4.8 Carat Cushion Lab Grown Diamond Prices Comparison
As of February 2026, 4.8 carat cushion lab grown diamonds usually range from $890 to $41,350, with an average price of $4,485.In the last month, prices for these diamonds are down 2.1%.Compare 125 verified listings across 10 retailers tracked by CaratRadar.
4.8 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 125 verified 4.8-carat cushion lab grown diamonds listed across 10 online retailers. Prices in this segment range from $890 to $41,350, with an average asking price of $4,485 and a median of $2,485.
The price spread of $40,460 (97.8% 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.
125 diamonds tracked in this segment
Price range: $890 to $41,350
Average price: $4,485
Median price: $2,485
Available across 10 retailers
Savings potential: up to 97.8%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
125
$890
$4,485
$2,485
$41,350
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 85.5%4.75ct | Cushion | F | VS2 | Very Good
From $1,196
Compare at $8,230
IGISave 32.5%4.75ct | Cushion | D | VS1 | Very Good
From $2,196
Compare at $3,255
IGISave 85%4.75ct | Cushion | E | VVS2 | Excellent
From $1,554
Compare at $10,380
IGISave 86.8%4.75ct | Cushion | E | VVS2 | Good
From $1,099
Compare at $8,340
GIASave 22.2%4.75ct | Cushion | D | FL | Ideal
From $41,350
Compare at $53,158
IGISave 84.7%4.75ct | Cushion | G | VS1 | Ideal
From $1,395
Compare at $9,100
IGISave 75.6%4.75ct | Cushion | G | VS2 | Very Good
From $1,308
Compare at $5,360
IGISave 85.4%4.75ct | Cushion | H | VS1 | Ideal
From $1,379
Compare at $9,470
IGISave 71.2%4.75ct | Cushion | E | VS1 | Very Good
From $2,575
Compare at $8,950
IGISave 73.8%4.75ct | Cushion | F | IF | Ideal
From $6,427
Compare at $24,521
IGISave 82.1%4.75ct | Cushion | E | VVS2 | Excellent
From $1,814
Compare at $10,150
IGISave 74.2%4.75ct | Cushion | D | VVS2 | Ideal
From $3,464
Compare at $13,450
IGISave 75.9%4.75ct | Cushion | G | VVS2 | Ideal
From $1,457
Compare at $6,040
IGISave 59.7%4.75ct | Cushion | F | VS1 | Ideal
From $2,676
Compare at $6,640
IGISave 84.1%4.75ct | Cushion | E | VVS1 | Excellent
From $5,070
Compare at $31,870
IGISave 80%4.75ct | Cushion | F | VS1 | Ideal
From $1,770
Compare at $8,835
GIASave 82%4.75ct | Cushion | E | VS1 | Excellent
From $3,634
Compare at $20,200
GIASave 54.8%4.75ct | Cushion | F | VS1 | Ideal
From $5,375
Compare at $11,890
GIASave 31.2%4.75ct | Cushion | D | IF | Ideal
From $18,335
Compare at $26,667
IGISave 88.3%4.75ct | Cushion | F | VS1 | Excellent
From $1,132
Compare at $9,670
IGISave 83.4%4.76ct | Cushion | D | VS1 | Ideal
From $1,976
Compare at $11,920
IGISave 49.6%4.76ct | Cushion | F | VS1 | Very Good
From $2,386
Compare at $4,731
IGISave 82%4.76ct | Cushion | G | SI1 | Very Good
From $1,204
Compare at $6,680
IGISave 84.4%4.76ct | Cushion | E | VVS2 | Very Good
From $1,235
Compare at $7,930
IGISave 49.5%4.76ct | Cushion | E | VVS1 | Ideal
From $2,501
Compare at $4,950
IGISave 52.2%4.76ct | Cushion | E | VS1 | Very Good
From $1,668
Compare at $3,493
GIASave 82.9%4.76ct | Cushion | D | VVS1 | Excellent
From $5,199
Compare at $30,420
GIASave 57.1%4.76ct | Cushion | E | VS1 | Ideal
From $7,120
Compare at $16,580
GIASave 47.8%4.76ct | Cushion | E | SI1 | Ideal
From $5,026
Compare at $9,630
IGISave 83.6%4.77ct | Cushion | D | VVS2 | Excellent
From $2,212
Compare at $13,500
IGISave 29.4%4.77ct | Cushion | E | VS1 | Very Good
From $1,828
Compare at $2,590
IGISave 80.8%4.77ct | Cushion | D | IF | Ideal
From $10,290
Compare at $53,640
IGISave 81.5%4.77ct | Cushion | D | IF | Ideal
From $9,907
Compare at $53,640
IGISave 74.9%4.77ct | Cushion | F | SI1 | Ideal
From $1,899
Compare at $7,560
IGISave 74.9%4.77ct | Cushion | D | VS1 | Ideal
From $1,222
Compare at $4,865
GIASave 73.4%4.77ct | Cushion | D | IF | Excellent
From $13,128
Compare at $49,320
IGISave 64.2%4.77ct | Cushion | FANCY | VS2 | Ideal
From $1,068
Compare at $2,982
IGISave 61.7%4.78ct | Cushion | F | VS1 | Ideal
From $2,694
Compare at $7,040
IGISave 81.9%4.78ct | Cushion | D | VVS2 | Ideal
From $3,119
Compare at $17,190
IGISave 81.1%4.78ct | Cushion | E | VVS2 | Very Good
From $2,176
Compare at $11,500
GIASave 17.5%4.78ct | Cushion | E | VVS1 | Ideal
From $10,894
Compare at $13,200
IGISave 75.8%4.78ct | Cushion | D | VVS2 | Ideal
From $2,027
Compare at $8,390
IGISave 81.1%4.78ct | Cushion | E | VVS2 | Very Good
From $2,176
Compare at $11,500
IGISave 32.8%4.78ct | Cushion | FANCY | VS1 | Very Good
From $4,207
Compare at $6,264
GIASave 82.2%4.78ct | Cushion | E | VVS2 | Excellent
From $4,477
Compare at $25,140
IGISave 68.5%4.78ct | Cushion | D | VVS1 | Very Good
From $4,862
Compare at $15,450
IGISave 55.6%4.78ct | Cushion | F | VS1 | Ideal
From $2,653
Compare at $5,980
IGISave 36.1%4.78ct | Cushion | D | VVS1 | Very Good
From $6,202
Compare at $9,711
IGISave 74.9%4.78ct | Cushion | D | VS1 | Ideal
From $1,224
Compare at $4,875
IGISave 65.7%4.78ct | Cushion | F | VS1 | Ideal
From $2,170
Compare at $6,330
Entry pricing in this category starts around $890.
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 $40,460 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 $2,485 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 125 comparable stones in this segment. Prices start around $890 and go up to $41,350.
Based on the latest market data, the average asking price is about $4,485 with a median around $2,485.
The observed spread is roughly $40,460 across tracked listings, which is about 97.8% 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 $2,485, 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 10 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 $40,460 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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