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 $511 NZD to $1,221 NZD, with a median price of $830 NZD. 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 49%. 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 colour and I1 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run $511 NZD to $1,221 NZD, with a median of $830 NZD. 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 49%. Half of all listings fall between $1,305 NZD and $2,104 NZD per carat.

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

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Marquise natural stones in the index: 2,177 USD per carat, -4.2% 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

$461 NZD

Highest Price

$1,679 NZD

Average Price

$861 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

25.0%

Price Spread

49.2%

Price Range

Price per carat distribution across retailers

$915/ct

10th Percentile

$692

Median

$915

90th Percentile

$1,470

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%)

Find Your Diamond

Search 11 H I1 marquise diamonds and compare prices.

Search Diamonds

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