4 Carat Cushion Lab Grown Diamond Prices Comparison
As of April 2026, 4 carat cushion lab grown diamonds usually range from $144 to $27,812, with an average price of $3,794.In the last month, prices for these diamonds are up 0.4%.Compare 2,778 verified listings across 12 retailers tracked by CaratRadar.
4 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 2,778 verified 4-carat cushion lab grown diamonds listed across 12 online retailers. Prices in this segment range from $144 to $27,812, with an average asking price of $3,794 and a median of $2,590.
The price spread of $27,668 (99.5% 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.
2,778 diamonds tracked in this segment
Price range: $144 to $27,812
Average price: $3,794
Median price: $2,590
Available across 12 retailers
Savings potential: up to 99.5%
Price Range Overview
As of Apr 13, 2026Real market range for this carat, shape, and diamond type.
2,778
$144
$3,794
$2,590
$27,812
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 77.8%GCAL | 4ct | Cushion | F | VVS2 | Excellent
From $1,796
Compare at $8,080
Save 66.6%GIA | 4ct | Cushion | D | VVS1 | Excellent
From $8,095
Compare at $24,220
Save 72.5%GIA | 4ct | Cushion | E | VVS2 | Excellent
From $4,089
Compare at $14,850
Save 66.8%GIA | 4ct | Cushion | D | VVS1 | Ideal
From $8,445
Compare at $25,460
Save 73.9%GIA | 4ct | Cushion | H | SI1 | Ideal
From $3,040
Compare at $11,640
Save 72.9%GIA | 4ct | Cushion | E | IF | Excellent
From $9,345
Compare at $34,530
Save 74.4%GIA | 4ct | Cushion | D | VVS1 | Excellent
From $7,510
Compare at $29,310
GIA | 4ct | Cushion | D | FL | Ideal
From $30,750
Compare at $34,128
Save 69.5%GIA | 4ct | Cushion | D | FL | Excellent
From $30,270
Compare at $99,380
Save 73.1%GIA | 4ct | Cushion | D | VVS1 | Excellent
From $5,993
Compare at $22,290
Save 59.9%GIA | 4ct | Cushion | D | VVS1 | Excellent
From $5,993
Compare at $14,939
Save 58.9%GIA | 4ct | Cushion | E | VVS1 | Excellent
From $4,979
Compare at $12,128
Save 71.7%GIA | 4ct | Cushion | D | IF | Ideal
From $16,100
Compare at $56,800
Save 58.9%GIA | 4ct | Cushion | E | VVS1 | Very Good
From $4,979
Compare at $12,128
Save 59.9%GIA | 4ct | Cushion | D | VVS1 | Excellent
From $5,993
Compare at $14,939
Save 65.1%IGI | 4ct | Cushion | G | VS1 | Ideal
From $1,373
Compare at $3,940
IGI | 4ct | Cushion | H | VS1 | Very Good
From $2,177
Compare at $2,180
Save 55.4%IGI | 4ct | Cushion | H | VVS2 | Ideal
From $3,345
Compare at $7,500
Save 79.9%IGI | 4ct | Cushion | G | VS1 | Ideal
From $1,238
Compare at $6,170
Save 66.3%IGI | 4ct | Cushion | G | VS2 | Ideal
From $1,232
Compare at $3,650
Save 84.8%IGI | 4ct | Cushion | F | VVS2 | Very Good
From $1,260
Compare at $8,310
IGI | 4ct | Cushion | H | SI1 | Ideal
From $1,428
Compare at $1,430
Save 70.7%IGI | 4ct | Cushion | G | VS1 | Ideal
From $1,238
Compare at $4,220
Save 69%IGI | 4ct | Cushion | F | SI1 | Excellent
From $1,550
Compare at $5,000
Save 80.4%IGI | 4ct | Cushion | G | VS2 | Ideal
From $1,232
Compare at $6,290
Save 80.4%IGI | 4ct | Cushion | G | VS2 | Ideal
From $1,232
Compare at $6,290
Save 72.1%IGI | 4ct | Cushion | G | VS2 | Ideal
From $1,232
Compare at $4,420
Save 76.2%IGI | 4ct | Cushion | D | VS2 | Excellent
From $1,573
Compare at $6,600
Save 78.6%IGI | 4ct | Cushion | G | VVS2 | Ideal
From $1,748
Compare at $8,150
Save 80.4%IGI | 4ct | Cushion | G | VS2 | Ideal
From $1,232
Compare at $6,290
Save 76.2%IGI | 4ct | Cushion | D | VS2 | Excellent
From $1,573
Compare at $6,600
Save 76.2%IGI | 4ct | Cushion | D | VS2 | Excellent
From $1,573
Compare at $6,600
Save 76.2%IGI | 4ct | Cushion | D | VS2 | Excellent
From $1,573
Compare at $6,600
Save 76.1%IGI | 4ct | Cushion | D | VS1 | Excellent
From $1,698
Compare at $7,110
Save 76.1%IGI | 4ct | Cushion | D | VS1 | Excellent
From $1,698
Compare at $7,110
Save 80.4%IGI | 4ct | Cushion | D | VVS2 | Ideal
From $2,193
Compare at $11,200
Save 61%IGI | 4ct | Cushion | E | VS2 | Ideal
From $1,300
Compare at $3,336
Save 73.8%IGI | 4ct | Cushion | F | VVS1 | Excellent
From $2,356
Compare at $8,980
IGI | 4ct | Cushion | K | VS1 | Very Good
From $1,359
Compare at $1,360
IGI | 4ct | Cushion | E | VVS2 | Very Good
From $1,244
Compare at $1,245
Save 74.7%IGI | 4ct | Cushion | D | IF | Ideal
From $10,044
Compare at $39,770
Save 73.1%IGI | 4ct | Cushion | D | VVS1 | Ideal
From $5,739
Compare at $21,310
Save 80.9%IGI | 4ct | Cushion | E | VS2 | Ideal
From $1,446
Compare at $7,580
Save 51.4%IGI | 4ct | Cushion | I | VVS2 | Ideal
From $2,485
Compare at $5,110
Save 75.5%IGI | 4ct | Cushion | G | VS1 | Ideal
From $1,238
Compare at $5,050
Save 63.3%IGI | 4ct | Cushion | D | IF | Very Good
From $10,044
Compare at $27,400
Save 63.3%IGI | 4ct | Cushion | D | IF | Excellent
From $10,044
Compare at $27,400
Save 74.7%IGI | 4ct | Cushion | D | IF | Ideal
From $10,044
Compare at $39,770
Save 73.1%IGI | 4ct | Cushion | D | VVS1 | Ideal
From $5,739
Compare at $21,310
Save 74.3%IGI | 4ct | Cushion | E | VS2 | Ideal
From $1,366
Compare at $5,310
Entry pricing in this category starts around $144.
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 $27,668 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 $2,590 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 2,778 comparable stones in this segment. Prices start around $144 and go up to $27,812.
Based on the latest market data, the average asking price is about $3,794 with a median around $2,590.
The observed spread is roughly $27,668 across tracked listings, which is about 99.5% 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 $2,590, 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 $27,668 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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