6.5 Carat Marquise Lab Grown Diamond Prices Comparison
As of February 2026, 6.5 carat marquise lab grown diamonds usually range from $1,260 to $9,158, with an average price of $2,107.In the last month, prices for these diamonds are down 3.1%.Compare 43 verified listings across 5 retailers tracked by CaratRadar.
6.5 Carat Marquise Lab Grown Diamond Market Overview
CaratRadar currently tracks 43 verified 6.5-carat marquise lab grown diamonds listed across 5 online retailers. Prices in this segment range from $1,260 to $9,158, with an average asking price of $2,107 and a median of $1,662.
The price spread of $7,898 (86.2% 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.
43 diamonds tracked in this segment
Price range: $1,260 to $9,158
Average price: $2,107
Median price: $1,662
Available across 5 retailers
Savings potential: up to 86.2%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
43
$1,260
$2,107
$1,662
$9,158
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 87%6.47ct | Marquise | F | VS1 | Excellent
From $1,737
Compare at $13,310
IGISave 59.8%6.48ct | Marquise | F | VS1 | Excellent
From $5,380
Compare at $13,380
IGISave 88.9%6.48ct | Marquise | E | VS1 | Excellent
From $1,799
Compare at $16,220
IGISave 84.3%6.49ct | Marquise | D | VVS2 | Excellent
From $2,997
Compare at $19,140
IGISave 88.5%6.49ct | Marquise | E | VVS2 | Very Good
From $1,873
Compare at $16,260
IGISave 91%6.5ct | Marquise | E | VS1 | Excellent
From $1,583
Compare at $17,580
IGISave 88.6%6.5ct | Marquise | E | VVS2 | Ideal
From $1,860
Compare at $16,280
IGISave 91.4%6.5ct | Marquise | E | VVS2 | Excellent
From $1,578
Compare at $18,440
IGISave 72.9%6.5ct | Marquise | E | VS1 | Ideal
From $1,513
Compare at $5,590
IGISave 76.2%6.51ct | Marquise | G | VS1 | Very Good
From $1,599
Compare at $6,710
IGISave 78.3%6.51ct | Marquise | F | VVS2 | Excellent
From $3,177
Compare at $14,660
IGISave 89%6.51ct | Marquise | E | VVS2 | Excellent
From $1,806
Compare at $16,400
IGISave 76.2%6.51ct | Marquise | G | VS1 | Very Good
From $1,599
Compare at $6,710
IGISave 83.5%6.51ct | Marquise | E | VS1 | Ideal
From $2,690
Compare at $16,290
IGISave 86.7%6.51ct | Marquise | E | VS2 | Ideal
From $1,706
Compare at $12,870
IGISave 90.9%6.51ct | Marquise | F | VS1 | Excellent
From $1,445
Compare at $15,960
IGISave 89%6.51ct | Marquise | E | VVS2 | Excellent
From $1,797
Compare at $16,360
IGISave 52.4%6.51ct | Marquise | D | VVS2 | Very Good
From $9,158
Compare at $19,240
IGISave 89.8%6.51ct | Marquise | E | VVS2 | Excellent
From $1,662
Compare at $16,360
IGISave 89%6.51ct | Marquise | E | VVS2 | Excellent
From $1,797
Compare at $16,360
IGISave 48.9%6.51ct | Marquise | G | VS1 | Excellent
From $3,004
Compare at $5,879
IGISave 72.4%6.51ct | Marquise | F | VS2 | Ideal
From $1,309
Compare at $4,750
IGISave 91.2%6.51ct | Marquise | F | VS1 | Excellent
From $1,415
Compare at $16,010
IGISave 87.9%6.52ct | Marquise | E | VVS2 | Ideal
From $1,986
Compare at $16,380
IGISave 89%6.52ct | Marquise | F | VVS2 | Excellent
From $1,626
Compare at $14,740
IGISave 91%6.52ct | Marquise | E | VVS2 | Very Good
From $1,612
Compare at $17,980
IGISave 76.4%6.52ct | Marquise | E | VVS2 | Very Good
From $3,873
Compare at $16,410
IGISave 83%6.52ct | Marquise | G | VVS2 | Very Good
From $2,211
Compare at $13,010
IGISave 88%6.52ct | Marquise | E | VS1 | Very Good
From $1,949
Compare at $16,290
IGISave 17.4%6.52ct | Marquise | F | VS1 | Very Good
From $1,557
Compare at $1,885
IGISave 84.8%6.52ct | Marquise | E | VVS2 | Excellent
From $2,496
Compare at $16,460
IGISave 90.4%6.52ct | Marquise | E | VS1 | Ideal
From $1,551
Compare at $16,210
IGISave 83.5%6.52ct | Marquise | F | VS1 | Excellent
From $1,441
Compare at $8,720
IGISave 87%6.53ct | Marquise | F | VS1 | Very Good
From $1,751
Compare at $13,430
IGISave 91%6.53ct | Marquise | F | VVS2 | Excellent
From $1,482
Compare at $16,400
IGISave 91.2%6.53ct | Marquise | E | VVS2 | Excellent
From $1,585
Compare at $18,010
IGISave 17.2%6.53ct | Marquise | F | VS1 | Very Good
From $1,535
Compare at $1,853
IGISave 91%6.53ct | Marquise | E | VS1 | Excellent
From $1,589
Compare at $17,660
IGISave 88.9%6.54ct | Marquise | G | VVS2 | Ideal
From $1,450
Compare at $13,120
IGISave 77.1%6.54ct | Marquise | F | VS1 | Ideal
From $2,251
Compare at $9,830
IGISave 72.4%6.54ct | Marquise | F | VS2 | Ideal
From $1,315
Compare at $4,770
IGISave 76.2%6.54ct | Marquise | G | VS1 | Very Good
From $1,607
Compare at $6,740
IGISave 61.6%6.54ct | Marquise | F | VVS2 | Very Good
From $1,260
Compare at $3,279
Entry pricing in this category starts around $1,260.
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 $7,898 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 $1,662 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 43 comparable stones in this segment. Prices start around $1,260 and go up to $9,158.
Based on the latest market data, the average asking price is about $2,107 with a median around $1,662.
The observed spread is roughly $7,898 across tracked listings, which is about 86.2% 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 $1,662, 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 $7,898 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 6.5 carat Marquise diamonds.