5.1 Carat Radiant Lab Grown Diamond Prices Comparison
As of February 2026, 5.1 carat radiant lab grown diamonds usually range from $868 to $47,670, with an average price of $2,053.In the last month, prices for these diamonds are down 0.3%.Compare 1,706 verified listings across 11 retailers tracked by CaratRadar.
5.1 Carat Radiant Lab Grown Diamond Market Overview
CaratRadar currently tracks 1,706 verified 5.1-carat radiant lab grown diamonds listed across 11 online retailers. Prices in this segment range from $868 to $47,670, with an average asking price of $2,053 and a median of $1,363.
The price spread of $46,802 (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.
1,706 diamonds tracked in this segment
Price range: $868 to $47,670
Average price: $2,053
Median price: $1,363
Available across 11 retailers
Savings potential: up to 98.2%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
1,706
$868
$2,053
$1,363
$47,670
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 79.4%5.05ct | Radiant | G | VS2 | Very Good
From $1,227
Compare at $5,960
IGISave 85.4%5.05ct | Radiant | G | VVS2 | Excellent
From $1,459
Compare at $9,990
IGISave 58.3%5.05ct | Radiant | E | VVS2 | Very Good
From $1,724
Compare at $4,132
IGISave 84.1%5.05ct | Radiant | F | VVS2 | Ideal
From $1,559
Compare at $9,820
IGISave 30.4%5.05ct | Radiant | F | VS1 | Excellent
From $1,439
Compare at $2,068
IGISave 62.3%5.05ct | Radiant | E | VVS2 | Excellent
From $1,829
Compare at $4,853
IGISave 79%5.05ct | Radiant | F | VS1 | Excellent
From $2,175
Compare at $10,340
IGISave 82.5%5.05ct | Radiant | G | VS2 | Very Good
From $1,425
Compare at $8,160
IGISave 70.6%5.05ct | Radiant | E | IF | Excellent
From $19,035
Compare at $64,800
IGISave 85.8%5.05ct | Radiant | D | VS2 | Ideal
From $1,551
Compare at $10,900
IGISave 78.6%5.05ct | Radiant | E | VS2 | Excellent
From $1,864
Compare at $8,710
IGISave 74.2%5.05ct | Radiant | D | VS1 | Ideal
From $1,328
Compare at $5,150
IGISave 84.3%5.05ct | Radiant | D | VS2 | Ideal
From $1,328
Compare at $8,440
IGISave 84.6%5.05ct | Radiant | D | VS2 | Ideal
From $1,298
Compare at $8,440
IGISave 83.6%5.05ct | Radiant | E | VS1 | Ideal
From $1,022
Compare at $6,230
IGISave 66.6%5.05ct | Radiant | D | VVS2 | Ideal
From $2,122
Compare at $6,360
IGISave 91.8%5.05ct | Radiant | E | VS1 | Ideal
From $1,022
Compare at $12,490
IGISave 83.6%5.05ct | Radiant | E | VS1 | Ideal
From $1,022
Compare at $6,230
IGISave 32.8%5.05ct | Radiant | F | SI1 | Ideal
From $1,078
Compare at $1,605
IGISave 87.6%5.05ct | Radiant | E | VVS2 | Ideal
From $1,550
Compare at $12,460
IGISave 83.6%5.05ct | Radiant | E | VS1 | Ideal
From $1,022
Compare at $6,230
IGISave 83.6%5.05ct | Radiant | E | VS1 | Ideal
From $1,030
Compare at $6,300
IGISave 83.6%5.05ct | Radiant | E | VS1 | Ideal
From $1,030
Compare at $6,300
IGISave 83.6%5.05ct | Radiant | E | VS1 | Ideal
From $1,030
Compare at $6,300
IGISave 83.6%5.05ct | Radiant | E | VS1 | Ideal
From $1,030
Compare at $6,300
IGISave 83.6%5.05ct | Radiant | E | VS1 | Ideal
From $1,030
Compare at $6,300
IGISave 83.6%5.05ct | Radiant | E | VS1 | Ideal
From $1,030
Compare at $6,300
IGISave 85%5.05ct | Radiant | F | VVS2 | Ideal
From $1,679
Compare at $11,200
IGISave 61.5%5.05ct | Radiant | E | SI1 | Ideal
From $1,078
Compare at $2,801
IGISave 79.7%5.05ct | Radiant | E | VVS2 | Very Good
From $2,051
Compare at $10,080
IGISave 81.6%5.05ct | Radiant | F | VVS2 | Ideal
From $2,084
Compare at $11,310
IGISave 45.2%5.05ct | Radiant | G | VS2 | Very Good
From $1,328
Compare at $2,422
IGISave 51.6%5.05ct | Radiant | F | VVS2 | Excellent
From $3,358
Compare at $6,940
IGISave 79.6%5.05ct | Radiant | H | VVS2 | Excellent
From $1,225
Compare at $6,020
IGISave 86.5%5.05ct | Radiant | D | VS1 | Ideal
From $1,986
Compare at $14,700
IGISave 88.5%5.05ct | Radiant | F | VS1 | Ideal
From $1,127
Compare at $9,820
IGISave 88%5.05ct | Radiant | F | VVS2 | Ideal
From $1,347
Compare at $11,200
IGISave 19.3%5.05ct | Radiant | F | VS2 | Very Good
From $1,137
Compare at $1,410
IGISave 55.5%5.05ct | Radiant | E | VVS2 | Ideal
From $1,654
Compare at $3,719
IGISave 66%5.05ct | Radiant | E | VS2 | Ideal
From $1,367
Compare at $4,017
IGISave 84.9%5.05ct | Radiant | F | VVS2 | Ideal
From $1,544
Compare at $10,230
IGISave 89.7%5.05ct | Radiant | E | VS2 | Very Good
From $1,022
Compare at $9,930
IGISave 60.3%5.05ct | Radiant | F | VS2 | Excellent
From $1,297
Compare at $3,266
IGISave 63.3%5.05ct | Radiant | F | VS1 | Ideal
From $1,104
Compare at $3,006
IGISave 79%5.05ct | Radiant | E | VVS1 | Ideal
From $2,611
Compare at $12,410
IGISave 87.2%5.05ct | Radiant | E | VS1 | Ideal
From $1,896
Compare at $14,790
IGISave 40.5%5.05ct | Radiant | E | VS1 | Very Good
From $1,896
Compare at $3,187
GIASave 52.5%5.05ct | Radiant | E | VS1 | Excellent
From $3,105
Compare at $6,541
GIASave 78.2%5.05ct | Radiant | G | VS2 | Excellent
From $2,271
Compare at $10,400
GIASave 68%5.05ct | Radiant | E | VVS2 | Excellent
From $4,088
Compare at $12,780
Entry pricing in this category starts around $868.
What to Know When Shopping for 5.1 Carat Radiant Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $46,802 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 $1,363 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.
- Radiant cuts combine the elegance of emerald shapes with the brilliance of round cuts, offering good value per carat.
Frequently Asked Questions
We currently track 1,706 comparable stones in this segment. Prices start around $868 and go up to $47,670.
Based on the latest market data, the average asking price is about $2,053 with a median around $1,363.
The observed spread is roughly $46,802 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 $1,363, 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 11 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 $46,802 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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