0.3 Carat Marquise Natural Diamond Prices Comparison
As of February 2026, 0.3 carat marquise natural diamonds usually range from $320 to $1,070, with an average price of $556.In the last month, prices for these diamonds are down 2.9%.Compare 358 verified listings across 3 retailers tracked by CaratRadar.
0.3 Carat Marquise Natural Diamond Market Overview
CaratRadar currently tracks 358 verified 0.3-carat marquise natural diamonds listed across 3 online retailers. Prices in this segment range from $320 to $1,070, with an average asking price of $556 and a median of $550.
The price spread of $750 (70.1% 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.
358 diamonds tracked in this segment
Price range: $320 to $1,070
Average price: $556
Median price: $550
Available across 3 retailers
Savings potential: up to 70.1%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
358
$320
$556
$550
$1,070
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
GIA0.3ct | Marquise | G | VS1 | Ideal
From $477
Compare at $530
GIASave 22.9%0.3ct | Marquise | F | VVS2 | Very Good
From $586
Compare at $760
GIA0.3ct | Marquise | G | SI1 | Very Good
From $460
Compare at $482
GIA0.3ct | Marquise | H | SI1 | Very Good
From $390
Compare at $393
GIASave 12.8%0.3ct | Marquise | H | VS1 | Very Good
From $490
Compare at $562
GIA0.3ct | Marquise | G | SI1 | Very Good
From $355
Compare at $370
GIASave 22.6%0.3ct | Marquise | F | VVS2 | Ideal
From $596
Compare at $770
GIASave 27.8%0.3ct | Marquise | G | VS1 | Excellent
From $491
Compare at $680
GIASave 24.8%0.3ct | Marquise | E | VS1 | Excellent
From $556
Compare at $740
GIA0.3ct | Marquise | F | SI1 | Excellent
From $380
Compare at $420
GIASave 13.9%0.3ct | Marquise | F | VVS2 | Excellent
From $490
Compare at $569
GIA0.3ct | Marquise | G | VS1 | Very Good
From $480
Compare at $483
GIA0.3ct | Marquise | E | VS1 | Very Good
From $470
Compare at $520
GIASave 18.6%0.3ct | Marquise | F | IF | Ideal
From $725
Compare at $890
GIASave 20.1%0.3ct | Marquise | G | VVS1 | Excellent
From $639
Compare at $800
GIA0.3ct | Marquise | E | SI1 | Ideal
From $430
Compare at $437
GIASave 22.1%0.3ct | Marquise | E | VVS1 | Excellent
From $647
Compare at $830
GIA0.3ct | Marquise | F | SI2 | Ideal
From $400
Compare at $415
GIASave 22%0.3ct | Marquise | E | VS1 | Excellent
From $601
Compare at $770
GIA0.3ct | Marquise | D | VVS1 | Ideal
From $690
Compare at $741
GIA0.3ct | Marquise | H | VVS1 | Ideal
From $476
Compare at $490
GIA0.3ct | Marquise | E | SI1 | Very Good
From $430
Compare at $441
GIASave 26.9%0.3ct | Marquise | E | VS1 | Excellent
From $512
Compare at $700
GIASave 24.5%0.3ct | Marquise | E | VS1 | Good
From $566
Compare at $750
GIASave 15.1%0.3ct | Marquise | F | VS2 | Ideal
From $484
Compare at $570
GIASave 27.1%0.3ct | Marquise | I | VVS1 | Excellent
From $452
Compare at $620
GIA0.3ct | Marquise | D | SI1 | Ideal
From $420
Compare at $433
GIA0.3ct | Marquise | E | VS2 | Very Good
From $479
Compare at $480
GIA0.3ct | Marquise | E | SI1 | Good
From $420
Compare at $432
GIASave 10.1%0.3ct | Marquise | F | VS2 | Very Good
From $477
Compare at $530
GIASave 21.6%0.3ct | Marquise | G | VVS1 | Ideal
From $635
Compare at $810
GIASave 27.9%0.3ct | Marquise | F | VS2 | Ideal
From $498
Compare at $690
GIA0.3ct | Marquise | E | VS2 | Very Good
From $489
Compare at $540
GIASave 15.2%0.3ct | Marquise | E | VS1 | Excellent
From $520
Compare at $613
GIASave 21.1%0.3ct | Marquise | F | VVS2 | Ideal
From $623
Compare at $790
GIASave 16.3%0.3ct | Marquise | F | VVS1 | Excellent
From $540
Compare at $645
GIASave 20%0.3ct | Marquise | F | VS1 | Excellent
From $688
Compare at $860
0.3ct | Marquise | D | VS2 | Ideal
From $570
Compare at $657
GIA0.3ct | Marquise | H | VS1 | Ideal
From $492
Compare at $500
GIA0.3ct | Marquise | G | VS2 | Ideal
From $489
Compare at $500
GIASave 27.8%0.3ct | Marquise | E | VS2 | Ideal
From $491
Compare at $680
GIASave 14.5%0.3ct | Marquise | F | VS2 | Ideal
From $479
Compare at $560
GIA0.3ct | Marquise | F | SI1 | Very Good
From $423
Compare at $450
GIASave 23.2%0.3ct | Marquise | E | VS1 | Ideal
From $584
Compare at $760
GIASave 14.5%0.3ct | Marquise | F | VS2 | Ideal
From $479
Compare at $560
GIASave 20.1%0.3ct | Marquise | G | VVS1 | Excellent
From $639
Compare at $800
GIASave 13.4%0.3ct | Marquise | E | VVS2 | Excellent
From $560
Compare at $647
GIA0.3ct | Marquise | F | VS2 | Ideal
From $450
Compare at $469
GIASave 13.8%0.3ct | Marquise | F | VS1 | Excellent
From $520
Compare at $603
GIASave 15.8%0.3ct | Marquise | F | VVS1 | Excellent
From $530
Compare at $630
Entry pricing in this category starts around $320.
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 $750 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 $550 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 358 comparable stones in this segment. Prices start around $320 and go up to $1,070.
Based on the latest market data, the average asking price is about $556 with a median around $550.
The observed spread is roughly $750 across tracked listings, which is about 70.1% 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 $550, 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 3 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 $750 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.