5.1 Carat Oval Lab Grown Diamond Prices Comparison
As of May 2026, 5.1 carat oval lab grown diamonds usually range from $555 to $19,492, with an average price of $3,730.In the last month, prices for these diamonds are down 2%.Compare 306 verified listings across 9 retailers tracked by CaratRadar.
5.1 Carat Oval Lab Grown Diamond Market Overview
CaratRadar currently tracks 306 verified 5.1-carat oval lab grown diamonds listed across 9 online retailers. Prices in this segment range from $555 to $19,492, with an average asking price of $3,730 and a median of $2,737.
The price spread of $18,937 (97.2% 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.
306 diamonds tracked in this segment
Price range: $555 to $19,492
Average price: $3,730
Median price: $2,737
Available across 9 retailers
Savings potential: up to 97.2%
Price Range Overview
As of May 29, 2026Real market range for this carat, shape, and diamond type.
306
$555
$3,730
$2,737
$19,492
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 70.9%IGI | 5.1ct | Oval | E | SI1 | Ideal
From $770
Compare at $2,647
Save 70.6%IGI | 5.1ct | Oval | E | SI1 | Ideal
From $780
Compare at $2,650
Save 70.6%IGI | 5.1ct | Oval | E | SI1 | Ideal
From $780
Compare at $2,650
Save 80%IGI | 5.16ct | Oval | H | VS2 | Ideal
From $783
Compare at $3,910
Save 67.3%IGI | 5.1ct | Oval | E | SI1 | Excellent
From $864
Compare at $2,642
Save 61.6%IGI | 5.1ct | Oval | F | SI1 | Ideal
From $864
Compare at $2,252
Save 61.6%IGI | 5.1ct | Oval | F | SI1 | Ideal
From $864
Compare at $2,252
Save 61.6%IGI | 5.1ct | Oval | F | SI1 | Ideal
From $864
Compare at $2,252
Save 61.6%IGI | 5.1ct | Oval | F | SI1 | Excellent
From $864
Compare at $2,252
Save 61.6%IGI | 5.1ct | Oval | F | SI1 | Ideal
From $864
Compare at $2,252
Save 67.3%IGI | 5.1ct | Oval | E | SI1 | Excellent
From $864
Compare at $2,642
Save 66.8%IGI | 5.1ct | Oval | E | SI1 | Ideal
From $879
Compare at $2,644
Save 66.8%IGI | 5.1ct | Oval | E | SI1 | Ideal
From $879
Compare at $2,644
Save 66.8%IGI | 5.1ct | Oval | E | SI1 | Ideal
From $879
Compare at $2,644
Save 66.2%IGI | 5.1ct | Oval | E | SI1 | Ideal
From $894
Compare at $2,647
Save 66.2%IGI | 5.1ct | Oval | E | SI1 | Ideal
From $894
Compare at $2,647
Save 63.6%IGI | 5.1ct | Oval | G | VVS2 | Excellent
From $910
Compare at $2,502
Save 61.4%IGI | 5.1ct | Oval | G | VS1 | Ideal
From $911
Compare at $2,359
Save 79%IGI | 5.1ct | Oval | H | VS1 | Ideal
From $920
Compare at $4,390
Save 71.4%IGI | 5.1ct | Oval | G | VS1 | Excellent
From $927
Compare at $3,240
Save 71.5%IGI | 5.13ct | Oval | G | VVS2 | Ideal
From $930
Compare at $3,259
Save 71.1%IGI | 5.1ct | Oval | G | VVS2 | Very Good
From $937
Compare at $3,240
Save 71.1%IGI | 5.1ct | Oval | G | VVS2 | Very Good
From $937
Compare at $3,240
Save 71.1%IGI | 5.12ct | Oval | G | VVS2 | Ideal
From $940
Compare at $3,253
Save 62.5%IGI | 5.1ct | Oval | G | VVS2 | Very Good
From $945
Compare at $2,517
Save 59.9%IGI | 5.1ct | Oval | F | VS2 | Very Good
From $955
Compare at $2,379
Save 58.8%IGI | 5.12ct | Oval | G | VS2 | Ideal
From $978
Compare at $2,376
Save 49.3%IGI | 5.2ct | Oval | F | VS1 | Very Good
From $994
Compare at $1,961
Save 63.7%IGI | 5.1ct | Oval | H | VVS2 | Ideal
From $995
Compare at $2,740
Save 60.6%IGI | 5.1ct | Oval | F | VVS2 | Very Good
From $1,023
Compare at $2,597
Save 72.6%IGI | 5.1ct | Oval | F | VVS2 | Very Good
From $1,034
Compare at $3,778
Save 23.9%IGI | 5.2ct | Oval | F | VVS2 | Very Good
From $1,046
Compare at $1,375
Save 27.7%IGI | 5.1ct | Oval | F | VVS2 | Very Good
From $1,047
Compare at $1,447
Save 79.8%IGI | 5.19ct | Oval | G | VS1 | Excellent
From $1,048
Compare at $5,200
Save 41.6%IGI | 5.11ct | Oval | F | VS1 | Very Good
From $1,048
Compare at $1,794
Save 62.5%IGI | 5.16ct | Oval | E | SI1 | Very Good
From $1,049
Compare at $2,795
Save 56.9%IGI | 5.1ct | Oval | F | VS1 | Very Good
From $1,053
Compare at $2,441
Save 43.2%IGI | 5.1ct | Oval | F | VS1 | Excellent
From $1,055
Compare at $1,858
Save 79.7%IGI | 5.2ct | Oval | F | VS2 | Ideal
From $1,057
Compare at $5,200
Save 56.9%IGI | 5.2ct | Oval | G | VS2 | Very Good
From $1,062
Compare at $2,464
Save 73.8%IGI | 5.1ct | Oval | E | VS1 | Ideal
From $1,063
Compare at $4,056
Save 57%IGI | 5.14ct | Oval | F | VS1 | Ideal
From $1,065
Compare at $2,477
Save 59.7%IGI | 5.14ct | Oval | F | VVS2 | Ideal
From $1,065
Compare at $2,643
Save 59.7%IGI | 5.14ct | Oval | F | VVS2 | Excellent
From $1,065
Compare at $2,643
Save 59.7%IGI | 5.14ct | Oval | F | VVS2 | Excellent
From $1,065
Compare at $2,643
Save 40.9%IGI | 5.12ct | Oval | E | VS2 | Very Good
From $1,070
Compare at $1,810
Save 74.1%IGI | 5.13ct | Oval | E | VS1 | Very Good
From $1,075
Compare at $4,155
Save 74.1%IGI | 5.13ct | Oval | E | VS1 | Very Good
From $1,075
Compare at $4,155
Save 79.9%IGI | 5.15ct | Oval | H | VS2 | Ideal
From $1,077
Compare at $5,350
Save 30.7%IGI | 5.11ct | Oval | H | VS2 | Ideal
From $1,080
Compare at $1,559
Entry pricing in this category starts around $555.
What to Know When Shopping for 5.1 Carat Oval Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $18,937 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 $2,737 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.
- Oval diamonds can appear larger than rounds of the same carat weight due to their elongated face-up area. Watch for the bow-tie effect in lower-quality cuts.
Frequently Asked Questions
We currently track 306 comparable stones in this segment. Prices start around $555 and go up to $19,492.
Based on the latest market data, the average asking price is about $3,730 with a median around $2,737.
The observed spread is roughly $18,937 across tracked listings, which is about 97.2% 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 $3,730. The median price is $2,737, 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 9 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 $18,937 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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Tracking Lab Grown inventory for 5.1 carat Oval diamonds.