4.5 Carat Cushion Lab Grown Diamond Prices Comparison
As of April 2026, 4.5 carat cushion lab grown diamonds usually range from $780 to $33,379, with an average price of $4,886.In the last month, prices for these diamonds are down 0.5%.Compare 437 verified listings across 9 retailers tracked by CaratRadar.
4.5 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 437 verified 4.5-carat cushion lab grown diamonds listed across 9 online retailers. Prices in this segment range from $780 to $33,379, with an average asking price of $4,886 and a median of $3,469.
The price spread of $32,599 (97.7% 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.
437 diamonds tracked in this segment
Price range: $780 to $33,379
Average price: $4,886
Median price: $3,469
Available across 9 retailers
Savings potential: up to 97.7%
Price Range Overview
As of Apr 14, 2026Real market range for this carat, shape, and diamond type.
437
$780
$4,886
$3,469
$33,379
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 78.3%GCAL | 4.5ct | Cushion | E | VVS2 | Ideal
From $2,158
Compare at $9,940
Save 74.4%GIA | 4.5ct | Cushion | E | VVS1 | Good
From $5,825
Compare at $22,750
Save 75.4%GIA | 4.5ct | Cushion | D | VVS1 | Good
From $6,975
Compare at $28,360
Save 61.8%GIA | 4.5ct | Cushion | D | VVS1 | Excellent
From $7,645
Compare at $20,023
Save 79.2%IGI | 4.5ct | Cushion | G | VS2 | Ideal
From $1,484
Compare at $7,140
Save 69.1%IGI | 4.5ct | Cushion | G | VS1 | Ideal
From $1,392
Compare at $4,500
Save 81.5%IGI | 4.5ct | Cushion | G | VS2 | Ideal
From $1,323
Compare at $7,140
Save 75.2%IGI | 4.5ct | Cushion | D | VVS2 | Excellent
From $3,496
Compare at $14,080
Save 78.1%IGI | 4.5ct | Cushion | G | VS1 | Ideal
From $1,497
Compare at $6,850
Save 73.3%IGI | 4.5ct | Cushion | E | VVS2 | Very Good
From $5,138
Compare at $19,210
Save 65%IGI | 4.5ct | Cushion | D | IF | Excellent
From $12,672
Compare at $36,186
Save 76.2%IGI | 4.5ct | Cushion | D | VVS1 | Ideal
From $3,490
Compare at $14,650
Save 86.9%IGI | 4.5ct | Cushion | E | VS1 | Ideal
From $1,433
Compare at $10,910
Save 72.6%IGI | 4.5ct | Cushion | D | IF | Very Good
From $11,887
Compare at $43,450
Save 85.6%IGI | 4.5ct | Cushion | D | VVS2 | Excellent
From $1,839
Compare at $12,810
Save 85.8%IGI | 4.5ct | Cushion | F | VVS2 | Excellent
From $1,390
Compare at $9,780
Save 86.4%IGI | 4.5ct | Cushion | E | VVS2 | Excellent
From $1,484
Compare at $10,880
IGI | 4.5ct | Cushion | F | VS2 | Ideal
From $1,321
Compare at $7,810
Save 79.5%IGI | 4.5ct | Cushion | E | VS1 | Ideal
From $2,175
Compare at $10,610
Save 57.9%IGI | 4.5ct | Cushion | FANCY | VVS2 | Very Good
From $3,968
Compare at $9,435
Save 76.3%IGI | 4.5ct | Cushion | F | VVS2 | Ideal
From $2,049
Compare at $8,640
Save 76.3%IGI | 4.5ct | Cushion | F | VS1 | Very Good
From $2,037
Compare at $8,590
Save 76.4%IGI | 4.5ct | Cushion | G | VVS2 | Very Good
From $1,839
Compare at $7,790
Save 58.6%IGI | 4.5ct | Cushion | H | VVS2 | Ideal
From $1,748
Compare at $4,220
Save 72.1%IGI | 4.5ct | Cushion | F | VVS2 | Very Good
From $3,262
Compare at $11,710
IGI | 4.5ct | Cushion | F | VS1 | Very Good
From $1,240
Compare at $1,270
Save 76.4%IGI | 4.5ct | Cushion | G | VVS2 | Very Good
From $1,839
Compare at $7,790
Save 82.5%IGI | 4.5ct | Cushion | D | VVS1 | Very Good
From $4,300
Compare at $24,580
Save 76.3%IGI | 4.5ct | Cushion | F | VVS2 | Ideal
From $2,049
Compare at $8,640
IGI | 4.5ct | Cushion | F | VS1 | Very Good
From $1,346
Compare at $1,350
Save 44.6%IGI | 4.5ct | Cushion | D | VS1 | Ideal
From $1,890
Compare at $3,411
Save 63.4%IGI | 4.5ct | Cushion | D | FL | Ideal
From $19,258
Compare at $52,650
Save 29.8%IGI | 4.5ct | Cushion | E | VS1 | Very Good
From $1,230
Compare at $1,752
Save 29.7%IGI | 4.5ct | Cushion | F | VS2 | Very Good
From $2,484
Compare at $3,533
Save 33%IGI | 4.5ct | Cushion | E | VVS2 | Very Good
From $1,631
Compare at $2,433
Save 62.3%IGI | 4.5ct | Cushion | E | VS1 | Ideal
From $2,385
Compare at $6,320
Save 27%IGI | 4.5ct | Cushion | E | VVS2 | Very Good
From $1,335
Compare at $1,829
Save 68.5%IGI | 4.5ct | Cushion | E | VVS2 | Very Good
From $2,414
Compare at $7,660
Save 85.1%IGI | 4.5ct | Cushion | F | VS1 | Ideal
From $1,364
Compare at $9,130
Save 78.4%GCAL | 4.51ct | Cushion | D | VS2 | Excellent
From $2,116
Compare at $9,810
Save 74.1%GIA | 4.51ct | Cushion | D | VVS1 | Excellent
From $7,662
Compare at $29,550
Save 76.2%GIA | 4.51ct | Cushion | E | VVS2 | Excellent
From $6,800
Compare at $28,620
Save 74.2%GIA | 4.51ct | Cushion | E | VVS2 | Excellent
From $6,753
Compare at $26,180
Save 49.1%GIA | 4.51ct | Cushion | D | VVS1 | Excellent
From $14,530
Compare at $28,540
Save 76.2%GIA | 4.51ct | Cushion | E | VVS2 | Excellent
From $6,742
Compare at $28,380
Save 73.7%IGI | 4.51ct | Cushion | G | VVS2 | Very Good
From $1,339
Compare at $5,090
Save 77%IGI | 4.51ct | Cushion | E | VS2 | Ideal
From $1,949
Compare at $8,460
Save 72.5%IGI | 4.51ct | Cushion | G | VS1 | Ideal
From $1,325
Compare at $4,820
Save 68.4%IGI | 4.51ct | Cushion | E | VS2 | Ideal
From $2,735
Compare at $8,650
Save 75.2%IGI | 4.51ct | Cushion | D | VVS2 | Excellent
From $3,622
Compare at $14,580
Entry pricing in this category starts around $780.
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 $32,599 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 $3,469 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 437 comparable stones in this segment. Prices start around $780 and go up to $33,379.
Based on the latest market data, the average asking price is about $4,886 with a median around $3,469.
The observed spread is roughly $32,599 across tracked listings, which is about 97.7% 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 $3,469, 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 9 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 $32,599 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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