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

As of October 2026, 1.50 to 1.99ct F SI2 natural marquise diamonds typically cost HK$33,362 HKD to HK$130,246 HKD, with a median price of HK$65,765 HKD. There are currently 183 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 October 2026, there are 183 natural marquise diamonds with F colour and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run HK$33,362 HKD to HK$130,246 HKD, with a median of HK$65,765 HKD. 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 HK$31,790 HKD and HK$53,497 HKD 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: October 2026

Available

183

Lowest Price

HK$21,876 HKD

Highest Price

HK$222,073 HKD

Average Price

HK$75,496 HKD

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

436 diamonds scored across 4 quality tiers

Excellent

85 (19.5%)

Very Good

120 (27.5%)

Good

81 (18.6%)

Average

150 (34.4%)

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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