How much does a 1.50 to 1.99ct F SI1 natural princess diamond cost?

As of October 2026, 1.50 to 1.99ct F SI1 natural princess diamonds typically cost €3,789 EUR to €13,951 EUR, with a median price of €7,693 EUR. There are currently 152 diamonds matching this specification available across retailers.

Where can I find the best price on a F SI1 princess diamond?

About 33% of these diamonds are available at multiple retailers, with an average price spread of 64%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct F SI1 Natural Princess

Quick answer

As of October 2026, there are 152 natural princess diamonds with F colour and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run €3,789 EUR to €13,951 EUR, with a median of €7,693 EUR. At least 59 retailers stock this exact specification, and 33% of the stones appear at more than one of them, with an average price spread of 64%. Half of all listings fall between €3,300 EUR and €6,207 EUR per carat. The same specification in lab grown form lists at a median of about €323 EUR per carat. Over the last 30 days the median price moved -1.9% and the number of listings moved +7.4%.

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. Princess natural stones in the index: 2,158 USD per carat, +5.7% 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

152

Lowest Price

€1,334 EUR

Highest Price

€20,786 EUR

Average Price

€8,319 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

32.6%

Price Spread

64.2%

30-Day Price Trend

-1.9%

30-Day Supply Change

+7.4%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$5,057/ct

10th Percentile

$3,010

Median

$5,057

90th Percentile

$8,564

Score Distribution

364 diamonds scored across 4 quality tiers

Excellent

50 (13.7%)

Very Good

64 (17.6%)

Good

94 (25.8%)

Average

156 (42.9%)

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Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

F SI2SI2 inclusions are not visible without magnification

Save 31%

Lab-Grown F SI1Same specifications, lab-grown origin

Save 93%

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