0.3 Carat Marquise Natural Diamond Prices Comparison
As of May 2026, 0.3 carat marquise natural diamonds usually range from $249 to $3,541, with an average price of $533.In the last month, prices for these diamonds are down 2%.Compare 2,408 verified listings across 8 retailers tracked by CaratRadar.
0.3 Carat Marquise Natural Diamond Market Overview
CaratRadar currently tracks 2,408 verified 0.3-carat marquise natural diamonds listed across 8 online retailers. Prices in this segment range from $249 to $3,541, with an average asking price of $533 and a median of $517.
The price spread of $3,292 (93.0% 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 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.
2,408 diamonds tracked in this segment
Price range: $249 to $3,541
Average price: $533
Median price: $517
Available across 8 retailers
Savings potential: up to 93.0%
Price Range Overview
As of May 29, 2026Real market range for this carat, shape, and diamond type.
2,408
$249
$533
$517
$3,541
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 16.1%GIA | 0.3ct | Marquise | L | SI1 | Ideal
From $194
Compare at $231
Save 24.2%GIA | 0.3ct | Marquise | L | VS1 | Ideal
From $204
Compare at $269
GIA | 0.3ct | Marquise | H | SI2 | Ideal
From $234
Compare at $252
Save 52.3%GIA | 0.3ct | Marquise | J | VS2 | Very Good
From $245
Compare at $514
Save 24.8%GIA | 0.3ct | Marquise | K | VS2 | Excellent
From $247
Compare at $328
Save 16.2%GIA | 0.31ct | Marquise | K | SI1 | Ideal
From $259
Compare at $309
Save 52.6%GIA | 0.31ct | Marquise | K | VVS2 | Ideal
From $264
Compare at $557
GIA | 0.4ct | Marquise | L | SI1 | Excellent
From $277
Compare at $300
Save 18.8%GIA | 0.3ct | Marquise | F | SI1 | Very Good
From $277
Compare at $341
Save 23.5%GIA | 0.3ct | Marquise | K | VS2 | Excellent
From $284
Compare at $371
Save 27.2%GIA | 0.3ct | Marquise | K | VS2 | Excellent
From $284
Compare at $390
Save 21.1%GIA | 0.3ct | Marquise | J | VVS1 | Ideal
From $285
Compare at $361
Save 23.3%GIA | 0.4ct | Marquise | K | VS2 | Good
From $299
Compare at $390
Save 40.8%GIA | 0.3ct | Marquise | J | VVS1 | Excellent
From $299
Compare at $505
Save 17.6%GIA | 0.3ct | Marquise | F | SI1 | Very Good
From $300
Compare at $364
Save 29.3%GIA | 0.4ct | Marquise | I | SI1 | Ideal
From $300
Compare at $425
Save 17.8%GIA | 0.3ct | Marquise | E | SI1 | Very Good
From $304
Compare at $370
Save 12.1%IGI | 0.37ct | Marquise | J | VS2 | Very Good
From $305
Compare at $347
GIA | 0.31ct | Marquise | F | SI1 | Ideal
From $306
Compare at $331
Save 41.3%GIA | 0.3ct | Marquise | I | VS2 | Excellent
From $307
Compare at $523
GIA | 0.32ct | Marquise | E | SI2 | Excellent
From $307
Compare at $331
Save 17.4%GIA | 0.31ct | Marquise | F | SI1 | Very Good
From $309
Compare at $374
GIA | 0.3ct | Marquise | F | SI2 | Ideal
From $314
Compare at $339
GIA | 0.3ct | Marquise | G | SI1 | Excellent
From $318
Compare at $347
Save 15.8%GIA | 0.3ct | Marquise | G | SI2 | Very Good
From $319
Compare at $379
Save 12.2%IGI | 0.35ct | Marquise | J | VS1 | Very Good
From $320
Compare at $364
GIA | 0.31ct | Marquise | G | SI1 | Excellent
From $321
Compare at $349
Save 19.7%GIA | 0.4ct | Marquise | L | VS2 | Very Good
From $321
Compare at $400
Save 16.4%GIA | 0.3ct | Marquise | E | SI1 | Very Good
From $322
Compare at $385
GIA | 0.3ct | Marquise | E | SI1 | Ideal
From $323
Compare at $354
GIA | 0.33ct | Marquise | L | IF | Ideal
From $324
Compare at $340
GIA | 0.3ct | Marquise | F | SI1 | Excellent
From $325
Compare at $356
Save 42.3%GIA | 0.32ct | Marquise | G | SI2 | Excellent
From $326
Compare at $565
GIA | 0.31ct | Marquise | G | SI2 | Good
From $326
Compare at $352
GIA | 0.3ct | Marquise | K | IF | Ideal
From $327
Compare at $340
GIA | 0.3ct | Marquise | F | SI1 | Excellent
From $329
Compare at $362
GIA | 0.3ct | Marquise | D | SI2 | Ideal
From $329
Compare at $356
Save 42.6%GIA | 0.35ct | Marquise | J | VS1 | Good
From $330
Compare at $575
GIA | 0.3ct | Marquise | E | SI2 | Ideal
From $330
Compare at $350
Save 16%GIA | 0.3ct | Marquise | E | SI1 | Very Good
From $330
Compare at $393
GIA | 0.34ct | Marquise | K | IF | Ideal
From $331
Compare at $352
Save 42.6%GIA | 0.31ct | Marquise | D | SI2 | Ideal
From $331
Compare at $577
GIA | 0.31ct | Marquise | G | SI1 | Very Good
From $332
Compare at $368
GIA | 0.35ct | Marquise | I | VS2 | Ideal
From $332
Compare at $366
GIA | 0.33ct | Marquise | F | SI1 | Excellent
From $333
Compare at $370
Save 15.3%GIA | 0.33ct | Marquise | G | SI2 | Excellent
From $335
Compare at $396
GIA | 0.3ct | Marquise | D | SI2 | Ideal
From $336
Compare at $362
Save 15.8%GIA | 0.3ct | Marquise | E | SI1 | Very Good
From $336
Compare at $399
GIA | 0.36ct | Marquise | K | VVS1 | Excellent
From $337
Compare at $362
GIA | 0.3ct | Marquise | G | SI1 | Ideal
From $337
Compare at $374
Entry pricing in this category starts around $249.
What to Know When Shopping for 0.3 Carat Marquise Natural Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $3,292 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 $517 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 2,408 comparable stones in this segment. Prices start around $249 and go up to $3,541.
Based on the latest market data, the average asking price is about $533 with a median around $517.
The observed spread is roughly $3,292 across tracked listings, which is about 93.0% 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 $533. The median price is $517, 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 8 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 $3,292 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 0.3 carat Marquise diamonds.