1.3 Carat Marquise Natural Diamond Prices Comparison

As of May 2026, 1.3 carat marquise natural diamonds usually range from $768 to $19,662, with an average price of $8,004.In the last month, prices for these diamonds are up 2.4%.Compare 19 verified listings across 7 retailers tracked by CaratRadar.

Market Insights
Last updated: 2026-05-30

1.3 Carat Marquise Natural Diamond Market Overview

CaratRadar currently tracks 19 verified 1.3-carat marquise natural diamonds listed across 7 online retailers. Prices in this segment range from $768 to $19,662, with an average asking price of $8,004 and a median of $7,405.

The price spread of $18,894 (96.1% 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.

  • 19 diamonds tracked in this segment

  • Price range: $768 to $19,662

  • Average price: $8,004

  • Median price: $7,405

  • Available across 7 retailers

  • Savings potential: up to 96.1%

Price Range Overview

As of May 30, 2026
Spread $18,894

Real market range for this carat, shape, and diamond type.

$768$19,662
Tracked

19

Lowest

$768

Average

$8,004

Median

$7,405

Highest

$19,662

Price History

Price Comparison Matrix

Live Listings

See all listings

Compare current retailer offers for this exact segment and open any listing for full details.

GIA | 1.31ct | Marquise | J | SI2 | Excellent
Save 19%

GIA | 1.31ct | Marquise | J | SI2 | Excellent

From $3,159

Compare at $3,899

2 stores
GIA | 1.31ct | Marquise | J | VS2 | Ideal
Save 40.2%

GIA | 1.31ct | Marquise | J | VS2 | Ideal

From $3,417

Compare at $5,714

2 stores
GIA | 1.31ct | Marquise | H | SI2 | Excellent
Save 37.5%

GIA | 1.31ct | Marquise | H | SI2 | Excellent

From $3,962

Compare at $6,336

2 stores
IGI | 1.31ct | Marquise | I | SI1 | Ideal

IGI | 1.31ct | Marquise | I | SI1 | Ideal

From $4,235

Compare at $4,366

2 stores
GIA | 1.32ct | Marquise | J | VVS1 | Very Good
Save 39.8%

GIA | 1.32ct | Marquise | J | VVS1 | Very Good

From $4,315

Compare at $7,168

4 stores
GIA | 1.31ct | Marquise | H | SI1 | Excellent
Save 39.9%

GIA | 1.31ct | Marquise | H | SI1 | Excellent

From $5,045

Compare at $8,389

4 stores
GIA | 1.32ct | Marquise | I | VS2 | Very Good
Save 37.7%

GIA | 1.32ct | Marquise | I | VS2 | Very Good

From $5,327

Compare at $8,554

7 stores
GIA | 1.35ct | Marquise | I | IF | Ideal

GIA | 1.35ct | Marquise | I | IF | Ideal

From $6,593

Compare at $7,279

3 stores
GIA | 1.37ct | Marquise | D | SI2 | Excellent
Save 22.4%

GIA | 1.37ct | Marquise | D | SI2 | Excellent

From $8,381

Compare at $10,797

2 stores
GIA | 1.31ct | Marquise | F | VS1 | Excellent
Save 34.6%

GIA | 1.31ct | Marquise | F | VS1 | Excellent

From $8,450

Compare at $12,912

4 stores
GIA | 1.37ct | Marquise | E | VS1 | Excellent
Save 36.8%

GIA | 1.37ct | Marquise | E | VS1 | Excellent

From $10,174

Compare at $16,093

5 stores
GIA | 1.31ct | Marquise | D | VS1 | Excellent
Save 22.7%

GIA | 1.31ct | Marquise | D | VS1 | Excellent

From $10,175

Compare at $13,159

2 stores
GIA | 1.31ct | Marquise | D | VVS2 | Ideal
Save 38.6%

GIA | 1.31ct | Marquise | D | VVS2 | Ideal

From $10,877

Compare at $17,712

6 stores
GIA | 1.31ct | Marquise | D | VVS1 | Ideal
Save 32.7%

GIA | 1.31ct | Marquise | D | VVS1 | Ideal

From $11,020

Compare at $16,381

3 stores
GIA | 1.31ct | Marquise | D | VVS2 | Excellent
Save 32.8%

GIA | 1.31ct | Marquise | D | VVS2 | Excellent

From $11,560

Compare at $17,206

3 stores
GIA | 1.34ct | Marquise | D | IF | Excellent
Save 35.5%

GIA | 1.34ct | Marquise | D | IF | Excellent

From $12,150

Compare at $18,836

3 stores
GIA | 1.35ct | Marquise | D | VVS1 | Ideal

GIA | 1.35ct | Marquise | D | VVS1 | Ideal

From $12,960

Compare at $14,278

2 stores
GIA | 1.38ct | Marquise | D | IF | Excellent
Save 19.9%

GIA | 1.38ct | Marquise | D | IF | Excellent

From $14,371

Compare at $17,936

2 stores
GIA | 1.31ct | Marquise | D | FL | Excellent

GIA | 1.31ct | Marquise | D | FL | Excellent

From $14,724

Compare at $15,603

2 stores

Entry pricing in this category starts around $768.

What to Know When Shopping for 1.3 Carat Marquise Natural Diamonds

  1. Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $18,894 or more.
  2. 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.
  3. The median price of $7,405 is a useful benchmark. If you see a deal significantly below this, verify the retailer's reputation and return policy.
  4. 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.
  5. Compare natural vs. lab-grown options for the same carat and shape. Lab-grown diamonds are chemically identical but often 30-50% less expensive.
  6. Check shipping, insurance, and return policies. The lowest sticker price is not always the best deal once you factor in total cost of purchase.
  7. Marquise diamonds maximize carat weight face-up and appear larger than their actual weight. Check symmetry carefully.

Frequently Asked Questions

We currently track 19 comparable stones in this segment. Prices start around $768 and go up to $19,662.

Based on the latest market data, the average asking price is about $8,004 with a median around $7,405.

The observed spread is roughly $18,894 across tracked listings, which is about 96.1% 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 $8,004. The median price is $7,405, 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 7 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 $18,894 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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