6.5 Carat Marquise Lab Grown Diamond Prices Comparison
As of April 2026, 6.5 carat marquise lab grown diamonds usually range from $765 to $21,767, with an average price of $4,959.In the last month, prices for these diamonds are flat -0%.Compare 59 verified listings across 5 retailers tracked by CaratRadar.
6.5 Carat Marquise Lab Grown Diamond Market Overview
CaratRadar currently tracks 59 verified 6.5-carat marquise lab grown diamonds listed across 5 online retailers. Prices in this segment range from $765 to $21,767, with an average asking price of $4,959 and a median of $3,523.
The price spread of $21,002 (96.5% 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.
59 diamonds tracked in this segment
Price range: $765 to $21,767
Average price: $4,959
Median price: $3,523
Available across 5 retailers
Savings potential: up to 96.5%
Price Range Overview
As of Apr 14, 2026Real market range for this carat, shape, and diamond type.
59
$765
$4,959
$3,523
$21,767
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 68.8%IGI | 6.5ct | Marquise | F | VS1 | Ideal
From $2,706
Compare at $8,660
Save 88.4%IGI | 6.5ct | Marquise | E | VS1 | Excellent
From $1,879
Compare at $16,240
Save 82.2%IGI | 6.5ct | Marquise | G | VS1 | Ideal
From $1,247
Compare at $7,020
Save 84.8%IGI | 6.5ct | Marquise | E | VVS2 | Ideal
From $2,492
Compare at $16,410
Save 75.5%IGI | 6.51ct | Marquise | G | VS1 | Very Good
From $1,429
Compare at $5,840
Save 75.5%IGI | 6.51ct | Marquise | G | VS1 | Very Good
From $1,429
Compare at $5,840
Save 78.3%IGI | 6.51ct | Marquise | F | VVS2 | Excellent
From $3,177
Compare at $14,660
IGI | 6.51ct | Marquise | G | VS1 | Excellent
From $3,099
Compare at $3,100
Save 84.6%IGI | 6.51ct | Marquise | E | VS1 | Ideal
From $2,513
Compare at $16,290
Save 80.2%IGI | 6.51ct | Marquise | G | VS1 | Ideal
From $1,483
Compare at $7,480
Save 80.6%IGI | 6.51ct | Marquise | E | VS2 | Ideal
From $2,496
Compare at $12,870
Save 80.7%IGI | 6.51ct | Marquise | F | VS1 | Excellent
From $1,777
Compare at $9,230
Save 86.8%IGI | 6.51ct | Marquise | F | VS1 | Excellent
From $1,777
Compare at $13,460
Save 72.7%IGI | 6.51ct | Marquise | D | VVS2 | Very Good
From $5,253
Compare at $19,240
Save 72%IGI | 6.51ct | Marquise | F | VS1 | Ideal
From $3,743
Compare at $13,390
Save 78.9%IGI | 6.52ct | Marquise | F | VS1 | Ideal
From $2,170
Compare at $10,280
Save 79.9%IGI | 6.52ct | Marquise | F | VS1 | Ideal
From $2,170
Compare at $10,790
Save 81.2%IGI | 6.52ct | Marquise | E | VVS2 | Excellent
From $3,096
Compare at $16,450
Save 87.6%IGI | 6.52ct | Marquise | E | VVS2 | Ideal
From $2,041
Compare at $16,420
Save 86.9%IGI | 6.52ct | Marquise | E | VS1 | Ideal
From $2,133
Compare at $16,320
Save 78.9%IGI | 6.52ct | Marquise | F | VS1 | Excellent
From $1,738
Compare at $8,220
Save 85%IGI | 6.52ct | Marquise | E | VVS2 | Very Good
From $2,459
Compare at $16,410
Save 86.2%IGI | 6.52ct | Marquise | F | VVS2 | Excellent
From $2,041
Compare at $14,800
Save 88.6%IGI | 6.52ct | Marquise | E | VS1 | Very Good
From $1,850
Compare at $16,290
Save 83.1%IGI | 6.52ct | Marquise | G | VVS2 | Very Good
From $2,211
Compare at $13,110
Save 86.4%IGI | 6.53ct | Marquise | F | VS1 | Very Good
From $1,838
Compare at $13,500
Save 88.4%IGI | 6.53ct | Marquise | E | VS1 | Excellent
From $1,887
Compare at $16,310
Save 80.8%IGI | 6.53ct | Marquise | F | VS1 | Ideal
From $2,174
Compare at $11,320
Save 87.3%IGI | 6.53ct | Marquise | F | VVS2 | Excellent
From $1,877
Compare at $14,790
Save 88.3%IGI | 6.53ct | Marquise | E | VVS2 | Excellent
From $1,930
Compare at $16,440
Save 59.1%IGI | 6.53ct | Marquise | F | VVS1 | Very Good
From $6,843
Compare at $16,720
Save 75.5%IGI | 6.54ct | Marquise | G | VS1 | Very Good
From $1,436
Compare at $5,860
Save 85.5%IGI | 6.54ct | Marquise | G | VVS2 | Ideal
From $1,899
Compare at $13,130
Save 41.9%IGI | 6.54ct | Marquise | F | VVS2 | Very Good
From $1,548
Compare at $2,667
Save 77.1%IGI | 6.54ct | Marquise | F | VS1 | Ideal
From $2,251
Compare at $9,830
IGI | 6.55ct | Marquise | FANCY | VS2 | Ideal
From $7,977
Compare at $10,594
Save 88.3%IGI | 6.55ct | Marquise | E | VVS2 | Excellent
From $1,936
Compare at $16,490
Save 53.3%IGI | 6.55ct | Marquise | F | VS2 | Ideal
From $1,294
Compare at $2,770
Save 85.8%IGI | 6.55ct | Marquise | F | VS1 | Ideal
From $1,921
Compare at $13,570
Save 73.1%IGI | 6.55ct | Marquise | F | VS1 | Very Good
From $2,617
Compare at $9,740
Save 49.7%IGI | 6.56ct | Marquise | F | VS1 | Ideal
From $1,826
Compare at $3,634
Save 88.4%IGI | 6.56ct | Marquise | E | VS1 | Excellent
From $1,896
Compare at $16,390
Save 75.9%IGI | 6.56ct | Marquise | E | VS1 | Ideal
From $1,584
Compare at $6,570
Save 47.3%IGI | 6.56ct | Marquise | E | VS1 | Very Good
From $2,693
Compare at $5,112
Save 87.3%IGI | 6.56ct | Marquise | F | VVS2 | Good
From $1,886
Compare at $14,860
Save 84.6%IGI | 6.56ct | Marquise | F | VVS2 | Very Good
From $2,290
Compare at $14,860
Save 76.2%IGI | 6.57ct | Marquise | F | VS1 | Very Good
From $1,555
Compare at $6,530
Save 65.5%IGI | 6.57ct | Marquise | E | VS1 | Excellent
From $2,536
Compare at $7,357
Save 80.6%IGI | 6.57ct | Marquise | F | VVS2 | Excellent
From $2,894
Compare at $14,920
Save 88.3%IGI | 6.57ct | Marquise | F | VS2 | Ideal
From $1,362
Compare at $11,590
Entry pricing in this category starts around $765.
What to Know When Shopping for 6.5 Carat Marquise Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $21,002 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 $3,523 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 59 comparable stones in this segment. Prices start around $765 and go up to $21,767.
Based on the latest market data, the average asking price is about $4,959 with a median around $3,523.
The observed spread is roughly $21,002 across tracked listings, which is about 96.5% 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 $3,523, 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 5 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 $21,002 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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