5.1 Carat Cushion Lab Grown Diamond Prices Comparison
As of May 2026, 5.1 carat cushion lab grown diamonds usually range from $585 to $30,843, with an average price of $4,013.In the last month, prices for these diamonds are down 3.9%.Compare 235 verified listings across 7 retailers tracked by CaratRadar.
5.1 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 235 verified 5.1-carat cushion lab grown diamonds listed across 7 online retailers. Prices in this segment range from $585 to $30,843, with an average asking price of $4,013 and a median of $2,722.
The price spread of $30,258 (98.1% 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.
235 diamonds tracked in this segment
Price range: $585 to $30,843
Average price: $4,013
Median price: $2,722
Available across 7 retailers
Savings potential: up to 98.1%
Price Range Overview
As of May 29, 2026Real market range for this carat, shape, and diamond type.
235
$585
$4,013
$2,722
$30,843
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 67.9%IGI | 5.1ct | Cushion | G | VS1 | Very Good
From $744
Compare at $2,318
Save 65.1%IGI | 5.1ct | Cushion | F | SI1 | Very Good
From $790
Compare at $2,265
Save 65.1%IGI | 5.11ct | Cushion | F | SI1 | Very Good
From $799
Compare at $2,287
Save 61.4%IGI | 5.1ct | Cushion | G | VS1 | Ideal
From $911
Compare at $2,359
Save 61.4%IGI | 5.1ct | Cushion | G | VS1 | Ideal
From $911
Compare at $2,359
Save 64.3%IGI | 5.1ct | Cushion | E | VS1 | Very Good
From $928
Compare at $2,600
Save 62.6%IGI | 5.1ct | Cushion | F | VVS2 | Good
From $969
Compare at $2,591
Save 60.3%IGI | 5.18ct | Cushion | G | VVS2 | Very Good
From $1,034
Compare at $2,605
Save 33.4%IGI | 5.1ct | Cushion | F | VS1 | Excellent
From $1,038
Compare at $1,559
Save 58.3%IGI | 5.17ct | Cushion | F | VS1 | Very Good
From $1,043
Compare at $2,499
IGI | 5.13ct | Cushion | G | VS2 | Very Good
From $1,089
Compare at $1,145
Save 54.7%IGI | 5.1ct | Cushion | F | VS2 | Ideal
From $1,091
Compare at $2,410
Save 78.1%IGI | 5.14ct | Cushion | H | VS1 | Excellent
From $1,096
Compare at $5,010
Save 72.8%IGI | 5.1ct | Cushion | E | VVS2 | Very Good
From $1,102
Compare at $4,056
Save 59.3%IGI | 5.13ct | Cushion | E | VVS2 | Very Good
From $1,129
Compare at $2,773
Save 30.8%IGI | 5.1ct | Cushion | E | VS1 | Ideal
From $1,153
Compare at $1,665
IGI | 5.15ct | Cushion | G | VVS2 | Very Good
From $1,153
Compare at $1,173
Save 59%IGI | 5.19ct | Cushion | E | VVS2 | Very Good
From $1,164
Compare at $2,840
Save 57.1%IGI | 5.1ct | Cushion | E | VS1 | Very Good
From $1,164
Compare at $2,711
Save 70.4%IGI | 5.1ct | Cushion | E | VVS2 | Ideal
From $1,200
Compare at $4,056
Save 73.1%IGI | 5.11ct | Cushion | FANCY | SI1 | Very Good
From $1,212
Compare at $4,501
Save 53.8%IGI | 5.1ct | Cushion | F | VVS2 | Ideal
From $1,220
Compare at $2,643
Save 76.4%IGI | 5.1ct | Cushion | F | VS2 | Ideal
From $1,227
Compare at $5,190
Save 79.3%IGI | 5.11ct | Cushion | G | VVS2 | Ideal
From $1,232
Compare at $5,960
Save 52.2%IGI | 5.15ct | Cushion | G | VVS2 | Very Good
From $1,233
Compare at $2,579
Save 54.7%IGI | 5.2ct | Cushion | F | VVS2 | Ideal
From $1,243
Compare at $2,741
Save 55.2%IGI | 5.2ct | Cushion | E | VS1 | Very Good
From $1,245
Compare at $2,777
Save 56%IGI | 5.13ct | Cushion | E | VVS2 | Ideal
From $1,247
Compare at $2,833
Save 26.7%IGI | 5.1ct | Cushion | E | VS1 | Very Good
From $1,254
Compare at $1,711
IGI | 5.11ct | Cushion | E | VS1 | Very Good
From $1,256
Compare at $1,283
Save 79.7%IGI | 5.1ct | Cushion | G | VVS2 | Ideal
From $1,264
Compare at $6,230
Save 79.3%IGI | 5.11ct | Cushion | G | VVS2 | Ideal
From $1,270
Compare at $6,130
Save 55.6%IGI | 5.17ct | Cushion | E | VVS2 | Ideal
From $1,280
Compare at $2,881
Save 78.9%IGI | 5.1ct | Cushion | G | VVS2 | Ideal
From $1,289
Compare at $6,110
Save 78.9%IGI | 5.1ct | Cushion | G | VVS2 | Ideal
From $1,289
Compare at $6,110
Save 45.3%IGI | 5.1ct | Cushion | G | VS1 | Very Good
From $1,294
Compare at $2,364
Save 53.5%IGI | 5.1ct | Cushion | E | VVS2 | Excellent
From $1,295
Compare at $2,785
Save 53.5%IGI | 5.1ct | Cushion | E | VVS2 | Excellent
From $1,295
Compare at $2,785
Save 52.2%IGI | 5.13ct | Cushion | E | VS1 | Very Good
From $1,301
Compare at $2,723
Save 53.1%IGI | 5.1ct | Cushion | E | VVS2 | Very Good
From $1,306
Compare at $2,786
Save 53.1%IGI | 5.1ct | Cushion | E | VVS2 | Excellent
From $1,306
Compare at $2,786
Save 53.9%IGI | 5.16ct | Cushion | E | VVS2 | Very Good
From $1,308
Compare at $2,839
Save 37.4%IGI | 5.11ct | Cushion | F | VVS2 | Ideal
From $1,325
Compare at $2,117
Save 25.8%IGI | 5.1ct | Cushion | E | VVS2 | Very Good
From $1,326
Compare at $1,787
Save 25.8%IGI | 5.1ct | Cushion | E | VVS2 | Very Good
From $1,326
Compare at $1,787
Save 57.5%IGI | 5.1ct | Cushion | D | VS1 | Ideal
From $1,329
Compare at $3,127
Save 57.5%IGI | 5.1ct | Cushion | D | VS1 | Ideal
From $1,329
Compare at $3,127
Save 57.5%IGI | 5.1ct | Cushion | D | VS1 | Ideal
From $1,329
Compare at $3,127
Save 57.5%IGI | 5.1ct | Cushion | D | VS1 | Very Good
From $1,329
Compare at $3,127
Save 51.2%IGI | 5.1ct | Cushion | E | VS1 | Very Good
From $1,331
Compare at $2,729
Entry pricing in this category starts around $585.
What to Know When Shopping for 5.1 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $30,258 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 $2,722 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 235 comparable stones in this segment. Prices start around $585 and go up to $30,843.
Based on the latest market data, the average asking price is about $4,013 with a median around $2,722.
The observed spread is roughly $30,258 across tracked listings, which is about 98.1% 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 $4,013. The median price is $2,722, 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 7 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 $30,258 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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