5.1 Carat Marquise Lab Grown Diamond Prices Comparison
As of February 2026, 5.1 carat marquise lab grown diamonds usually range from $779 to $35,420, with an average price of $1,359.In the last month, prices for these diamonds are down 2.1%.Compare 2,114 verified listings across 12 retailers tracked by CaratRadar.
5.1 Carat Marquise Lab Grown Diamond Market Overview
CaratRadar currently tracks 2,114 verified 5.1-carat marquise lab grown diamonds listed across 12 online retailers. Prices in this segment range from $779 to $35,420, with an average asking price of $1,359 and a median of $1,247.
The price spread of $34,641 (97.8% 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.
2,114 diamonds tracked in this segment
Price range: $779 to $35,420
Average price: $1,359
Median price: $1,247
Available across 12 retailers
Savings potential: up to 97.8%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
2,114
$779
$1,359
$1,247
$35,420
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 79.7%5.05ct | Marquise | F | VS1 | Excellent
From $1,919
Compare at $9,440
IGISave 41%5.05ct | Marquise | H | VS1 | Excellent
From $2,619
Compare at $4,441
IGISave 80.1%5.05ct | Marquise | E | VVS2 | Ideal
From $2,013
Compare at $10,090
IGISave 91%5.05ct | Marquise | F | VVS2 | Ideal
From $1,022
Compare at $11,320
IGISave 80.9%5.05ct | Marquise | D | VVS2 | Very Good
From $1,738
Compare at $9,110
IGISave 82.9%5.05ct | Marquise | E | VVS2 | Ideal
From $973
Compare at $5,680
IGISave 83%5.05ct | Marquise | E | VVS2 | Ideal
From $1,020
Compare at $5,990
IGISave 81.9%5.05ct | Marquise | E | VS1 | Ideal
From $930
Compare at $5,130
IGISave 81.3%5.05ct | Marquise | E | VS2 | Ideal
From $890
Compare at $4,760
IGISave 82.5%5.05ct | Marquise | E | VS1 | Ideal
From $900
Compare at $5,130
IGISave 81.9%5.05ct | Marquise | E | VS1 | Ideal
From $930
Compare at $5,130
IGISave 91.1%5.05ct | Marquise | E | VS2 | Ideal
From $881
Compare at $9,930
IGISave 81.9%5.05ct | Marquise | E | VS1 | Ideal
From $930
Compare at $5,130
IGISave 81.9%5.05ct | Marquise | E | VS1 | Ideal
From $930
Compare at $5,130
IGISave 82.4%5.05ct | Marquise | E | VVS2 | Ideal
From $1,011
Compare at $5,740
IGISave 81.3%5.05ct | Marquise | E | VS2 | Ideal
From $890
Compare at $4,760
IGISave 75.9%5.05ct | Marquise | D | VS1 | Ideal
From $1,458
Compare at $6,040
IGISave 83.3%5.05ct | Marquise | E | VVS2 | Ideal
From $1,011
Compare at $6,050
IGISave 81.3%5.05ct | Marquise | E | VS2 | Ideal
From $890
Compare at $4,760
IGISave 81.5%5.05ct | Marquise | E | VS2 | Ideal
From $881
Compare at $4,760
IGISave 50.2%5.05ct | Marquise | H | VS1 | Ideal
From $1,121
Compare at $2,250
IGISave 91.4%5.05ct | Marquise | F | VS1 | Ideal
From $890
Compare at $10,340
IGISave 91.2%5.05ct | Marquise | E | VVS2 | Ideal
From $1,094
Compare at $12,400
IGISave 69.9%5.05ct | Marquise | E | VS1 | Ideal
From $1,260
Compare at $4,190
IGISave 74.9%5.05ct | Marquise | E | VVS2 | Ideal
From $1,343
Compare at $5,350
IGISave 75.8%5.05ct | Marquise | E | VVS2 | Ideal
From $1,297
Compare at $5,350
IGISave 91.9%5.05ct | Marquise | D | VS2 | Ideal
From $884
Compare at $10,910
IGISave 69.9%5.05ct | Marquise | E | VS1 | Ideal
From $1,260
Compare at $4,190
IGISave 71%5.05ct | Marquise | E | VS1 | Ideal
From $1,260
Compare at $4,340
IGISave 71%5.05ct | Marquise | E | VS1 | Ideal
From $1,260
Compare at $4,340
IGISave 76.6%5.05ct | Marquise | D | VS1 | Ideal
From $1,458
Compare at $6,230
IGISave 69.9%5.05ct | Marquise | E | VS1 | Ideal
From $1,260
Compare at $4,190
IGISave 75.5%5.05ct | Marquise | E | VVS2 | Ideal
From $1,312
Compare at $5,350
IGISave 75.2%5.05ct | Marquise | E | VVS2 | Ideal
From $1,328
Compare at $5,350
IGISave 75.6%5.05ct | Marquise | E | VS2 | Ideal
From $1,251
Compare at $5,130
IGISave 69.9%5.05ct | Marquise | E | VS1 | Ideal
From $1,260
Compare at $4,190
IGISave 86.2%5.05ct | Marquise | G | VS2 | Ideal
From $1,128
Compare at $8,170
IGISave 69.9%5.05ct | Marquise | E | VS1 | Ideal
From $1,260
Compare at $4,190
IGISave 69.9%5.05ct | Marquise | E | VS1 | Ideal
From $1,260
Compare at $4,190
IGISave 76.4%5.05ct | Marquise | E | VS1 | Ideal
From $1,022
Compare at $4,340
IGISave 75.9%5.05ct | Marquise | D | VS1 | Ideal
From $1,458
Compare at $6,040
IGISave 69.9%5.05ct | Marquise | E | VS1 | Ideal
From $1,260
Compare at $4,190
IGISave 79.2%5.05ct | Marquise | E | VVS2 | Ideal
From $1,114
Compare at $5,350
IGISave 76.4%5.05ct | Marquise | E | VVS2 | Ideal
From $1,312
Compare at $5,555
IGISave 75.9%5.05ct | Marquise | D | VS1 | Ideal
From $1,473
Compare at $6,100
IGISave 75.9%5.05ct | Marquise | D | VS1 | Ideal
From $1,458
Compare at $6,040
IGISave 69.9%5.05ct | Marquise | E | VS1 | Ideal
From $1,260
Compare at $4,190
IGISave 71.2%5.05ct | Marquise | E | VS2 | Ideal
From $1,177
Compare at $4,090
IGISave 75.5%5.05ct | Marquise | E | VVS2 | Ideal
From $1,312
Compare at $5,350
IGISave 71.6%5.05ct | Marquise | E | VS2 | Ideal
From $1,161
Compare at $4,090
Entry pricing in this category starts around $779.
What to Know When Shopping for 5.1 Carat Marquise Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $34,641 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 $1,247 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.
- Marquise diamonds maximize carat weight face-up and appear larger than their actual weight. Check symmetry carefully.
Frequently Asked Questions
We currently track 2,114 comparable stones in this segment. Prices start around $779 and go up to $35,420.
Based on the latest market data, the average asking price is about $1,359 with a median around $1,247.
The observed spread is roughly $34,641 across tracked listings, which is about 97.8% 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 $1,247, 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 $34,641 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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