How much does a 0.75 to 0.99ct I IF natural marquise diamond cost?

As of November 2026, 0.75 to 0.99ct I IF natural marquise diamonds typically cost $3,430 NZD to $6,070 NZD, with a median price of $4,688 NZD. There are currently 15 diamonds matching this specification available across retailers.

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

About 36% of these diamonds are available at multiple retailers, with an average price spread of 43%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct I IF Natural Marquise

Quick answer

As of November 2026, there are 15 natural marquise diamonds with I colour and IF clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run $3,430 NZD to $6,070 NZD, with a median of $4,688 NZD. At least 48 retailers stock this exact specification, and 36% of the stones appear at more than one of them, with an average price spread of 43%. Half of all listings fall between $5,080 NZD and $7,784 NZD per carat. Over the last 30 days the median price moved +2.3% and the number of listings moved +3.2%.

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

$1,405 NZD

Highest Price

$14,254 NZD

Average Price

$4,668 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

36.0%

Price Spread

43.0%

30-Day Price Trend

+2.3%

30-Day Supply Change

+3.2%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$3,540/ct

10th Percentile

$2,183

Median

$3,540

90th Percentile

$5,793

Score Distribution

33 diamonds scored across 4 quality tiers

Excellent

14 (42.4%)

Very Good

8 (24.2%)

Good

5 (15.2%)

Average

6 (18.2%)

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J IFJ colour is visually identical to I to the naked eye

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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