How much does a 1.00 to 1.49ct H I1 natural marquise diamond cost?

As of November 2026, 1.00 to 1.49ct H I1 natural marquise diamonds typically cost $2,399 AUD to $11,198 AUD, with a median price of $4,885 AUD. There are currently 56 diamonds matching this specification available across retailers.

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

About 19% of these diamonds are available at multiple retailers, with an average price spread of 75%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct H I1 Natural Marquise

Quick answer

As of November 2026, there are 56 natural marquise diamonds with H colour and I1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $2,399 AUD to $11,198 AUD, with a median of $4,885 AUD. At least 27 retailers stock this exact specification, and 19% of the stones appear at more than one of them, with an average price spread of 75%. Half of all listings fall between $2,435 AUD and $5,078 AUD per carat. Over the last 30 days the median price moved -1.8% and the number of listings moved +5.5%.

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

$742 AUD

Highest Price

$17,398 AUD

Average Price

$5,493 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

19.2%

Price Spread

75.0%

30-Day Price Trend

-1.8%

30-Day Supply Change

+5.5%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$2,473/ct

10th Percentile

$1,273

Median

$2,473

90th Percentile

$4,352

Score Distribution

186 diamonds scored across 4 quality tiers

Excellent

11 (5.9%)

Very Good

34 (18.3%)

Good

23 (12.4%)

Average

118 (63.4%)

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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