5.1 Carat Marquise Lab Grown Diamond Prices Comparison
As of May 2026, 5.1 carat marquise lab grown diamonds usually range from $560 to $13,950, with an average price of $3,499.In the last month, prices for these diamonds are down 0.6%.Compare 63 verified listings across 7 retailers tracked by CaratRadar.
5.1 Carat Marquise Lab Grown Diamond Market Overview
CaratRadar currently tracks 63 verified 5.1-carat marquise lab grown diamonds listed across 7 online retailers. Prices in this segment range from $560 to $13,950, with an average asking price of $3,499 and a median of $2,662.
The price spread of $13,390 (96.0% 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.
63 diamonds tracked in this segment
Price range: $560 to $13,950
Average price: $3,499
Median price: $2,662
Available across 7 retailers
Savings potential: up to 96.0%
Price Range Overview
As of May 30, 2026Real market range for this carat, shape, and diamond type.
63
$560
$3,499
$2,662
$13,950
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 30.1%IGI | 5.1ct | Marquise | E | VVS2 | Ideal
From $915
Compare at $1,310
Save 60.1%IGI | 5.1ct | Marquise | F | VS2 | Ideal
From $923
Compare at $2,316
Save 77%IGI | 5.1ct | Marquise | F | VS1 | Ideal
From $1,019
Compare at $4,440
Save 77%IGI | 5.1ct | Marquise | F | VS1 | Ideal
From $1,019
Compare at $4,440
Save 77%IGI | 5.1ct | Marquise | F | VS1 | Ideal
From $1,019
Compare at $4,440
Save 74.2%IGI | 5.12ct | Marquise | E | VS2 | Excellent
From $1,051
Compare at $4,072
Save 58.6%IGI | 5.18ct | Marquise | F | VS1 | Ideal
From $1,054
Compare at $2,546
Save 74.8%IGI | 5.1ct | Marquise | F | VS1 | Ideal
From $1,108
Compare at $4,390
Save 74.8%IGI | 5.1ct | Marquise | F | VS1 | Ideal
From $1,108
Compare at $4,390
Save 74.8%IGI | 5.1ct | Marquise | F | VS1 | Ideal
From $1,108
Compare at $4,390
Save 74.8%IGI | 5.1ct | Marquise | F | VS1 | Ideal
From $1,108
Compare at $4,390
Save 74.8%IGI | 5.1ct | Marquise | F | VS1 | Ideal
From $1,108
Compare at $4,390
Save 74.8%IGI | 5.1ct | Marquise | F | VS1 | Ideal
From $1,108
Compare at $4,390
Save 53.4%IGI | 5.1ct | Marquise | F | VS1 | Ideal
From $1,108
Compare at $2,378
Save 74.8%IGI | 5.1ct | Marquise | F | VS1 | Ideal
From $1,108
Compare at $4,390
Save 74.8%IGI | 5.1ct | Marquise | F | VS1 | Ideal
From $1,108
Compare at $4,390
Save 79.5%IGI | 5.1ct | Marquise | F | VS2 | Ideal
From $1,109
Compare at $5,420
Save 57.3%IGI | 5.1ct | Marquise | F | VVS2 | Ideal
From $1,112
Compare at $2,605
Save 54.8%IGI | 5.12ct | Marquise | F | VS1 | Very Good
From $1,116
Compare at $2,467
Save 74.7%IGI | 5.1ct | Marquise | F | VS1 | Ideal
From $1,125
Compare at $4,440
Save 52%IGI | 5.11ct | Marquise | G | VS1 | Very Good
From $1,164
Compare at $2,426
Save 55.3%IGI | 5.16ct | Marquise | G | VVS2 | Ideal
From $1,181
Compare at $2,645
Save 38.8%IGI | 5.1ct | Marquise | D | VS1 | Ideal
From $1,213
Compare at $1,982
Save 53.3%IGI | 5.1ct | Marquise | E | VS1 | Very Good
From $1,250
Compare at $2,676
Save 76.2%IGI | 5.13ct | Marquise | G | VS2 | Ideal
From $1,291
Compare at $5,420
Save 77.6%IGI | 5.1ct | Marquise | G | VS1 | Ideal
From $1,372
Compare at $6,130
Save 79.4%IGI | 5.1ct | Marquise | F | VVS2 | Ideal
From $1,435
Compare at $6,980
Save 75.5%IGI | 5.1ct | Marquise | F | VS2 | Ideal
From $1,482
Compare at $6,050
Save 38.5%IGI | 5.11ct | Marquise | G | VS2 | Excellent
From $1,615
Compare at $2,628
Save 76.1%IGI | 5.1ct | Marquise | F | VVS2 | Ideal
From $1,768
Compare at $7,390
Save 76.1%IGI | 5.1ct | Marquise | F | VVS2 | Excellent
From $1,804
Compare at $7,540
Save 25.5%IGI | 5.11ct | Marquise | F | VS1 | Ideal
From $1,896
Compare at $2,545
IGI | 5.1ct | Marquise | FANCY | VVS2 | Good
From $1,994
Compare at $1,999
Save 72.9%IGI | 5.11ct | Marquise | FANCY | VS1 | Good
From $2,075
Compare at $7,644
Save 76.3%GCAL | 5.2ct | Marquise | I | VS1 | Excellent
From $2,078
Compare at $8,770
Save 10.3%IGI | 5.1ct | Marquise | G | VS1 | Very Good
From $2,178
Compare at $2,427
Save 52.2%IGI | 5.14ct | Marquise | FANCY | VS1 | Ideal
From $2,338
Compare at $4,889
Save 45.8%IGI | 5.1ct | Marquise | F | VS1 | Ideal
From $2,378
Compare at $4,390
Save 68.6%IGI | 5.11ct | Marquise | FANCY | VS1 | Very Good
From $2,567
Compare at $8,182
Save 72.9%GIA | 5.1ct | Marquise | G | VS1 | Ideal
From $2,568
Compare at $9,480
Save 38.3%IGI | 5.15ct | Marquise | E | VVS1 | Very Good
From $2,570
Compare at $4,163
Save 75.1%IGI | 5.16ct | Marquise | F | VS1 | Very Good
From $2,659
Compare at $10,680
IGI | 5.12ct | Marquise | FANCY | VS1 | Excellent
From $2,702
Compare at $11,261
Save 76.7%GCAL | 5.11ct | Marquise | D | VVS2 | Excellent
From $2,708
Compare at $11,600
Save 76%IGI | 5.1ct | Marquise | FANCY | VVS2 | Excellent
From $2,919
Compare at $12,166
Save 70.3%IGI | 5.16ct | Marquise | FANCY | VS1 | Very Good
From $3,085
Compare at $10,390
Save 52.2%IGI | 5.1ct | Marquise | FANCY | VVS2 | Ideal
From $3,167
Compare at $6,628
Save 71.9%IGI | 5.1ct | Marquise | FANCY | VVS2 | Very Good
From $3,184
Compare at $11,341
Save 54.9%IGI | 5.16ct | Marquise | FANCY | VS2 | Ideal
From $3,233
Compare at $7,165
Save 63.3%IGI | 5.2ct | Marquise | H | VS1 | Ideal
From $3,244
Compare at $8,850
Entry pricing in this category starts around $560.
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 $13,390 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 $2,662 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 63 comparable stones in this segment. Prices start around $560 and go up to $13,950.
Based on the latest market data, the average asking price is about $3,499 with a median around $2,662.
The observed spread is roughly $13,390 across tracked listings, which is about 96.0% 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 $3,499. The median price is $2,662, 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 7 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 $13,390 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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