1.5 Carat Marquise Natural Diamond Prices Comparison
As of October 2026, 1.5 carat marquise natural diamonds in the 1.50–1.74 carat benchmark range usually range from $867 to $42,428, with an average price of $10,535.In the last month, prices for these diamonds are down 1.3%.Compare 1,240 verified listings across 12 retailers tracked by CaratRadar.
1.5 Carat Marquise Natural Diamond Market Overview
CaratRadar currently tracks 1,240 verified 1.5-carat marquise natural diamonds in the 1.50–1.74 carat benchmark range, listed across 12 online retailers. Prices in this segment range from $867 to $42,428, with an average asking price of $10,535 and a median of $10,170.
The price spread of $41,560 (98.0% 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 use the same benchmark range throughout the page and 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.
1,240 diamonds tracked in the 1.50–1.74 carat benchmark
Price range: $867 to $42,428
Average price: $10,535
Median price: $10,170
Available across 12 retailers
Savings potential: up to 98.0%
Price Range Overview
As of Oct 13, 2026Real market range for this carat, shape, and diamond type.
1,240
$867
$10,535
$10,170
$42,428
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers in the same benchmark range and open any listing for full details.
Save 13.2%IGI | 1.53ct | Marquise | K | I1 | Ideal
From $1,695
Compare at $1,952
IGI | 1.5ct | Marquise | L | SI2 | Excellent
From $1,749
Save 38.2%GIA | 1.5ct | Marquise | L | SI2 | Excellent
From $1,821
Compare at $2,948
IGI | 1.5ct | Marquise | L | SI2 | Very Good
From $1,940
Compare at $1,957
Save 37.5%GIA | 1.5ct | Marquise | L | SI2 | Excellent
From $2,120
Compare at $3,393
Save 36.3%GIA | 1.51ct | Marquise | L | SI2 | Excellent
From $2,169
Compare at $3,403
Save 20.1%IGI | 1.52ct | Marquise | K | SI1 | Very Good
From $2,211
Compare at $2,769
Save 14.2%IGI | 1.5ct | Marquise | K | SI2 | Ideal
From $2,224
Compare at $2,592
Save 20.1%IGI | 1.56ct | Marquise | K | SI1 | Very Good
From $2,269
Compare at $2,841
Save 41.8%HRD | 1.51ct | Marquise | H | SI2 | Ideal
From $2,274
Compare at $3,909
Save 14.2%IGI | 1.51ct | Marquise | L | SI2 | Ideal
From $2,284
Compare at $2,661
Save 15.1%IGI | 1.51ct | Marquise | J | I1 | Very Good
From $2,318
Compare at $2,729
Save 18.7%IGI | 1.51ct | Marquise | J | SI2 | Ideal
From $2,318
Compare at $2,850
Save 22.3%IGI | 1.51ct | Marquise | G | I1 | Very Good
From $2,332
Compare at $3,003
IGI | 1.51ct | Marquise | I | SI2 | Excellent
From $2,336
Compare at $2,376
IGI | 1.51ct | Marquise | J | SI2 | Ideal
From $2,389
Compare at $2,430
IGI | 1.51ct | Marquise | H | SI2 | Ideal
From $2,400
Compare at $2,442
Save 20.9%IGI | 1.5ct | Marquise | K | SI1 | Very Good
From $2,402
Compare at $3,036
Save 18.2%IGI | 1.51ct | Marquise | F | I1 | Ideal
From $2,406
Compare at $2,942
IGI | 1.51ct | Marquise | I | SI2 | Very Good
From $2,427
Compare at $2,469
IGI | 1.5ct | Marquise | H | I1 | Very Good
From $2,439
Compare at $2,598
IGI | 1.51ct | Marquise | J | SI2 | Very Good
From $2,441
Compare at $2,484
Save 35.5%GIA | 1.51ct | Marquise | L | SI2 | Very Good
From $2,496
Compare at $3,869
IGI | 1.5ct | Marquise | I | SI2 | Very Good
From $2,523
Compare at $2,567
IGI | 1.51ct | Marquise | I | SI2 | Very Good
From $2,533
Compare at $2,578
