11.5 Carat Marquise Lab Grown Diamond Prices Comparison
As of March 2026, 11.5 carat marquise lab grown diamonds usually range from $1,985 to $25,990, with an average price of $7,182.In the last month, prices for these diamonds are up 7.4%.Compare 10 verified listings across 6 retailers tracked by CaratRadar.
11.5 Carat Marquise Lab Grown Diamond Market Overview
CaratRadar currently tracks 10 verified 11.5-carat marquise lab grown diamonds listed across 6 online retailers. Prices in this segment range from $1,985 to $25,990, with an average asking price of $7,182 and a median of $5,508.
The price spread of $24,005 (92.4% 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.
10 diamonds tracked in this segment
Price range: $1,985 to $25,990
Average price: $7,182
Median price: $5,508
Available across 6 retailers
Savings potential: up to 92.4%
Price Range Overview
As of Mar 1, 2026Real market range for this carat, shape, and diamond type.
10
$1,985
$7,182
$5,509
$25,990
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 65.7%11.45ct | Marquise | E | VVS2 | Excellent
From $5,504
Compare at $16,030
IGISave 75.2%11.46ct | Marquise | F | VS1 | Ideal
From $5,879
Compare at $23,680
IGISave 65.7%11.47ct | Marquise | E | VVS2 | Excellent
From $5,513
Compare at $16,055
IGISave 65.7%11.48ct | Marquise | E | VVS2 | Excellent
From $5,518
Compare at $16,070
IGISave 87.9%11.48ct | Marquise | F | VVS2 | Ideal
From $3,141
Compare at $25,980
IGISave 50.8%11.49ct | Marquise | F | VS1 | Ideal
From $11,630
Compare at $23,630
IGISave 71.2%11.52ct | Marquise | F | VVS2 | Ideal
From $4,186
Compare at $14,515
IGISave 91.4%11.53ct | Marquise | G | VVS2 | Ideal
From $1,985
Compare at $23,130
IGI11.54ct | Marquise | F | VVS2 | Ideal
From $25,990
Compare at $27,320
IGISave 90.6%11.55ct | Marquise | F | VVS2 | Ideal
From $2,471
Compare at $26,170
Entry pricing in this category starts around $1,985.
What to Know When Shopping for 11.5 Carat Marquise Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $24,005 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 $5,508 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 10 comparable stones in this segment. Prices start around $1,985 and go up to $25,990.
Based on the latest market data, the average asking price is about $7,182 with a median around $5,508.
The observed spread is roughly $24,005 across tracked listings, which is about 92.4% 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 $5,508, 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 6 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 $24,005 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.
11.4 Carat Marquise Lab Grown Diamond Prices
11.6 Carat Marquise Lab Grown Diamond Prices
11.3 Carat Marquise Lab Grown Diamond Prices
11.7 Carat Marquise Lab Grown Diamond Prices
11.2 Carat Marquise Lab Grown Diamond Prices
11.1 Carat Marquise Lab Grown Diamond Prices
11 Carat Marquise Lab Grown Diamond Prices
11.5 Carat Emerald Lab Grown Diamond Prices
11.5 Carat Round Lab Grown Diamond Prices
11.5 Carat Oval Lab Grown Diamond Prices
11.5 Carat Radiant Lab Grown Diamond Prices
11.5 Carat Cushion Lab Grown Diamond Prices
Tracking Lab Grown inventory for 11.5 carat Marquise diamonds.