15 Carat Oval Lab Grown Diamond Prices Comparison
As of October 2026, 15 carat oval lab grown diamonds in the 15.00–15.99 carat benchmark range usually range from $2,509 to $1,818,411, with an average price of $13,649.In the last month, prices for these diamonds are down 3.3%.Compare 116 verified listings across 8 retailers tracked by CaratRadar.
15 Carat Oval Lab Grown Diamond Market Overview
CaratRadar currently tracks 116 verified 15-carat oval lab grown diamonds in the 15.00–15.99 carat benchmark range, listed across 8 online retailers. Prices in this segment range from $2,509 to $1,818,411, with an average asking price of $13,649 and a median of $10,031.
The price spread of $1,815,902 (99.9% 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 use the same benchmark range throughout the page and 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.
116 diamonds tracked in the 15.00–15.99 carat benchmark
Price range: $2,509 to $1,818,411
Average price: $13,649
Median price: $10,031
Available across 8 retailers
Savings potential: up to 99.9%
Price Range Overview
As of Oct 14, 2026Real market range for this carat, shape, and diamond type.
116
$2,509
$13,649
$10,031
$1,818,411
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers in the same benchmark range and open any listing for full details.
Save 78.3%IGI | 15.05ct | Oval | I | SI1 | Ideal
From $2,509
Compare at $11,570
Save 77.7%IGI | 15.01ct | Oval | F | VS2 | Excellent
From $3,028
Compare at $13,589
Save 79.6%IGI | 15.01ct | Oval | F | VS2 | Ideal
From $3,028
Compare at $14,825
Save 79.6%IGI | 15.02ct | Oval | F | VS2 | Ideal
From $3,030
Compare at $14,835
Save 77.8%IGI | 15.05ct | Oval | F | VS2 | Excellent
From $3,036
Compare at $13,659
Save 79.6%IGI | 15.04ct | Oval | G | VS1 | Ideal
From $3,192
Compare at $15,637
Save 79.6%IGI | 15.05ct | Oval | H | VS2 | Ideal
From $3,194
Compare at $15,647
Save 79.6%IGI | 15ct | Oval | F | VS1 | Very Good
From $3,236
Compare at $15,855
Save 79.6%IGI | 15.02ct | Oval | F | VS1 | Ideal
From $3,241
Compare at $15,876
Save 79.6%IGI | 15.05ct | Oval | F | VS1 | Ideal
From $3,247
Compare at $15,908
Save 79.6%IGI | 15ct | Oval | F | VS1 | Ideal
From $3,263
Compare at $15,985
Save 77.2%IGI | 15.02ct | Oval | F | VS1 | Excellent
From $3,267
Compare at $14,304
Save 79.6%IGI | 15.04ct | Oval | F | VS1 | Ideal
From $3,271
Compare at $16,028
Save 79.6%IGI | 15.05ct | Oval | F | VS1 | Ideal
From $3,273
Compare at $16,038
Save 77.4%IGI | 15.05ct | Oval | F | VS1 | Ideal
From $3,379
Compare at $14,930
Save 76.1%IGI | 15ct | Oval | G | VVS2 | Excellent
From $3,584
Compare at $14,972
Save 75.2%IGI | 15.06ct | Oval | F | VS1 | Excellent
From $3,588
Compare at $14,466
Save 71.5%IGI | 15.02ct | Oval | G | VS2 | Ideal
From $3,589
Compare at $12,580
Save 79.3%IGI | 15.03ct | Oval | F | VVS2 | Excellent
From $3,650
Compare at $17,622
Save 75%IGI | 15.03ct | Oval | G | VVS2 | Excellent
From $3,829
Compare at $15,331
Save 73.2%IGI | 15ct | Oval | F | VS2 | Ideal
From $3,918
Compare at $14,609
Save 30.4%IGI | 15.07ct | Oval | K | VS1 | Good
From $3,962
Compare at $5,695
Save 73.9%IGI | 15.06ct | Oval | G | VVS2 | Very Good
From $3,965
Compare at $15,204
Save 70%IGI | 15.06ct | Oval | G | VS1 | Excellent
From $3,970
Compare at $13,239
Save 72.6%IGI | 15.08ct | Oval | F | VS1 | Ideal
From $4,092
Compare at $14,960
Save 68.5%IGI | 15.06ct | Oval | G | VS1 | Ideal
From $4,117
Compare at $13,059
Save 73%IGI | 15.11ct | Oval | G | VVS2 | Good
From $4,131
