How much does a 1.50 to 1.99ct F SI2 natural marquise diamond cost?

As of November 2026, 1.50 to 1.99ct F SI2 natural marquise diamonds typically cost $7,543 NZD to $29,780 NZD, with a median price of $14,920 NZD. There are currently 182 diamonds matching this specification available across retailers.

Where can I find the best price on a F SI2 marquise diamond?

About 36% of these diamonds are available at multiple retailers, with an average price spread of 50%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct F SI2 Natural Marquise

Quick answer

As of November 2026, there are 182 natural marquise diamonds with F colour and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $7,543 NZD to $29,780 NZD, with a median of $14,920 NZD. At least 52 retailers stock this exact specification, and 36% of the stones appear at more than one of them, with an average price spread of 50%. Half of all listings fall between $7,189 NZD and $12,098 NZD per carat. Over the last 30 days the median price moved -1.5% and the number of listings moved +13.0%.

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

182

Lowest Price

$4,947 NZD

Highest Price

$55,523 NZD

Average Price

$17,164 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

36.0%

Price Spread

49.9%

30-Day Price Trend

-1.5%

30-Day Supply Change

+13.0%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$5,542/ct

10th Percentile

$3,065

Median

$5,542

90th Percentile

$8,628

Score Distribution

435 diamonds scored across 4 quality tiers

Excellent

85 (19.5%)

Very Good

120 (27.6%)

Good

80 (18.4%)

Average

150 (34.5%)

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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