare at $2,459
Save 44.7%IGI | 4.9ct | Cushion | D | VS1 | Very Good
From $1,924
Compare at $3,481
Save 62.1%IGI | 4.84ct | Cushion | FANCY | VS2 | Very Good
From $1,932
Compare at $5,093
Save 39.9%IGI | 4.86ct | Cushion | E | VVS2 | Very Good
From $2,123
Compare at $3,534
Save 74.9%IGI | 4.87ct | Cushion | FANCY | VS1 | Ideal
From $2,163
Compare at $8,630
Save 37.4%IGI | 4.89ct | Cushion | E | VVS2 | Very Good
From $2,179
Compare at $3,479
Save 47.4%IGI | 4.81ct | Cushion | D | VVS2 | Excellent
From $2,184
Compare at $4,150
Entry pricing in this category starts around $630.
What to Know When Shopping for 4.8 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $44,081 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 $3,540 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 74 comparable stones in this segment. Prices start around $630 and go up to $44,711.
Based on the latest market data, the average asking price is about $5,105 with a median around $3,540.
The observed spread is roughly $44,081 across tracked listings, which is about 98.6% from highest to lowest offer in this bucket.
We refresh pricing data daily so these pages stay current with market changes.
Based on completed market data, the fair market benchmark is $5,105. The median price is $3,540, so offers between the median and fair benchmark can be reasonable, while reputable listings below the median may be especially competitive.
We currently track this stone category across 8 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 $44,081 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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