4 Carat Cushion Lab Grown Diamond Prices Comparison
As of February 2026, 4 carat cushion lab grown diamonds usually range from $769 to $68,529, with an average price of $2,803.In the last month, prices for these diamonds are down 3.6%.Compare 1,724 verified listings across 12 retailers tracked by CaratRadar.
4 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 1,724 verified 4-carat cushion lab grown diamonds listed across 12 online retailers. Prices in this segment range from $769 to $68,529, with an average asking price of $2,803 and a median of $1,436.
The price spread of $67,760 (98.9% 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.
1,724 diamonds tracked in this segment
Price range: $769 to $68,529
Average price: $2,803
Median price: $1,436
Available across 12 retailers
Savings potential: up to 98.9%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
1,724
$769
$2,803
$1,436
$68,529
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
GIASave 51.5%3.96ct | Cushion | G | VS1 | Ideal
From $2,150
Compare at $4,430
IGISave 60.7%3.96ct | Cushion | E | VVS1 | Ideal
From $3,051
Compare at $7,770
GIASave 78.5%3.96ct | Cushion | D | FL | Excellent
From $16,583
Compare at $77,240
IGISave 77.8%3.96ct | Cushion | G | VS1 | Ideal
From $920
Compare at $4,140
IGISave 82%3.96ct | Cushion | D | IF | Very Good
From $4,908
Compare at $27,250
IGISave 65.1%3.96ct | Cushion | E | VVS2 | Excellent
From $3,137
Compare at $9,000
IGISave 76.8%3.96ct | Cushion | E | VS1 | Ideal
From $1,984
Compare at $8,570
IGISave 83.7%3.96ct | Cushion | F | VVS2 | Very Good
From $1,484
Compare at $9,120
IGISave 84.9%3.96ct | Cushion | E | VS1 | Ideal
From $1,676
Compare at $11,070
IGISave 81.5%3.96ct | Cushion | F | VVS1 | Ideal
From $1,784
Compare at $9,640
IGISave 84.2%3.96ct | Cushion | G | SI1 | Ideal
From $896
Compare at $5,690
IGISave 89.8%3.96ct | Cushion | E | VS1 | Ideal
From $1,008
Compare at $9,870
IGISave 52.5%3.96ct | Cushion | FANCY | VVS2 | Very Good
From $2,146
Compare at $4,519
GIASave 74.4%3.97ct | Cushion | G | VVS2 | Ideal
From $2,826
Compare at $11,020
IGISave 77.9%3.97ct | Cushion | E | VS1 | Very Good
From $2,392
Compare at $10,830
IGISave 19.6%3.97ct | Cushion | D | VVS2 | Very Good
From $1,339
Compare at $1,665
IGISave 85.1%3.97ct | Cushion | G | VS1 | Excellent
From $1,200
Compare at $8,040
GIASave 65.2%3.97ct | Cushion | D | IF | Very Good
From $13,170
Compare at $37,836
IGISave 86.7%3.97ct | Cushion | E | VVS2 | Very Good
From $1,266
Compare at $9,550
IGISave 86.7%3.97ct | Cushion | E | VVS2 | Very Good
From $1,266
Compare at $9,550
IGISave 85.3%3.97ct | Cushion | F | VVS2 | Very Good
From $1,225
Compare at $8,360
IGISave 77.7%3.97ct | Cushion | D | VS1 | Very Good
From $1,302
Compare at $5,840
GIASave 21%3.97ct | Cushion | D | FL | Ideal
From $30,090
Compare at $38,106
IGISave 19.6%3.97ct | Cushion | D | VVS2 | Very Good
From $1,339
Compare at $1,665
IGISave 98.2%3.98ct | Cushion | F | SI1 | Excellent
From $1,438
Compare at $79,600
IGISave 71.9%3.98ct | Cushion | D | VVS2 | Ideal
From $1,920
Compare at $6,840
GIASave 54.8%3.98ct | Cushion | D | VVS2 | Excellent
From $5,011
Compare at $11,080
IGISave 59.5%3.98ct | Cushion | FANCY | VS1 | Excellent
