5.1 Carat Round Lab Grown Diamond Prices Comparison
As of February 2026, 5.1 carat round lab grown diamonds usually range from $1,010 to $51,180, with an average price of $2,023.In the last month, prices for these diamonds are down 3%.Compare 3,984 verified listings across 12 retailers tracked by CaratRadar.
5.1 Carat Round Lab Grown Diamond Market Overview
CaratRadar currently tracks 3,984 verified 5.1-carat round lab grown diamonds listed across 12 online retailers. Prices in this segment range from $1,010 to $51,180, with an average asking price of $2,023 and a median of $1,474.
The price spread of $50,170 (98.0% 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.
3,984 diamonds tracked in this segment
Price range: $1,010 to $51,180
Average price: $2,023
Median price: $1,474
Available across 12 retailers
Savings potential: up to 98.0%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
3,984
$1,010
$2,023
$1,474
$51,180
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 78.2%5.05ct | Round | E | IF | Ideal
From $11,114
Compare at $50,988
IGISave 82.8%5.05ct | Round | D | VVS2 | Ideal
From $4,933
Compare at $28,760
IGISave 86.6%5.05ct | Round | E | SI1 | Ideal
From $1,476
Compare at $10,990
IGISave 80.6%5.05ct | Round | F | VS1 | Excellent
From $1,872
Compare at $9,640
IGISave 69.6%5.05ct | Round | D | IF | Ideal
From $15,346
Compare at $50,550
GIASave 68.4%5.05ct | Round | D | VVS1 | Ideal
From $13,781
Compare at $43,586
GIASave 43.7%5.05ct | Round | F | VS1 | Excellent
From $4,188
Compare at $7,436
GIASave 70.8%5.05ct | Round | E | VVS1 | Excellent
From $9,953
Compare at $34,142
GIASave 80.7%5.05ct | Round | F | VVS1 | Excellent
From $7,663
Compare at $39,700
GIASave 26.1%5.05ct | Round | D | VVS1 | Ideal
From $37,485
Compare at $50,690
GIASave 72.4%5.05ct | Round | E | IF | Excellent
From $18,096
Compare at $65,650
GIASave 72.5%5.05ct | Round | D | VVS1 | Excellent
From $11,893
Compare at $43,196
GIASave 72.5%5.05ct | Round | D | VVS1 | Excellent
From $11,893
Compare at $43,196
IGISave 73.6%5.05ct | Round | H | VS1 | Ideal
From $2,386
Compare at $9,024
IGISave 73.7%5.05ct | Round | E | VS2 | Ideal
From $3,161
Compare at $12,032
5.05ct | Round | E | VS2 | Ideal
From $1,809
Compare at $11,440
5.05ct | Round | F | VS1 | Ideal
From $1,885
Compare at $11,660
IGISave 63.2%5.05ct | Round | F | SI1 | Ideal
From $2,047
Compare at $5,570
IGISave 69.6%5.05ct | Round | E | IF | Ideal
From $14,473
Compare at $47,670
IGISave 83.6%5.05ct | Round | F | VS2 | Ideal
From $1,095
Compare at $6,690
IGISave 91.3%5.05ct | Round | F | VVS2 | Ideal
From $1,144
Compare at $13,160
IGISave 90.4%5.05ct | Round | F | VS1 | Ideal
From $1,119
Compare at $11,660
IGISave 75.9%5.05ct | Round | E | VVS2 | Ideal
From $1,561
Compare at $6,470
IGISave 75.9%5.05ct | Round | E | VVS2 | Ideal
From $1,561
Compare at $6,470
IGISave 66.1%5.05ct | Round | E | VS2 | Excellent
From $1,318
Compare at $3,891
IGISave 75.9%5.05ct | Round | E | VVS2 | Ideal
From $1,561
Compare at $6,470
IGISave 75.9%5.05ct | Round | E | VVS2 | Ideal
From $1,561
Compare at $6,470
IGISave 80.3%5.05ct | Round | D | VS1 | Ideal
From $2,132
Compare at $10,830
IGISave 75.9%5.05ct | Round | E | VVS2 | Ideal
From $1,561
Compare at $6,470
IGISave 85.4%5.05ct | Round | F | VS1 | Excellent
From $1,346
Compare at $9,190
IGISave 82.6%5.05ct | Round | E | VVS2 | Ideal
From $1,158
Compare at $6,660
IGISave 76.6%5.05ct | Round | E | VVS2 | Ideal
From $1,561
Compare at $6,660
IGISave 82.6%5.05ct | Round | E | VVS2 | Ideal
From $1,158
Compare at $6,660
IGISave 76.6%5.05ct | Round | E | VVS2 | Ideal
From $1,561
Compare at $6,660
IGISave 82.8%5.05ct | Round | E | VVS2 | Ideal
From $1,158
Compare at $6,730
IGISave 82.8%5.05ct | Round | E | VVS2 | Ideal
From $1,158
Compare at $6,730
IGISave 83.8%5.05ct | Round | E | VVS2 | Ideal
From $1,158
Compare at $7,150
IGISave 82.8%5.05ct | Round | E | VVS2 | Ideal
From $1,158
Compare at $6,730
IGISave 82.8%5.05ct | Round | E | VVS2 | Ideal
From $1,158
Compare at $6,730
IGISave 84.7%5.05ct | Round | F | SI1 | Ideal
From $1,348
Compare at $8,830
IGISave 82.7%5.05ct | Round | E | VVS2 | Ideal
From $1,149
Compare at $6,660
IGISave 82.7%5.05ct | Round | E | VVS2 | Ideal
From $1,149
Compare at $6,660
IGISave 32.3%5.05ct | Round | E | VVS2 | Ideal
From $1,842
Compare at $2,722
IGISave 61.6%5.05ct | Round | F | VVS1 | Excellent
From $1,956
Compare at $5,100
IGISave 91.3%5.05ct | Round | F | VVS2 | Ideal
From $1,144
Compare at $13,160
IGISave 82.8%5.05ct | Round | E | VVS2 | Ideal
From $1,158
Compare at $6,730
IGISave 83.2%5.05ct | Round | E | VVS2 | Ideal
From $1,119
Compare at $6,660
IGISave 53%5.05ct | Round | F | VVS2 | Excellent
From $1,225
Compare at $2,605
IGISave 83.2%5.05ct | Round | E | VVS2 | Ideal
From $1,119
Compare at $6,660
IGISave 27.6%5.05ct | Round | E | VVS2 | Ideal
From $2,303
Compare at $3,182
Entry pricing in this category starts around $1,010.
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 $50,170 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 $1,474 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 3,984 comparable stones in this segment. Prices start around $1,010 and go up to $51,180.
Based on the latest market data, the average asking price is about $2,023 with a median around $1,474.
The observed spread is roughly $50,170 across tracked listings, which is about 98.0% 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 $1,474, 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 12 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 $50,170 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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