5.5 Carat Cushion Lab Grown Diamond Prices Comparison
As of May 2026, 5.5 carat cushion lab grown diamonds usually range from $789 to $30,469, with an average price of $4,712.In the last month, prices for these diamonds are down 8%.Compare 128 verified listings across 6 retailers tracked by CaratRadar.
5.5 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 128 verified 5.5-carat cushion lab grown diamonds listed across 6 online retailers. Prices in this segment range from $789 to $30,469, with an average asking price of $4,712 and a median of $3,270.
The price spread of $29,680 (97.4% 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.
128 diamonds tracked in this segment
Price range: $789 to $30,469
Average price: $4,712
Median price: $3,270
Available across 6 retailers
Savings potential: up to 97.4%
Price Range Overview
As of May 29, 2026Real market range for this carat, shape, and diamond type.
128
$789
$4,712
$3,271
$30,469
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%IGI | 5.59ct | Cushion | I | VS1 | Ideal
From $849
Compare at $3,860
Save 61.1%IGI | 5.51ct | Cushion | G | VS1 | Ideal
From $984
Compare at $2,528
Save 61.1%IGI | 5.51ct | Cushion | G | VS1 | Ideal
From $984
Compare at $2,528
Save 72%IGI | 5.55ct | Cushion | E | VS2 | Very Good
From $1,047
Compare at $3,737
Save 71.6%IGI | 5.52ct | Cushion | E | VS2 | Very Good
From $1,051
Compare at $3,701
Save 72.1%IGI | 5.52ct | Cushion | F | VS1 | Very Good
From $1,053
Compare at $3,770
Save 66.2%IGI | 5.53ct | Cushion | F | VS2 | Ideal
From $1,065
Compare at $3,148
Save 63.3%IGI | 5.51ct | Cushion | F | VS1 | Ideal
From $1,082
Compare at $2,946
Save 65.5%IGI | 5.57ct | Cushion | E | VS1 | Very Good
From $1,094
Compare at $3,167
Save 64.3%IGI | 5.59ct | Cushion | F | VS1 | Ideal
From $1,095
Compare at $3,070
Save 70.3%IGI | 5.53ct | Cushion | E | VS2 | Very Good
From $1,103
Compare at $3,713
Save 57%IGI | 5.5ct | Cushion | G | VS1 | Ideal
From $1,112
Compare at $2,584
Save 61.5%IGI | 5.52ct | Cushion | F | VS1 | Very Good
From $1,142
Compare at $2,969
Save 63.1%IGI | 5.52ct | Cushion | E | VS1 | Ideal
From $1,154
Compare at $3,127
Save 63%IGI | 5.55ct | Cushion | F | VVS2 | Very Good
From $1,172
Compare at $3,165
Save 73.9%IGI | 5.59ct | Cushion | E | VS1 | Ideal
From $1,180
Compare at $4,525
Save 79%IGI | 5.5ct | Cushion | F | VS2 | Ideal
From $1,183
Compare at $5,630
Save 72.9%IGI | 5.51ct | Cushion | E | VS1 | Ideal
From $1,189
Compare at $4,382
Save 62.1%IGI | 5.52ct | Cushion | E | VS1 | Very Good
From $1,189
Compare at $3,136
Save 65.6%IGI | 5.51ct | Cushion | E | VVS2 | Ideal
From $1,199
Compare at $3,485
Save 60.7%IGI | 5.5ct | Cushion | F | VVS2 | Very Good
From $1,240
Compare at $3,156
Save 57.8%IGI | 5.51ct | Cushion | F | VS1 | Ideal
From $1,257
Compare at $2,976
Save 57.8%IGI | 5.51ct | Cushion | F | VS1 | Ideal
From $1,257
Compare at $2,976
Save 57.8%IGI | 5.51ct | Cushion | F | VS1 | Ideal
From $1,257
Compare at $2,976
Save 57.8%IGI | 5.52ct | Cushion | F | VS1 | Ideal
From $1,260
Compare at $2,986
Save 64.9%IGI | 5.57ct | Cushion | E | VVS2 | Very Good
