5.1 Carat Cushion Lab Grown Diamond Prices Comparison
As of February 2026, 5.1 carat cushion lab grown diamonds usually range from $996 to $55,820, with an average price of $2,754.In the last month, prices for these diamonds are down 1.9%.Compare 1,894 verified listings across 10 retailers tracked by CaratRadar.
5.1 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 1,894 verified 5.1-carat cushion lab grown diamonds listed across 10 online retailers. Prices in this segment range from $996 to $55,820, with an average asking price of $2,754 and a median of $1,786.
The price spread of $54,824 (98.2% 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.
1,894 diamonds tracked in this segment
Price range: $996 to $55,820
Average price: $2,754
Median price: $1,786
Available across 10 retailers
Savings potential: up to 98.2%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
1,894
$996
$2,754
$1,786
$55,820
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 43.6%5.05ct | Cushion | E | VS1 | Very Good
From $1,866
Compare at $3,310
IGISave 56%5.05ct | Cushion | E | VS1 | Very Good
From $1,499
Compare at $3,407
IGISave 88.6%5.05ct | Cushion | F | VVS2 | Very Good
From $1,276
Compare at $11,210
IGISave 43.4%5.05ct | Cushion | E | VS1 | Very Good
From $2,011
Compare at $3,555
IGISave 54.9%5.05ct | Cushion | F | VVS2 | Very Good
From $1,315
Compare at $2,913
IGISave 45.5%5.05ct | Cushion | E | VVS2 | Very Good
From $2,203
Compare at $4,045
IGISave 82.8%5.05ct | Cushion | D | VS1 | Ideal
From $2,534
Compare at $14,740
IGISave 45.5%5.05ct | Cushion | E | VVS2 | Very Good
From $2,203
Compare at $4,045
IGISave 84%5.05ct | Cushion | F | SI1 | Ideal
From $1,046
Compare at $6,540
IGISave 88.2%5.05ct | Cushion | G | VS1 | Ideal
From $1,266
Compare at $10,720
IGISave 64%5.05ct | Cushion | E | SI1 | Ideal
From $1,815
Compare at $5,040
IGISave 65.3%5.05ct | Cushion | H | VS1 | Very Good
From $2,573
Compare at $7,410
IGISave 82.9%5.05ct | Cushion | D | VVS2 | Ideal
From $4,925
Compare at $28,760
IGISave 64.3%5.05ct | Cushion | F | VVS1 | Ideal
From $4,576
Compare at $12,830
IGISave 82.9%5.05ct | Cushion | D | VVS2 | Ideal
From $4,925
Compare at $28,760
IGISave 54.9%5.05ct | Cushion | E | VVS2 | Ideal
From $1,490
Compare at $3,301
IGISave 54.4%5.05ct | Cushion | E | VVS2 | Ideal
From $1,790
Compare at $3,923
IGISave 88.2%5.05ct | Cushion | F | VVS2 | Ideal
From $1,323
Compare at $11,260
IGISave 84.3%5.05ct | Cushion | E | VVS2 | Ideal
From $1,977
Compare at $12,560
IGISave 75.9%5.05ct | Cushion | E | VS1 | Ideal
From $2,030
Compare at $8,431
IGISave 83.6%5.05ct | Cushion | E | VVS2 | Ideal
From $1,184
Compare at $7,220
IGISave 86.9%5.05ct | Cushion | D | VS2 | Ideal
From $1,642
Compare at $12,550
IGISave 88.5%5.05ct | Cushion | E | VVS2 | Ideal
From $1,255
Compare at $10,930
IGISave 91.4%5.05ct | Cushion | E | VS1 | Ideal
From $1,079
Compare at $12,490
IGISave 84.2%5.05ct | Cushion | E | VVS2 | Ideal
From $1,225
Compare at $7,730
IGISave 86.9%5.05ct | Cushion | E | VS1 | Ideal
From $1,079
Compare at $8,210
IGISave 89.8%5.05ct | Cushion | E | VVS2 | Ideal
From $1,271
Compare at $12,460
IGISave 89.8%5.05ct | Cushion | E | VVS2 | Ideal
From $1,271
Compare at $12,460
IGISave 89.7%5.05ct | Cushion | E | VS1 | Ideal
From $1,282
Compare at $12,490
IGISave 89.8%5.05ct | Cushion | E | VS2 | Ideal
From $1,014
Compare at $9,930
IGISave 55.8%5.05ct | Cushion | F | SI1 | Ideal
From $1,163
Compare at $2,632
IGISave 85.8%5.05ct | Cushion | E | VVS2 | Ideal
From $1,773
Compare at $12,460
IGISave 82.6%5.05ct | Cushion | E | VS1 | Ideal
From $1,117
Compare at $6,410
IGISave 51.1%5.05ct | Cushion | FANCY | VS1 | Good
From $1,770
Compare at $3,620
IGISave 69.5%5.05ct | Cushion | D | VVS1 | Very Good
From $8,721
Compare at $28,547
IGISave 87.1%5.05ct | Cushion | D | VS1 | Ideal
From $1,661
Compare at $12,850
IGISave 54.5%5.05ct | Cushion | D | VS1 | Very Good
From $1,839
Compare at $4,045
IGISave 54.5%5.05ct | Cushion | D | VS1 | Very Good
From $1,839
Compare at $4,045
IGISave 85.8%5.05ct | Cushion | F | VS1 | Ideal
From $1,470
Compare at $10,340
IGISave 50.9%5.05ct | Cushion | D | VVS2 | Ideal
From $1,986
Compare at $4,047
IGISave 86.3%5.05ct | Cushion | E | VS2 | Excellent
From $1,281
Compare at $9,370
IGISave 61.6%5.05ct | Cushion | E | VVS2 | Excellent
From $1,348
Compare at $3,515
IGISave 53.5%5.05ct | Cushion | E | VVS2 | Excellent
From $1,634
Compare at $3,515
IGISave 76.2%5.05ct | Cushion | F | VVS2 | Excellent
From $1,559
Compare at $6,540
IGISave 53.5%5.05ct | Cushion | E | VVS2 | Excellent
From $1,634
Compare at $3,515
IGISave 76.1%5.05ct | Cushion | E | VVS2 | Excellent
From $1,814
Compare at $7,580
IGISave 75.5%5.05ct | Cushion | F | VVS2 | Ideal
From $1,559
Compare at $6,350
IGISave 76.1%5.05ct | Cushion | E | VVS2 | Excellent
From $1,814
Compare at $7,580
IGISave 63.6%5.05ct | Cushion | E | VS1 | Ideal
From $1,155
Compare at $3,171
IGISave 47.4%5.05ct | Cushion | E | VVS1 | Ideal
From $5,316
Compare at $10,115
Entry pricing in this category starts around $996.
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 $54,824 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 $1,786 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 1,894 comparable stones in this segment. Prices start around $996 and go up to $55,820.
Based on the latest market data, the average asking price is about $2,754 with a median around $1,786.
The observed spread is roughly $54,824 across tracked listings, which is about 98.2% 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 $1,786, 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 10 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 $54,824 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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