How much does a 0.50 to 0.74ct I IF natural marquise diamond cost?

As of November 2026, 0.50 to 0.74ct I IF natural marquise diamonds typically cost $1,134 NZD to $2,832 NZD, with a median price of $1,557 NZD. There are currently 82 diamonds matching this specification available across retailers.

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

About 35% of these diamonds are available at multiple retailers, with an average price spread of 53%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct I IF Natural Marquise

Quick answer

As of November 2026, there are 82 natural marquise diamonds with I colour and IF clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run $1,134 NZD to $2,832 NZD, with a median of $1,557 NZD. At least 57 retailers stock this exact specification, and 35% of the stones appear at more than one of them, with an average price spread of 53%. Half of all listings fall between $2,887 NZD and $4,791 NZD per carat. Over the last 30 days the median price moved -0.3% and the number of listings moved +3.7%.

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

$732 NZD

Highest Price

$7,450 NZD

Average Price

$1,813 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

34.8%

Price Spread

53.1%

30-Day Price Trend

-0.3%

30-Day Supply Change

+3.7%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$2,018/ct

10th Percentile

$1,382

Median

$2,018

90th Percentile

$3,826

Score Distribution

187 diamonds scored across 4 quality tiers

Excellent

57 (30.5%)

Very Good

50 (26.7%)

Good

56 (29.9%)

Average

24 (12.8%)

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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