4.8 Carat Cushion Lab Grown Diamond Prices Comparison
As of April 2026, 4.8 carat cushion lab grown diamonds usually range from $630 to $50,080, with an average price of $5,244.In the last month, prices for these diamonds are up 0.5%.Compare 82 verified listings across 8 retailers tracked by CaratRadar.
4.8 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 82 verified 4.8-carat cushion lab grown diamonds listed across 8 online retailers. Prices in this segment range from $630 to $50,080, with an average asking price of $5,244 and a median of $3,740.
The price spread of $49,450 (98.7% 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.
82 diamonds tracked in this segment
Price range: $630 to $50,080
Average price: $5,244
Median price: $3,740
Available across 8 retailers
Savings potential: up to 98.7%
Price Range Overview
As of Apr 13, 2026Real market range for this carat, shape, and diamond type.
82
$630
$5,244
$3,740
$50,080
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 57.6%GIA | 4.8ct | Cushion | E | VVS2 | Excellent
From $6,645
Compare at $15,690
Save 83.8%GIA | 4.8ct | Cushion | E | VVS2 | Excellent
From $4,456
Compare at $27,590
Save 61.5%GIA | 4.8ct | Cushion | E | VVS1 | Excellent
From $13,344
Compare at $34,680
Save 29.1%GIA | 4.8ct | Cushion | E | VS1 | Excellent
From $5,456
Compare at $7,700
Save 35.2%GIA | 4.8ct | Cushion | D | VVS2 | Ideal
From $13,640
Compare at $21,050
Save 82.8%IGI | 4.8ct | Cushion | F | VVS2 | Ideal
From $1,195
Compare at $6,930
Save 37.4%IGI | 4.8ct | Cushion | D | VVS1 | Ideal
From $10,247
Compare at $16,360
Save 72.3%IGI | 4.8ct | Cushion | D | IF | Excellent
From $12,894
Compare at $46,501
Save 82.2%IGI | 4.8ct | Cushion | G | VVS2 | Excellent
From $1,655
Compare at $9,300
Save 84.5%IGI | 4.8ct | Cushion | E | VVS2 | Very Good
From $1,110
Compare at $7,160
IGI | 4.8ct | Cushion | F | VVS2 | Ideal
From $1,982
Compare at $1,985
Save 71.5%IGI | 4.8ct | Cushion | F | VVS2 | Ideal
From $2,481
Compare at $8,700
IGI | 4.8ct | Cushion | F | VS1 | Very Good
From $1,554
Compare at $1,555
Save 77.3%IGI | 4.8ct | Cushion | F | VS1 | Ideal
From $1,839
Compare at $8,090
Save 78.3%IGI | 4.8ct | Cushion | F | VVS2 | Very Good
From $1,596
Compare at $7,340
Save 77.1%IGI | 4.8ct | Cushion | E | VVS2 | Ideal
From $2,301
Compare at $10,070
IGI | 4.8ct | Cushion | E | VVS2 | Very Good
From $2,223
Compare at $2,225
Save 72.3%IGI | 4.8ct | Cushion | F | VVS2 | Ideal
From $2,880
Compare at $10,380
Save 46.9%IGI | 4.8ct | Cushion | F | VS2 | Ideal
From $2,544
Compare at $4,790
Save 66.3%GIA | 4.81ct | Cushion | D | IF | Ideal
From $18,570
Compare at $55,030
Save 66.3%GIA | 4.81ct | Cushion | D | IF | Very Good
From $18,570
Compare at $55,030
Save 76.6%IGI | 4.81ct | Cushion | E | VS1 | Very Good
From $1,702
Compare at $7,260
Save 76.3%IGI | 4.81ct | Cushion | F | VVS2 | Ideal
From $2,189
Compare at $9,240
Save 70%GIA | 4.82ct | Cushion | D | VS2 | Excellent
From $5,355
Compare at $17,870
Save 51%IGI | 4.82ct | Cushion | H | VS1 | Ideal
From $3,330
Compare at $6,790
Save 62.8%IGI | 4.82ct | Cushion | E | VVS2 | Ideal
From $3,143
Compare at $8,450
Save 74.7%IGI | 4.82ct | Cushion | D | IF | Ideal
From $12,800
Compare at $50,590
Save 64.9%IGI | 4.82ct | Cushion | E | VVS2 | Ideal
From $2,377
Compare at $6,780
Save 83.4%IGI | 4.82ct | Cushion | F | VVS2 | Very Good
From $1,746
Compare at $10,530
Save 64.6%IGI | 4.82ct | Cushion | D | FL | Ideal
From $19,928
Compare at $56,330
Save 59.7%GIA | 4.83ct | Cushion | H | VS1 | Ideal
From $4,115
Compare at $10,200
Save 68.4%GIA | 4.83ct | Cushion | E | VS1 | Ideal
From $8,114
Compare at $25,700
Save 32.1%GIA | 4.83ct | Cushion | D | VVS2 | Ideal
From $13,670
Compare at $20,140
Save 54.7%IGI | 4.83ct | Cushion | H | VVS2 | Ideal
From $3,405
Compare at $7,510
Save 76.4%IGI | 4.83ct | Cushion | E | VVS1 | Ideal
From $3,183
Compare at $13,470
Save 73.2%IGI | 4.83ct | Cushion | D | VVS2 | Ideal
From $5,224
Compare at $19,510
Save 73.4%IGI | 4.83ct | Cushion | D | VVS1 | Ideal
From $6,805
Compare at $25,540
Save 76.1%IGI | 4.83ct | Cushion | F | VS1 | Ideal
From $1,808
Compare at $7,560
Save 65.2%IGI | 4.83ct | Cushion | D | FL | Very Good
From $19,635
Compare at $56,450
Save 72.4%IGI | 4.83ct | Cushion | E | VVS2 | Very Good
From $3,436
Compare at $12,440
Save 72.3%IGI | 4.83ct | Cushion | D | VVS2 | Good
From $4,068
Compare at $14,710
Save 29.8%IGI | 4.83ct | Cushion | E | VS1 | Very Good
From $1,285
Compare at $1,830
Save 69.3%GIA | 4.84ct | Cushion | F | VVS2 | Ideal
From $7,792
Compare at $25,410
Save 14.1%GIA | 4.84ct | Cushion | D | FL | Ideal
From $35,470
Compare at $41,295
Save 49.9%IGI | 4.84ct | Cushion | D | VVS1 | Ideal
From $4,460
Compare at $8,905
Save 29%IGI | 4.84ct | Cushion | E | VVS2 | Very Good
From $1,333
Compare at $1,876
Save 48.7%IGI | 4.84ct | Cushion | E | VS1 | Very Good
From $940
Compare at $1,834
Save 82.1%GIA | 4.85ct | Cushion | E | VS1 | Ideal
From $2,785
Compare at $15,550
Save 76.1%IGI | 4.85ct | Cushion | E | VS2 | Excellent
From $1,873
Compare at $7,820
Save 28.7%IGI | 4.85ct | Cushion | E | VVS2 | Excellent
From $1,325
Compare at $1,859
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 $49,450 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 $3,740 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 82 comparable stones in this segment. Prices start around $630 and go up to $50,080.
Based on the latest market data, the average asking price is about $5,244 with a median around $3,740.
The observed spread is roughly $49,450 across tracked listings, which is about 98.7% 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 $3,740, 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 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 $49,450 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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