0.5 Carat Marquise Natural Diamond Prices Comparison
As of May 2026, 0.5 carat marquise natural diamonds usually range from $288 to $2,560, with an average price of $1,100.In the last month, prices for these diamonds are down 1.3%.Compare 3,692 verified listings across 9 retailers tracked by CaratRadar.
0.5 Carat Marquise Natural Diamond Market Overview
CaratRadar currently tracks 3,692 verified 0.5-carat marquise natural diamonds listed across 9 online retailers. Prices in this segment range from $288 to $2,560, with an average asking price of $1,100 and a median of $1,063.
The price spread of $2,272 (88.8% 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.
3,692 diamonds tracked in this segment
Price range: $288 to $2,560
Average price: $1,100
Median price: $1,063
Available across 9 retailers
Savings potential: up to 88.8%
Price Range Overview
As of May 29, 2026Real market range for this carat, shape, and diamond type.
3,692
$288
$1,100
$1,063
$2,560
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 21.6%GIA | 0.5ct | Marquise | L | VS1 | Very Good
From $291
Compare at $371
Save 20.9%GIA | 0.5ct | Marquise | L | SI2 | Excellent
From $292
Compare at $369
GIA | 0.52ct | Marquise | L | SI2 | Ideal
From $294
Compare at $316
Save 19.7%GIA | 0.5ct | Marquise | K | VS1 | Excellent
From $313
Compare at $390
Save 21.5%GIA | 0.5ct | Marquise | G | SI2 | Good
From $341
Compare at $435
Save 28%GIA | 0.5ct | Marquise | L | VS2 | Excellent
From $353
Compare at $490
Save 27.6%GIA | 0.54ct | Marquise | L | VS1 | Excellent
From $372
Compare at $514
Save 15.4%GIA | 0.5ct | Marquise | K | SI1 | Ideal
From $378
Compare at $447
Save 14.1%GIA | 0.5ct | Marquise | K | SI1 | Ideal
From $384
Compare at $447
IGI | 0.51ct | Marquise | J | SI1 | Very Good
From $385
Compare at $414
Save 27.8%GIA | 0.51ct | Marquise | L | VS1 | Ideal
From $397
Compare at $550
GIA | 0.5ct | Marquise | H | SI2 | Ideal
From $398
Compare at $420
IGI | 0.58ct | Marquise | K | VS2 | Very Good
From $405
Compare at $410
GIA | 0.5ct | Marquise | J | SI1 | Ideal
From $406
Compare at $437
IGI | 0.5ct | Marquise | K | VS2 | Very Good
From $410
Compare at $453
Save 27.1%GIA | 0.5ct | Marquise | K | VS1 | Very Good
From $412
Compare at $565
GIA | 0.52ct | Marquise | J | SI1 | Ideal
From $417
Compare at $449
GIA | 0.51ct | Marquise | H | SI2 | Ideal
From $417
Compare at $441
GIA | 0.51ct | Marquise | I | SI2 | Ideal
From $421
Compare at $453
Save 16.1%GIA | 0.59ct | Marquise | K | SI1 | Ideal
From $426
Compare at $508
Save 15.8%GIA | 0.5ct | Marquise | K | SI2 | Excellent
From $433
Compare at $514
GIA | 0.5ct | Marquise | G | SI2 | Very Good
From $435
Compare at $473
Save 16.5%GIA | 0.5ct | Marquise | K | VS2 | Ideal
From $439
Compare at $526
Save 18.5%GIA | 0.53ct | Marquise | K | SI1 | Excellent
From $441
Compare at $541
Save 12%IGI | 0.5ct | Marquise | J | VVS1 | Very Good
From $441
Compare at $501
Save 11.2%IGI | 0.51ct | Marquise | J | SI1 | Very Good
From $445
Compare at $501
Save 21.3%GIA | 0.5ct | Marquise | K | VVS2 | Ideal
From $446
Compare at $567
Save 27.9%GIA | 0.5ct | Marquise | J | SI1 | Good
From $454
Compare at $630
Save 17.3%IGI | 0.52ct | Marquise | J | VS2 | Very Good
From $455
Compare at $550
Save 17.3%IGI | 0.52ct | Marquise | J | VS2 | Very Good
From $455
Compare at $550
Save 18%IGI | 0.5ct | Marquise | J | SI1 | Very Good
From $455
Compare at $555
GIA | 0.5ct | Marquise | E | SI2 | Ideal
From $456
Compare at $480
Save 23.5%GIA | 0.5ct | Marquise | K | VS2 | Excellent
From $457
Compare at $597
Save 38.8%GIA | 0.51ct | Marquise | J | SI1 | Very Good
From $457
Compare at $747
Save 30.4%GIA | 0.5ct | Marquise | K | VS2 | Excellent
From $458
Compare at $658
GIA | 0.51ct | Marquise | L | SI1 | Ideal
From $459
Compare at $485
Save 17.5%GIA | 0.53ct | Marquise | J | SI1 | Excellent
From $462
Compare at $560
Save 15.3%IGI | 0.5ct | Marquise | J | VS1 | Very Good
From $465
Compare at $549
Save 15.3%IGI | 0.5ct | Marquise | J | VS1 | Very Good
From $465
Compare at $549
Save 12.1%IGI | 0.5ct | Marquise | J | VS2 | Very Good
From $465
Compare at $529
GIA | 0.51ct | Marquise | H | SI2 | Ideal
From $467
Compare at $503
Save 27.5%GIA | 0.5ct | Marquise | K | SI1 | Excellent
From $472
Compare at $651
Save 16.3%IGI | 0.52ct | Marquise | J | SI1 | Very Good
From $473
Compare at $565
GIA | 0.5ct | Marquise | K | VS1 | Ideal
From $475
Compare at $523
Save 24.2%GIA | 0.5ct | Marquise | K | SI1 | Excellent
From $475
Compare at $627
Save 38.9%GIA | 0.51ct | Marquise | H | SI2 | Excellent
From $476
Compare at $779
GIA | 0.51ct | Marquise | F | SI2 | Ideal
From $480
Compare at $508
Save 19.6%GIA | 0.59ct | Marquise | I | SI2 | Very Good
From $480
Compare at $597
Save 19.9%GIA | 0.59ct | Marquise | K | SI1 | Ideal
From $480
Compare at $599
GIA | 0.51ct | Marquise | F | SI2 | Ideal
From $480
Compare at $508
Entry pricing in this category starts around $288.
What to Know When Shopping for 0.5 Carat Marquise Natural Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $2,272 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 $1,063 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 3,692 comparable stones in this segment. Prices start around $288 and go up to $2,560.
Based on the latest market data, the average asking price is about $1,100 with a median around $1,063.
The observed spread is roughly $2,272 across tracked listings, which is about 88.8% from highest to lowest offer in this bucket.
We refresh pricing data daily so these pages stay current with market changes.
Based on completed market data, the fair market benchmark is $1,100. The median price is $1,063, 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 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 $2,272 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 Natural inventory for 0.5 carat Marquise diamonds.