From $4,312
Compare at $10,636
IGISave 86.7%3.98ct | Cushion | E | VVS2 | Very Good
From $1,269
Compare at $9,570
IGISave 69.6%3.98ct | Cushion | E | VVS2 | Very Good
From $1,281
Compare at $4,215
IGISave 42%3.98ct | Cushion | E | VS1 | Very Good
From $3,300
Compare at $5,690
IGISave 78.5%3.98ct | Cushion | E | VVS2 | Very Good
From $1,269
Compare at $5,900
GIASave 43.1%3.98ct | Cushion | D | VS1 | Excellent
From $3,938
Compare at $6,926
IGISave 69.1%3.98ct | Cushion | I | VS1 | Ideal
From $893
Compare at $2,890
3.98ct | Cushion | E | VS2 | Excellent
From $1,082
Compare at $4,910
IGISave 78.3%3.98ct | Cushion | E | VVS2 | Very Good
From $1,281
Compare at $5,900
IGISave 82.5%3.98ct | Cushion | E | VVS2 | Very Good
From $1,281
Compare at $7,300
IGISave 86.7%3.98ct | Cushion | E | VVS2 | Very Good
From $1,269
Compare at $9,570
IGISave 86.4%3.98ct | Cushion | E | VVS2 | Very Good
From $1,293
Compare at $9,520
IGISave 74.3%3.99ct | Cushion | E | VS2 | Very Good
From $1,480
Compare at $5,750
IGISave 71.3%3.99ct | Cushion | D | VVS2 | Ideal
From $2,997
Compare at $10,460
IGISave 75.5%3.99ct | Cushion | E | VS1 | Ideal
From $1,657
Compare at $6,760
IGISave 88.4%3.99ct | Cushion | F | VVS2 | Excellent
From $982
Compare at $8,450
IGISave 57.4%3.99ct | Cushion | D | VVS2 | Very Good
From $3,069
Compare at $7,195
IGISave 80.8%3.99ct | Cushion | E | VS1 | Excellent
From $1,657
Compare at $8,640
GIASave 58.5%3.99ct | Cushion | D | VS1 | Excellent
From $3,947
Compare at $9,520
GIASave 21%3.99ct | Cushion | D | FL | Ideal
From $30,240
Compare at $38,298
IGISave 56.6%3.99ct | Cushion | FANCY | VS1 | Excellent
From $2,507
Compare at $5,773
IGISave 60.2%3.99ct | Cushion | D | VS1 | Ideal
From $2,339
Compare at $5,870
3.99ct | Cushion | F | VS1 | Excellent
From $1,153
Compare at $3,030
Entry pricing in this category starts around $769.
What to Know When Shopping for 4 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $67,760 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 $1,436 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 1,724 comparable stones in this segment. Prices start around $769 and go up to $68,529.
Based on the latest market data, the average asking price is about $2,803 with a median around $1,436.
The observed spread is roughly $67,760 across tracked listings, which is about 98.9% 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 $1,436, 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 12 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 $67,760 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.
Related Price Categories
Explore adjacent carat ranges and shapes to compare market shifts.
3.9 Carat Cushion Lab Grown Diamond Prices
4.1 Carat Cushion Lab Grown Diamond Prices
3.8 Carat Cushion Lab Grown Diamond Prices
4.2 Carat Cushion Lab Grown Diamond Prices
3.7 Carat Cushion Lab Grown Diamond Prices
4.3 Carat Cushion Lab Grown Diamond Prices
3.6 Carat Cushion Lab Grown Diamond Prices
4 Carat Round Lab Grown Diamond Prices
4 Carat Radiant Lab Grown Diamond Prices
4 Carat Oval Lab Grown Diamond Prices
4 Carat Emerald Lab Grown Diamond Prices
4 Carat Pear Lab Grown Diamond Prices
Tracking Lab Grown inventory for 4 carat Cushion diamonds.