From $1,260
Compare at $3,587
Save 65.1%IGI | 5.59ct | Cushion | E | VVS2 | Excellent
From $1,261
Compare at $3,611
Save 64%IGI | 5.53ct | Cushion | E | VVS2 | Very Good
From $1,279
Compare at $3,556
Save 32.9%IGI | 5.54ct | Cushion | F | VVS2 | Very Good
From $1,280
Compare at $1,907
Save 70.9%IGI | 5.53ct | Cushion | E | VS1 | Very Good
From $1,280
Compare at $4,398
Save 63.6%IGI | 5.55ct | Cushion | E | VVS2 | Very Good
From $1,285
Compare at $3,535
Save 63.2%IGI | 5.51ct | Cushion | E | VVS2 | Ideal
From $1,289
Compare at $3,504
Save 59.8%IGI | 5.57ct | Cushion | F | VVS2 | Very Good
From $1,300
Compare at $3,230
Save 59.4%IGI | 5.56ct | Cushion | F | VVS2 | Excellent
From $1,302
Compare at $3,206
Save 56.1%IGI | 5.5ct | Cushion | F | VS1 | Ideal
From $1,303
Compare at $2,967
Save 70.4%IGI | 5.56ct | Cushion | E | VS1 | Ideal
From $1,308
Compare at $4,422
Save 56.2%IGI | 5.52ct | Cushion | F | VS1 | Ideal
From $1,308
Compare at $2,987
Save 58.2%IGI | 5.5ct | Cushion | E | VS1 | Very Good
From $1,315
Compare at $3,146
Save 58.6%IGI | 5.56ct | Cushion | F | VS2 | Very Good
From $1,319
Compare at $3,189
Save 58.5%IGI | 5.58ct | Cushion | F | VVS2 | Very Good
From $1,342
Compare at $3,237
Save 75.1%IGI | 5.5ct | Cushion | D | VS1 | Ideal
From $1,343
Compare at $5,390
Save 53.8%IGI | 5.5ct | Cushion | F | VS1 | Very Good
From $1,350
Compare at $2,924
Save 62.7%IGI | 5.58ct | Cushion | E | VVS2 | Ideal
From $1,353
Compare at $3,627
Save 27.6%IGI | 5.59ct | Cushion | F | VS2 | Very Good
From $1,354
Compare at $1,871
Save 56.8%IGI | 5.52ct | Cushion | E | VS1 | Ideal
From $1,374
Compare at $3,181
Save 54.6%IGI | 5.59ct | Cushion | F | VS1 | Very Good
From $1,378
Compare at $3,035
Save 56.7%IGI | 5.53ct | Cushion | E | VS1 | Ideal
From $1,383
Compare at $3,193
Save 56.7%IGI | 5.51ct | Cushion | E | VS1 | Ideal
From $1,385
Compare at $3,201
Save 60.6%IGI | 5.5ct | Cushion | E | VVS2 | Ideal
From $1,386
Compare at $3,516
Save 68.1%IGI | 5.52ct | Cushion | D | VS1 | Ideal
From $1,391
Compare at $4,361
Entry pricing in this category starts around $789.
What to Know When Shopping for 5.5 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $29,680 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 $3,270 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 128 comparable stones in this segment. Prices start around $789 and go up to $30,469.
Based on the latest market data, the average asking price is about $4,712 with a median around $3,270.
The observed spread is roughly $29,680 across tracked listings, which is about 97.4% from highest to lowest offer in this bucket.
We refresh pricing data daily so these pages stay current with market changes.
Based on completed market data, the fair market benchmark is $4,712. The median price is $3,270, so offers between the median and fair benchmark can be reasonable, while reputable listings below the median may be especially competitive.
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 $29,680 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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