IGI | 1.51ct | Marquise | J | SI2 | Very Good
From $2,552
Compare at $2,596
IGI | 1.51ct | Marquise | H | SI2 | Very Good
From $2,561
Compare at $2,785
Save 36.8%GIA | 1.5ct | Marquise | L | SI2 | Very Good
From $2,566
Compare at $4,059
Save 16.9%HRD | 1.51ct | Marquise | H | SI2 | Ideal
From $2,575
Compare at $3,100
IGI | 1.51ct | Marquise | J | SI1 | Excellent
From $2,575
Compare at $2,800
IGI | 1.5ct | Marquise | J | SI2 | Ideal
From $2,582
Compare at $2,627
IGI | 1.52ct | Marquise | K | SI2 | Very Good
From $2,588
Compare at $2,633
IGI | 1.51ct | Marquise | K | SI2 | Ideal
From $2,598
Compare at $2,773
Save 43%HRD | 1.51ct | Marquise | H | SI2 | Ideal
From $2,608
Compare at $4,574
Save 10.7%IGI | 1.51ct | Marquise | K | SI1 | Excellent
From $2,617
Compare at $2,930
Save 41.3%GIA | 1.52ct | Marquise | L | SI1 | Ideal
From $2,623
Compare at $4,469
IGI | 1.51ct | Marquise | I | SI2 | Very Good
From $2,650
Compare at $2,696
IGI | 1.7ct | Marquise | K | SI2 | Good
From $2,662
Compare at $2,869
Save 35.5%GIA | 1.51ct | Marquise | L | SI2 | Very Good
From $2,674
Compare at $4,146
IGI | 1.51ct | Marquise | J | SI2 | Very Good
From $2,685
Compare at $2,894
IGI | 1.5ct | Marquise | H | SI2 | Very Good
From $2,691
Compare at $2,738
Save 24%IGI | 1.5ct | Marquise | D | I1 | Ideal
From $2,692
Compare at $3,544
IGI | 1.5ct | Marquise | H | I1 | Ideal
From $2,698
Compare at $2,856
IGI | 1.52ct | Marquise | H | SI2 | Ideal
From $2,703
Compare at $2,750
IGI | 1.51ct | Marquise | H | SI2 | Ideal
From $2,715
Compare at $2,763
Save 41.9%GIA | 1.5ct | Marquise | K | SI2 | Good
From $2,718
Compare at $4,677
IGI | 1.5ct | Marquise | I | SI2 | Ideal
From $2,728
Compare at $2,775
Save 41.9%GIA | 1.5ct | Marquise | K | SI2 | Very Good
From $2,732
Compare at $4,701
Save 36.8%GIA | 1.71ct | Marquise | L | SI2 | Excellent
From $2,738
Compare at $4,333
Save 35.5%GIA | 1.5ct | Marquise | L | SI1 | Excellent
From $2,749
Compare at $4,263
Entry pricing in this benchmark range starts around $867.
What to Know When Shopping for 1.5 Carat Marquise Natural Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $41,560 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 $10,170 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.
- Compare natural vs. lab-grown options for the same carat and shape. Lab-grown diamonds are chemically identical but often 30-50% less expensive.
- 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 1,240 comparable stones in the 1.50–1.74 carat benchmark range. Prices start around $867 and go up to $42,428.
Based on the latest market data, the average asking price is about $10,535 with a median around $10,170.
The observed spread is roughly $41,560 across tracked listings, which is about 98.0% from highest to lowest offer in the 1.50–1.74 carat benchmark range.
We refresh pricing data daily so these pages stay current with market changes.
Based on completed market data, the fair market benchmark is $10,535. The median price is $10,170, 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 12 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 $41,560 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.
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Tracking Natural inventory for the 1.50–1.74 carat Marquise diamond benchmark.