Compare at $15,301
Save 67%IGI | 15.07ct | Oval | G | VS1 | Very Good
From $4,333
Compare at $13,114
Save 78.3%IGI | 15ct | Oval | F | VS1 | Excellent
From $4,465
Compare at $20,530
Save 77%IGI | 15.03ct | Oval | F | VVS2 | Ideal
From $4,687
Compare at $20,400
Save 77%IGI | 15.04ct | Oval | F | VVS2 | Ideal
From $4,690
Compare at $20,410
Save 77%IGI | 15.05ct | Oval | F | VVS2 | Good
From $4,693
Compare at $20,430
Save 77%IGI | 15.06ct | Oval | F | VVS2 | Ideal
From $4,696
Compare at $20,440
Save 77%IGI | 15.06ct | Oval | F | VVS2 | Ideal
From $4,696
Compare at $20,440
Save 77%IGI | 15.09ct | Oval | F | VVS2 | Very Good
From $4,706
Compare at $20,480
Save 46.9%IGI | 15.41ct | Oval | I | VS1 | Excellent
From $4,739
Compare at $8,920
Save 76.9%IGI | 15.36ct | Oval | F | VVS2 | Good
From $4,790
Compare at $20,700
Save 75.2%IGI | 15.02ct | Oval | I | VVS2 | Ideal
From $4,806
Compare at $19,410
Save 76.7%IGI | 15.54ct | Oval | F | VVS2 | Ideal
From $4,846
Compare at $20,800
Save 75%IGI | 15.04ct | Oval | I | VVS2 | Ideal
From $4,859
Compare at $19,440
Save 78.8%IGI | 15.05ct | Oval | F | VVS2 | Very Good
From $4,876
Compare at $22,980
Save 68.2%IGI | 15.01ct | Oval | F | VVS2 | Excellent
From $4,894
Compare at $15,386
Save 54.6%IGI | 15.02ct | Oval | H | VS1 | Ideal
From $4,897
Compare at $10,780
Save 75.7%IGI | 15ct | Oval | F | VVS2 | Very Good
From $4,951
Compare at $20,360
Save 73.4%IGI | 15.02ct | Oval | F | VVS2 | Excellent
From $4,958
Compare at $18,609
Save 67.9%IGI | 15.03ct | Oval | F | VVS2 | Excellent
From $4,961
Compare at $15,434
Save 68%IGI | 15.09ct | Oval | F | VVS2 | Excellent
From $4,981
Compare at $15,552
Save 68%IGI | 15.11ct | Oval | F | VVS2 | Very Good
From $4,987
Compare at $15,593
Save 67.3%IGI | 15.05ct | Oval | G | VVS2 | Excellent
From $4,990
Compare at $15,260
Save 54.6%IGI | 15.32ct | Oval | H | VS1 | Ideal
From $4,995
Compare at $11,000
Entry pricing in this benchmark range starts around $2,509.
What to Know When Shopping for 15 Carat Oval Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $1,815,902 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 $10,031 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 116 comparable stones in the 15.00–15.99 carat benchmark range. Prices start around $2,509 and go up to $1,818,411.
Based on the latest market data, the average asking price is about $13,649 with a median around $10,031.
The observed spread is roughly $1,815,902 across tracked listings, which is about 99.9% from highest to lowest offer in the 15.00–15.99 carat benchmark range.
We refresh pricing data daily so these pages stay current with market changes.
Based on completed market data, the fair market benchmark is $13,649. The median price is $10,031, 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 8 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 $1,815,902 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.
Related Price Categories
Explore adjacent carat ranges and shapes to compare market shifts.
14 Carat Oval Lab Grown Diamond Prices
15 Carat Radiant Lab Grown Diamond Prices
15 Carat Emerald Lab Grown Diamond Prices
15 Carat Pear Lab Grown Diamond Prices
15 Carat Cushion Lab Grown Diamond Prices
15 Carat Marquise Lab Grown Diamond Prices
15 Carat Round Lab Grown Diamond Prices
15 Carat Heart Lab Grown Diamond Prices
15 Carat Asscher Lab Grown Diamond Prices
15 Carat Princess Lab Grown Diamond Prices
Tracking Lab Grown inventory for the 15.00–15.99 carat Oval diamond benchmark.