How much does a 0.20 to 0.49ct H I1 natural marquise diamond cost?

As of November 2026, 0.20 to 0.49ct H I1 natural marquise diamonds typically cost $288 USD to $688 USD, with a median price of $468 USD. There are currently 11 diamonds matching this specification available across retailers.

Where can I find the best price on a H I1 marquise diamond?

About 25% of these diamonds are available at multiple retailers, with an average price spread of 58%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct H I1 Natural Marquise

Quick answer

As of November 2026, there are 11 natural marquise diamonds with H color and I1 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run $288 USD to $688 USD, with a median of $468 USD. At least 7 retailers stock this exact specification, and 25% of the stones appear at more than one of them, with an average price spread of 58%. Half of all listings fall between $771 USD and $1,302 USD per carat.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, September 2026: natural diamonds at 2,335 USD per carat and lab-grown at 443 USD per carat, a natural to lab ratio of 5.3 to 1. Marquise natural stones in the index: 2,268 USD per carat, +10.8% month on month. See the full index release

Figures come from current listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: November 2026

Available

Lowest Price

$260 USD

Highest Price

$946 USD

Average Price

$485 USD

Market Intelligence

Retailers Selling

Cross Retailer %

25.0%

Price Spread

57.6%

Price Range

Price per carat distribution across retailers

$922/ct

10th Percentile

$705

Median

$922

90th Percentile

$1,644

Score Distribution

56 diamonds scored across 4 quality tiers

Excellent

2 (3.6%)

Very Good

3 (5.4%)

Good

8 (14.3%)

Average

43 (76.8%)

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Related Specifications

D IF D VVS1 D VVS2 D VS1 D VS2 D SI1 E IF E VVS1 E VVS2 E VS1 E VS2 E SI1 F IF F VVS1 F VVS2 F VS1 F VS2 F SI1 G IF G VVS1 G VVS2 G VS1 G VS2 G SI1 H IF H VVS1 H VVS2 H VS1 H VS2 H SI1 I IF I VVS1 I VVS2 I VS1 I VS2 I SI1