5.1 Carat Round Lab Grown Diamond Prices Comparison
As of May 2026, 5.1 carat round lab grown diamonds usually range from $565 to $24,557, with an average price of $3,838.In the last month, prices for these diamonds are down 4.1%.Compare 428 verified listings across 10 retailers tracked by CaratRadar.
5.1 Carat Round Lab Grown Diamond Market Overview
CaratRadar currently tracks 428 verified 5.1-carat round lab grown diamonds listed across 10 online retailers. Prices in this segment range from $565 to $24,557, with an average asking price of $3,838 and a median of $2,782.
The price spread of $23,992 (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.
428 diamonds tracked in this segment
Price range: $565 to $24,557
Average price: $3,838
Median price: $2,782
Available across 10 retailers
Savings potential: up to 97.7%
Price Range Overview
As of May 29, 2026Real market range for this carat, shape, and diamond type.
428
$565
$3,838
$2,782
$24,557
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 79.1%IGI | 5.1ct | Round | H | VS2 | Ideal
From $854
Compare at $4,080
Save 71.4%IGI | 5.1ct | Round | F | VVS2 | Excellent
From $1,007
Compare at $3,520
Save 71.8%IGI | 5.1ct | Round | E | VS2 | Very Good
From $1,029
Compare at $3,645
IGI | 5.1ct | Round | E | VVS2 | Ideal
From $1,040
Compare at $4,056
IGI | 5.1ct | Round | E | VVS2 | Ideal
From $1,040
Compare at $4,056
Save 62.7%IGI | 5.13ct | Round | E | VVS2 | Excellent
From $1,050
Compare at $2,815
Save 62.8%IGI | 5.15ct | Round | E | VVS2 | Excellent
From $1,055
Compare at $2,836
Save 73.8%IGI | 5.19ct | Round | E | VS1 | Excellent
From $1,058
Compare at $4,045
Save 73.3%IGI | 5.1ct | Round | E | VS1 | Excellent
From $1,061
Compare at $3,975
Save 71.3%IGI | 5.1ct | Round | E | VS2 | Excellent
From $1,069
Compare at $3,720
Save 73.1%IGI | 5.1ct | Round | E | VVS2 | Excellent
From $1,069
Compare at $3,975
Save 73.3%IGI | 5.17ct | Round | E | VS1 | Excellent
From $1,074
Compare at $4,030
Save 73.4%IGI | 5.2ct | Round | E | VS1 | Excellent
From $1,080
Compare at $4,055
Save 42.6%IGI | 5.1ct | Round | E | VVS2 | Ideal
From $1,093
Compare at $1,904
Save 49%IGI | 5.11ct | Round | F | VS2 | Excellent
From $1,099
Compare at $2,155
Save 61.3%IGI | 5.1ct | Round | F | VVS2 | Ideal
From $1,104
Compare at $2,854
Save 61.3%IGI | 5.1ct | Round | F | VVS2 | Ideal
From $1,104
Compare at $2,854
Save 61.3%IGI | 5.1ct | Round | F | VVS2 | Ideal
From $1,104
Compare at $2,854
Save 61.3%IGI | 5.1ct | Round | F | VVS2 | Excellent
From $1,104
Compare at $2,854
Save 61.3%IGI | 5.1ct | Round | F | VVS2 | Excellent
From $1,104
Compare at $2,854
Save 61.3%IGI | 5.1ct | Round | F | VVS2 | Ideal
From $1,104
Compare at $2,854
Save 61.1%IGI | 5.2ct | Round | F | VS2 | Excellent
From $1,111
Compare at $2,853
Save 59.9%IGI | 5.1ct | Round | F | VVS2 | Ideal
From $1,112
Compare at $2,776
Save 60.6%IGI | 5.1ct | Round | F | VS1 | Ideal
From $1,112
Compare at $2,824
Save 57.3%IGI | 5.16ct | Round | H | VS1 | Ideal
From $1,116
Compare at $2,614
Save 71.9%IGI | 5.1ct | Round | E | VVS2 | Excellent
From $1,119
Compare at $3,975
Save 71.9%IGI | 5.1ct | Round | E | VVS2 | Excellent
From $1,119
Compare at $3,975
Save 71.9%IGI | 5.1ct | Round | E | VVS2 | Ideal
From $1,119
Compare at $3,975
Save 60.8%IGI | 5.1ct | Round | E | VS1 | Ideal
From $1,119
Compare at $2,856
Save 61.3%IGI | 5.19ct | Round | E | VVS2 | Ideal
From $1,120
Compare at $2,891
Save 68.6%IGI | 5.1ct | Round | F | VVS2 | Ideal
From $1,128
Compare at $3,593
Save 59.5%IGI | 5.1ct | Round | E | VVS2 | Excellent
From $1,131
Compare at $2,794
Save 62.5%IGI | 5.1ct | Round | E | VVS2 | Excellent
From $1,136
Compare at $3,029
Save 61.3%IGI | 5.1ct | Round | E | VS1 | Ideal
From $1,140
Compare at $2,945
Save 61.3%IGI | 5.1ct | Round | E | VS1 | Ideal
From $1,140
Compare at $2,945
Save 61.3%IGI | 5.1ct | Round | E | VS1 | Ideal
From $1,140
Compare at $2,945
Save 61.3%IGI | 5.1ct | Round | E | VVS2 | Ideal
From $1,140
Compare at $2,945
Save 61.3%IGI | 5.1ct | Round | E | VVS2 | Ideal
From $1,151
Compare at $2,975
Save 61.3%IGI | 5.1ct | Round | E | VVS2 | Ideal
From $1,151
Compare at $2,975
Save 61.3%IGI | 5.1ct | Round | E | VVS2 | Ideal
From $1,151
Compare at $2,975
Save 61.3%IGI | 5.1ct | Round | E | VVS2 | Ideal
From $1,151
Compare at $2,975
Save 61.3%IGI | 5.1ct | Round | E | VVS2 | Ideal
From $1,151
Compare at $2,975
Save 61.3%IGI | 5.1ct | Round | E | VVS2 | Excellent
From $1,151
Compare at $2,975
Save 61.3%IGI | 5.1ct | Round | E | VVS2 | Excellent
From $1,151
Compare at $2,975
Save 61.3%IGI | 5.1ct | Round | E | VVS2 | Excellent
From $1,151
Compare at $2,975
Save 62.9%IGI | 5.1ct | Round | E | VVS2 | Excellent
From $1,171
Compare at $3,158
Save 66.7%IGI | 5.1ct | Round | G | VVS2 | Ideal
From $1,186
Compare at $3,564
Save 66.7%IGI | 5.1ct | Round | G | VVS2 | Ideal
From $1,186
Compare at $3,564
Save 66.7%IGI | 5.1ct | Round | G | VVS2 | Ideal
From $1,186
Compare at $3,564
Save 66.7%IGI | 5.1ct | Round | F | VS1 | Ideal
From $1,200
Compare at $3,605
Entry pricing in this category starts around $565.
What to Know When Shopping for 5.1 Carat Round Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $23,992 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 $2,782 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.
- Round brilliants command a premium due to higher rough waste during cutting. If budget matters, consider oval or cushion shapes for similar visual size.
Frequently Asked Questions
We currently track 428 comparable stones in this segment. Prices start around $565 and go up to $24,557.
Based on the latest market data, the average asking price is about $3,838 with a median around $2,782.
The observed spread is roughly $23,992 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 completed market data, the fair market benchmark is $3,838. The median price is $2,782, 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 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 $23,992 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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