1.2 Carat Marquise Lab Grown Diamond Prices Comparison
As of February 2026, 1.2 carat marquise lab grown diamonds usually range from $375 to $4,230, with an average price of $675.In the last month, prices for these diamonds are down 1%.Compare 655 verified listings across 9 retailers tracked by CaratRadar.
1.2 Carat Marquise Lab Grown Diamond Market Overview
CaratRadar currently tracks 655 verified 1.2-carat marquise lab grown diamonds listed across 9 online retailers. Prices in this segment range from $375 to $4,230, with an average asking price of $675 and a median of $582.
The price spread of $3,855 (91.1% 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.
655 diamonds tracked in this segment
Price range: $375 to $4,230
Average price: $675
Median price: $582
Available across 9 retailers
Savings potential: up to 91.1%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
655
$375
$675
$582
$4,230
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 64.6%1.15ct | Marquise | D | VVS2 | Ideal
From $605
Compare at $1,710
IGISave 59.6%1.15ct | Marquise | D | VVS2 | Excellent
From $517
Compare at $1,280
IGISave 55.6%1.15ct | Marquise | D | VVS2 | Very Good
From $626
Compare at $1,410
IGISave 67.1%1.15ct | Marquise | D | VVS2 | Ideal
From $572
Compare at $1,740
IGISave 73.6%1.15ct | Marquise | E | VVS2 | Excellent
From $633
Compare at $2,400
IGISave 73.4%1.15ct | Marquise | D | VVS2 | Ideal
From $691
Compare at $2,600
IGISave 63.8%1.15ct | Marquise | E | VVS1 | Ideal
From $691
Compare at $1,910
IGISave 57.8%1.15ct | Marquise | E | VVS2 | Ideal
From $633
Compare at $1,500
IGISave 73.6%1.15ct | Marquise | E | VVS2 | Excellent
From $633
Compare at $2,400
IGISave 78.2%1.15ct | Marquise | D | VS1 | Excellent
From $534
Compare at $2,450
IGISave 77%1.15ct | Marquise | D | IF | Ideal
From $765
Compare at $3,330
IGISave 60.1%1.15ct | Marquise | E | VVS2 | Ideal
From $507
Compare at $1,270
IGISave 22.9%1.15ct | Marquise | D | VVS2 | Excellent
From $691
Compare at $896
IGISave 15.5%1.15ct | Marquise | E | VS2 | Very Good
From $427
Compare at $506
IGISave 61.9%1.15ct | Marquise | E | VVS2 | Ideal
From $442
Compare at $1,160
IGISave 67.6%1.15ct | Marquise | E | VVS2 | Very Good
From $493
Compare at $1,520
IGISave 43.8%1.15ct | Marquise | D | VS1 | Ideal
From $641
Compare at $1,140
IGISave 66.5%1.15ct | Marquise | D | VVS2 | Ideal
From $573
Compare at $1,710
IGISave 66.1%1.15ct | Marquise | F | VS2 | Ideal
From $1,401
Compare at $4,136
IGISave 79.1%1.15ct | Marquise | F | VS1 | Ideal
From $474
Compare at $2,269
IGISave 73.4%1.15ct | Marquise | D | VVS2 | Excellent
From $691
Compare at $2,600
IGISave 60.8%1.15ct | Marquise | D | IF | Ideal
From $663
Compare at $1,691
IGISave 60.7%1.15ct | Marquise | FANCY | VVS2 | Ideal
From $1,618
Compare at $4,120
IGISave 73.4%1.15ct | Marquise | D | VVS2 | Excellent
From $691
Compare at $2,600
IGISave 69.4%1.15ct | Marquise | D | VVS1 | Excellent
From $915
Compare at $2,990
IGISave 73.4%1.15ct | Marquise | D | VVS2 | Excellent
From $691
Compare at $2,600
IGISave 75.3%1.15ct | Marquise | E | VVS1 | Ideal
From $496
Compare at $2,010
IGISave 67.6%1.15ct | Marquise | D | VS1 | Excellent
From $464
Compare at $1,430
IGISave 31.4%1.15ct | Marquise | E | VS1 | Excellent
From $533
Compare at $778
IGISave 64%1.15ct | Marquise | D | VVS2 | Excellent
From $626
Compare at $1,740
IGISave 56%1.15ct | Marquise | D | VS1 | Very Good
From $629
Compare at $1,430
IGISave 56.7%1.15ct | Marquise | E | VS1 | Very Good
From $593
Compare at $1,370
IGISave 64.6%1.15ct | Marquise | E | VS1 | Excellent
From $485
Compare at $1,370
IGISave 60.9%1.15ct | Marquise | E | VVS2 | Very Good
From $507
Compare at $1,295
1.15ct | Marquise | D | VVS2 | Very Good
From $536
Compare at $1,740
IGISave 73.6%1.15ct | Marquise | E | VVS2 | Excellent
From $633
Compare at $2,400
IGISave 75.3%1.15ct | Marquise | E | VVS1 | Ideal
From $496
Compare at $2,010
IGISave 73.4%1.15ct | Marquise | D | VVS2 | Excellent
From $691
Compare at $2,600
IGISave 66.9%1.15ct | Marquise | D | VVS2 | Ideal
From $576
Compare at $1,740
IGISave 62.3%1.15ct | Marquise | D | VVS2 | Ideal
From $576
Compare at $1,530
IGISave 55.6%1.15ct | Marquise | D | VVS2 | Excellent
From $626
Compare at $1,410
IGISave 58.5%1.15ct | Marquise | F | VVS1 | Very Good
From $648
Compare at $1,560
IGISave 73.6%1.15ct | Marquise | E | VVS2 | Excellent
From $633
Compare at $2,400
IGISave 59.8%1.15ct | Marquise | D | VVS1 | Excellent
From $859
Compare at $2,135
IGISave 43.7%1.15ct | Marquise | D | VVS1 | Excellent
From $859
Compare at $1,527
IGISave 66.2%1.15ct | Marquise | E | VVS2 | Very Good
From $507
Compare at $1,500
IGISave 61.9%1.15ct | Marquise | F | VVS2 | Ideal
From $529
Compare at $1,390
1.15ct | Marquise | D | VVS2 | Ideal
From $554
Compare at $1,710
IGISave 60.8%1.15ct | Marquise | E | VVS2 | Very Good
From $511
Compare at $1,304
IGISave 73.4%1.15ct | Marquise | D | VVS2 | Excellent
From $691
Compare at $2,600
Entry pricing in this category starts around $375.
What to Know When Shopping for 1.2 Carat Marquise Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $3,855 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 $582 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 655 comparable stones in this segment. Prices start around $375 and go up to $4,230.
Based on the latest market data, the average asking price is about $675 with a median around $582.
The observed spread is roughly $3,855 across tracked listings, which is about 91.1% 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 $582, 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 9 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 $3,855 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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