4.9 Carat Cushion Lab Grown Diamond Prices Comparison
As of April 2026, 4.9 carat cushion lab grown diamonds usually range from $650 to $29,356, with an average price of $4,161.In the last month, prices for these diamonds are up 0.1%.Compare 36 verified listings across 6 retailers tracked by CaratRadar.
4.9 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 36 verified 4.9-carat cushion lab grown diamonds listed across 6 online retailers. Prices in this segment range from $650 to $29,356, with an average asking price of $4,161 and a median of $2,851.
The price spread of $28,706 (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.
36 diamonds tracked in this segment
Price range: $650 to $29,356
Average price: $4,161
Median price: $2,851
Available across 6 retailers
Savings potential: up to 97.8%
Price Range Overview
As of Apr 14, 2026Real market range for this carat, shape, and diamond type.
36
$650
$4,161
$2,851
$29,356
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 72.4%IGI | 4.91ct | Cushion | E | VVS2 | Ideal
From $3,569
Compare at $12,920
Save 74%IGI | 4.91ct | Cushion | D | VVS1 | Ideal
From $7,508
Compare at $28,860
Save 77.1%IGI | 4.91ct | Cushion | E | VVS2 | Ideal
From $2,124
Compare at $9,290
Save 74.7%IGI | 4.91ct | Cushion | F | VVS2 | Very Good
From $1,457
Compare at $5,760
Save 41.8%IGI | 4.91ct | Cushion | E | VS1 | Very Good
From $1,720
Compare at $2,955
Save 74.7%IGI | 4.91ct | Cushion | F | VVS2 | Excellent
From $1,442
Compare at $5,700
Save 74.7%IGI | 4.91ct | Cushion | F | VVS2 | Excellent
From $1,457
Compare at $5,760
Save 76.1%IGI | 4.91ct | Cushion | E | VVS2 | Excellent
From $1,450
Compare at $6,060
Save 76.1%IGI | 4.91ct | Cushion | E | VVS2 | Ideal
From $1,763
Compare at $7,380
Save 74.7%IGI | 4.91ct | Cushion | F | VVS2 | Excellent
From $1,457
Compare at $5,760
Save 28.7%IGI | 4.91ct | Cushion | FANCY | VS2 | Very Good
From $3,469
Compare at $4,863
Save 70.6%GIA | 4.92ct | Cushion | E | VVS2 | Ideal
From $8,216
Compare at $27,930
Save 25.3%GIA | 4.92ct | Cushion | E | VVS2 | Excellent
From $5,146
Compare at $6,890
Save 85.1%IGI | 4.92ct | Cushion | E | VS2 | Ideal
From $1,415
Compare at $9,490
Save 71.2%IGI | 4.92ct | Cushion | F | VS1 | Excellent
From $2,854
Compare at $9,920
Save 69.4%IGI | 4.92ct | Cushion | F | VS1 | Very Good
From $1,776
Compare at $5,810
Save 74.7%IGI | 4.93ct | Cushion | G | VVS2 | Very Good
From $1,418
Compare at $5,600
Save 28.2%IGI | 4.93ct | Cushion | E | VVS2 | Very Good
From $1,357
Compare at $1,889
Save 80.9%IGI | 4.93ct | Cushion | E | VS1 | Very Good
From $2,296
Compare at $12,020
Save 77.1%IGI | 4.94ct | Cushion | E | VVS2 | Ideal
From $2,368
Compare at $10,360
Save 65.6%IGI | 4.94ct | Cushion | F | VVS2 | Excellent
From $2,304
Compare at $6,700
Save 29.8%IGI | 4.94ct | Cushion | E | VS1 | Very Good
From $1,299
Compare at $1,850
Save 65.5%GIA | 4.95ct | Cushion | E | IF | Very Good
From $16,275
Compare at $47,176
Save 77.1%IGI | 4.95ct | Cushion | E | VS1 | Ideal
From $2,253
Compare at $9,840
Save 54.2%IGI | 4.95ct | Cushion | E | VVS2 | Ideal
From $3,168
Compare at $6,910
Save 77.9%IGI | 4.95ct | Cushion | F | VVS2 | Very Good
From $1,378
Compare at $6,240
Save 67.7%IGI | 4.95ct | Cushion | E | VS1 | Ideal
From $2,410
Compare at $7,460
Save 66%GIA | 4.96ct | Cushion | D | VVS2 | Excellent
From $4,795
Compare at $14,090
Save 76.6%IGI | 4.96ct | Cushion | F | VS1 | Ideal
From $1,605
Compare at $6,850
Save 75.9%IGI | 4.96ct | Cushion | E | VVS2 | Very Good
From $1,461
Compare at $6,060
Save 20.7%GIA | 4.98ct | Cushion | D | FL | Ideal
From $42,720
Compare at $53,858
Save 69.8%IGI | 4.98ct | Cushion | E | VS1 | Ideal
From $1,294
Compare at $4,280
IGI | 4.98ct | Cushion | E | VVS2 | Ideal
From $1,848
Compare at $1,850
Save 77.2%IGI | 4.98ct | Cushion | D | VS1 | Ideal
From $2,441
Compare at $10,720
Save 77.6%IGI | 4.99ct | Cushion | E | VVS2 | Ideal
From $1,793
Compare at $7,990
IGI | 4.99ct | Cushion | E | VS1 | Very Good
From $1,466
Compare at $6,980
Entry pricing in this category starts around $650.
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 $28,706 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 $2,851 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 36 comparable stones in this segment. Prices start around $650 and go up to $29,356.
Based on the latest market data, the average asking price is about $4,161 with a median around $2,851.
The observed spread is roughly $28,706 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 $2,851, 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 6 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 $28,706 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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