4.5 Carat Cushion Lab Grown Diamond Prices Comparison
As of February 2026, 4.5 carat cushion lab grown diamonds usually range from $933 to $39,400, with an average price of $3,112.In the last month, prices for these diamonds are down 2.1%.Compare 352 verified listings across 11 retailers tracked by CaratRadar.
4.5 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 352 verified 4.5-carat cushion lab grown diamonds listed across 11 online retailers. Prices in this segment range from $933 to $39,400, with an average asking price of $3,112 and a median of $1,844.
The price spread of $38,467 (97.6% 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.
352 diamonds tracked in this segment
Price range: $933 to $39,400
Average price: $3,112
Median price: $1,844
Available across 11 retailers
Savings potential: up to 97.6%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
352
$933
$3,112
$1,844
$39,400
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 75.7%4.46ct | Cushion | E | VVS2 | Ideal
From $2,589
Compare at $10,670
GIASave 45.3%4.46ct | Cushion | E | VVS1 | Excellent
From $12,370
Compare at $22,620
IGISave 75.3%4.46ct | Cushion | D | IF | Very Good
From $12,425
Compare at $50,210
IGISave 19%4.46ct | Cushion | E | VVS2 | Very Good
From $1,740
Compare at $2,147
IGISave 34.7%4.46ct | Cushion | E | VVS2 | Very Good
From $2,075
Compare at $3,178
IGISave 34.7%4.46ct | Cushion | E | VVS2 | Very Good
From $2,075
Compare at $3,178
IGISave 78.2%4.47ct | Cushion | F | VS1 | Excellent
From $1,998
Compare at $9,170
IGISave 86.8%4.47ct | Cushion | F | VVS2 | Very Good
From $1,252
Compare at $9,490
IGISave 32.3%4.47ct | Cushion | D | VVS1 | Very Good
From $3,635
Compare at $5,366
IGISave 64.7%4.47ct | Cushion | H | VS1 | Very Good
From $2,235
Compare at $6,330
IGISave 73.3%4.47ct | Cushion | E | VVS1 | Ideal
From $3,315
Compare at $12,400
GIASave 81.6%4.47ct | Cushion | F | VS1 | Excellent
From $2,546
Compare at $13,840
IGISave 81.6%4.48ct | Cushion | E | VVS1 | Ideal
From $3,401
Compare at $18,440
IGISave 71.6%4.48ct | Cushion | E | VS1 | Ideal
From $1,095
Compare at $3,850
IGISave 75.3%4.48ct | Cushion | D | IF | Very Good
From $12,481
Compare at $50,435
GIASave 37.2%4.48ct | Cushion | F | SI1 | Ideal
From $4,462
Compare at $7,100
IGISave 67.1%4.48ct | Cushion | F | VS1 | Very Good
From $1,797
Compare at $5,460
IGISave 65.4%4.48ct | Cushion | D | IF | Good
From $12,480
Compare at $36,025
IGISave 87.4%4.48ct | Cushion | D | VS1 | Very Good
From $1,356
Compare at $10,790
GIASave 82.3%4.48ct | Cushion | D | VVS1 | Excellent
From $5,034
Compare at $28,400
GIASave 67.2%4.48ct | Cushion | E | VVS2 | Excellent
From $3,751
Compare at $11,440
GIASave 80.6%4.48ct | Cushion | D | IF | Excellent
From $11,227
Compare at $57,920
IGISave 85.4%4.49ct | Cushion | F | VVS2 | Very Good
From $1,389
Compare at $9,540
IGISave 85.7%4.49ct | Cushion | F | VS2 | Ideal
From $1,296
Compare at $9,060
IGISave 86.2%4.49ct | Cushion | E | VVS2 | Excellent
From $1,481
Compare at $10,740
IGISave 75.3%4.49ct | Cushion | D | IF | Ideal
From $12,508
Compare at $50,548
GIASave 69.9%4.49ct | Cushion | E | VVS2 | Excellent
From $3,457
Compare at $11,490
GIASave 74.1%4.49ct | Cushion | D | VVS1 | Good
From $7,332
Compare at $28,330
IGISave 82.6%4.49ct | Cushion | D | VS1 | Excellent
From $2,195
Compare at $12,650
IGISave 62.7%4.49ct | Cushion | D | IF | Ideal
From $8,689
Compare at $23,320
IGISave 86.8%4.49ct | Cushion | G | VS1 | Ideal
From $1,005
Compare at $7,620
IGISave 74.8%4.49ct | Cushion | D | VVS1 | Ideal
From $3,664
Compare at $14,520
IGISave 88.1%4.49ct | Cushion | G | VS1 | Very Good
From $1,123
Compare at $9,420
GIASave 67.2%4.49ct | Cushion | D | VVS1 | Excellent
From $5,785
Compare at $17,625
IGISave 76.9%4.5ct | Cushion | G | VS1 | Very Good
From $2,253
Compare at $9,740
GIASave 82.1%4.5ct | Cushion | E | VVS1 | Good
From $3,917
Compare at $21,860
IGISave 86.6%4.5ct | Cushion | G | VS1 | Ideal
From $1,155
Compare at $8,650
IGISave 48%4.5ct | Cushion | FANCY | VS1 | Very Good
From $1,235
Compare at $2,377
IGISave 65%4.5ct | Cushion | D | IF | Excellent
From $13,591
Compare at $38,867
IGISave 79.8%4.5ct | Cushion | F | VS2 | Excellent
From $974
Compare at $4,810
IGISave 76.9%4.5ct | Cushion | G | VVS2 | Very Good
From $2,265
Compare at $9,790
IGISave 81.4%4.5ct | Cushion | F | VVS2 | Very Good
From $1,819
Compare at $9,790
IGISave 77.1%4.5ct | Cushion | F | VS1 | Very Good
From $1,834
Compare at $8,000
GCALSave 70.9%4.5ct | Cushion | E | VVS2 | Ideal
From $2,542
Compare at $8,750
IGISave 53.3%4.5ct | Cushion | G | VS2 | Very Good
From $19,390
Compare at $41,551
IGISave 82.8%4.5ct | Cushion | D | VVS2 | Excellent
From $2,454
Compare at $14,300
IGISave 82%4.5ct | Cushion | E | VVS2 | Very Good
From $3,464
Compare at $19,210
IGISave 80.1%4.5ct | Cushion | D | VVS1 | Ideal
From $2,920
Compare at $14,650
IGISave 78.7%4.5ct | Cushion | F | VVS2 | Ideal
From $1,859
Compare at $8,740
IGISave 46%4.5ct | Cushion | FANCY | VS2 | Very Good
From $2,051
Compare at $3,800
Entry pricing in this category starts around $933.
What to Know When Shopping for 4.5 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $38,467 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 $1,844 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 352 comparable stones in this segment. Prices start around $933 and go up to $39,400.
Based on the latest market data, the average asking price is about $3,112 with a median around $1,844.
The observed spread is roughly $38,467 across tracked listings, which is about 97.6% 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 $1,844, 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 11 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 $38,467 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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