4.9 Carat Cushion Lab Grown Diamond Prices Comparison
As of February 2026, 4.9 carat cushion lab grown diamonds usually range from $1,051 to $17,846, with an average price of $3,343.In the last month, prices for these diamonds are down 0.8%.Compare 60 verified listings across 8 retailers tracked by CaratRadar.
4.9 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 60 verified 4.9-carat cushion lab grown diamonds listed across 8 online retailers. Prices in this segment range from $1,051 to $17,846, with an average asking price of $3,343 and a median of $1,861.
The price spread of $16,795 (94.1% 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.
60 diamonds tracked in this segment
Price range: $1,051 to $17,846
Average price: $3,343
Median price: $1,861
Available across 8 retailers
Savings potential: up to 94.1%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
60
$1,051
$3,343
$1,861
$17,846
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 78.9%4.85ct | Cushion | D | VS2 | Ideal
From $1,930
Compare at $9,130
IGISave 80.7%4.85ct | Cushion | D | VVS2 | Very Good
From $1,948
Compare at $10,090
IGISave 86%4.85ct | Cushion | F | VVS2 | Ideal
From $1,551
Compare at $11,050
IGISave 79.3%4.85ct | Cushion | E | VS2 | Excellent
From $1,196
Compare at $5,770
IGISave 63.6%4.85ct | Cushion | E | VVS2 | Excellent
From $1,157
Compare at $3,178
IGISave 63.2%4.86ct | Cushion | F | VVS2 | Excellent
From $1,051
Compare at $2,859
IGISave 82.1%4.86ct | Cushion | F | VVS2 | Very Good
From $1,168
Compare at $6,520
IGISave 53.6%4.86ct | Cushion | D | VS1 | Very Good
From $1,589
Compare at $3,421
IGISave 81.6%4.87ct | Cushion | E | VVS1 | Ideal
From $2,478
Compare at $13,500
IGISave 84.4%4.87ct | Cushion | D | VVS2 | Ideal
From $2,162
Compare at $13,900
IGISave 52.8%4.87ct | Cushion | F | VS1 | Very Good
From $1,547
Compare at $3,275
IGISave 84.6%4.87ct | Cushion | F | VVS2 | Ideal
From $1,283
Compare at $8,330
IGISave 71.5%4.87ct | Cushion | E | VS1 | Ideal
From $2,500
Compare at $8,760
IGISave 65.8%4.87ct | Cushion | D | IF | Very Good
From $17,846
Compare at $52,145
IGISave 72.3%4.87ct | Cushion | D | IF | Excellent
From $12,967
Compare at $46,765
GIASave 82.1%4.87ct | Cushion | E | IF | Very Good
From $10,770
Compare at $60,227
GIASave 68.8%4.88ct | Cushion | D | VVS1 | Very Good
From $6,764
Compare at $21,713
IGISave 85.8%4.88ct | Cushion | E | VS1 | Excellent
From $1,543
Compare at $10,840
IGISave 81.5%4.88ct | Cushion | E | VVS2 | Ideal
From $2,376
Compare at $12,840
IGISave 86.4%4.88ct | Cushion | D | VVS2 | Very Good
From $1,875
Compare at $13,820
IGISave 64%4.88ct | Cushion | E | VS2 | Excellent
From $3,372
Compare at $9,360
IGISave 80.8%4.88ct | Cushion | E | VS1 | Very Good
From $1,764
Compare at $9,190
IGISave 77%4.88ct | Cushion | F | VVS2 | Ideal
From $2,030
Compare at $8,810
IGISave 79.8%4.88ct | Cushion | E | VVS2 | Ideal
From $2,376
Compare at $11,740
IGISave 68.1%4.88ct | Cushion | FANCY | SI1 | Excellent
From $2,719
Compare at $8,534
IGISave 61.9%4.89ct | Cushion | E | VS1 | Very Good
From $1,401
Compare at $3,674
IGISave 75.2%4.9ct | Cushion | D | IF | Excellent
From $11,788
Compare at $47,469
IGISave 57.8%4.9ct | Cushion | F | VS1 | Very Good
From $1,439
Compare at $3,414
GIASave 68.1%4.9ct | Cushion | D | VVS1 | Excellent
From $8,193
Compare at $25,685
IGISave 55.3%4.9ct | Cushion | F | VVS2 | Very Good
From $1,244
Compare at $2,784
IGISave 82.7%4.9ct | Cushion | F | VVS2 | Ideal
From $1,848
Compare at $10,690
IGISave 55.9%4.9ct | Cushion | F | VVS2 | Excellent
From $1,259
Compare at $2,857
IGISave 55.3%4.9ct | Cushion | F | VS1 | Very Good
From $1,274
Compare at $2,850
IGISave 26.8%4.9ct | Cushion | FANCY | SI2 | Good
From $3,107
Compare at $4,242
IGISave 81.5%4.91ct | Cushion | E | VVS2 | Ideal
From $2,389
Compare at $12,920
IGISave 55.7%4.91ct | Cushion | E | VVS2 | Excellent
From $1,412
Compare at $3,184
IGISave 89.6%4.91ct | Cushion | F | VVS2 | Excellent
From $1,109
Compare at $10,620
IGISave 82.9%4.91ct | Cushion | D | VVS1 | Ideal
From $4,942
Compare at $28,860
IGISave 81.5%4.91ct | Cushion | E | VVS2 | Excellent
From $2,389
Compare at $12,920
IGISave 18.7%4.91ct | Cushion | F | VVS2 | Very Good
From $1,267
Compare at $1,560
IGISave 78.1%4.91ct | Cushion | E | VVS2 | Ideal
From $1,603
Compare at $7,320
IGISave 83%4.91ct | Cushion | E | VVS2 | Ideal
From $1,568
Compare at $9,200
IGISave 52.1%4.91ct | Cushion | F | VVS2 | Very Good
From $1,882
Compare at $3,928
IGISave 61.1%4.91ct | Cushion | E | VS1 | Very Good
From $1,436
Compare at $3,688
IGISave 81.9%4.92ct | Cushion | G | SI1 | Very Good
From $1,249
Compare at $6,900
IGISave 61.2%4.92ct | Cushion | E | VVS2 | Very Good
From $1,458
Compare at $3,756
IGISave 63.9%4.92ct | Cushion | E | VS1 | Excellent
From $1,141
Compare at $3,158
IGISave 84.7%4.92ct | Cushion | E | VS2 | Ideal
From $1,445
Compare at $9,440
GIASave 66.4%4.92ct | Cushion | E | VVS2 | Excellent
From $5,146
Compare at $15,310
IGISave 84.2%4.92ct | Cushion | FANCY | VS1 | Very Good
From $1,593
Compare at $10,082
Entry pricing in this category starts around $1,051.
What to Know When Shopping for 4.9 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $16,795 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 $1,861 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 60 comparable stones in this segment. Prices start around $1,051 and go up to $17,846.
Based on the latest market data, the average asking price is about $3,343 with a median around $1,861.
The observed spread is roughly $16,795 across tracked listings, which is about 94.1% 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 $1,861, 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 $16,795 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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