How much does a 5.00ct+ F SI1 natural princess diamond cost?

As of October 2026, 5.00ct+ F SI1 natural princess diamonds typically cost £55,384 GBP to £71,377 GBP, with a median price of £62,952 GBP. There are currently 2 diamonds matching this specification available across retailers.

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

About 38% of these diamonds are available at multiple retailers, with an average price spread of 41%. A comparison tool like Carat Hunter lets you see all the prices side by side.

5.00ct+ F SI1 Natural Princess

Quick answer

As of October 2026, there are 2 natural princess diamonds with F colour and SI1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run £55,384 GBP to £71,377 GBP, with a median of £62,952 GBP. At least 35 retailers stock this exact specification, and 38% of the stones appear at more than one of them, with an average price spread of 41%. Half of all listings fall between £11,416 GBP and £17,031 GBP per carat. The same specification in lab grown form lists at a median of about £183 GBP per carat. Over the last 30 days the median price moved +3.7% and the number of listings moved -1.4%.

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

Lowest Price

£53,492 GBP

Highest Price

£93,257 GBP

Average Price

£63,309 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

37.9%

Price Spread

40.6%

30-Day Price Trend

+3.7%

30-Day Supply Change

-1.4%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$18,512/ct

10th Percentile

$13,227

Median

$18,512

90th Percentile

$25,886

Score Distribution

3 diamonds scored across 3 quality tiers

Excellent

1 (33.3%)

Very Good

1 (33.3%)

Average

1 (33.3%)

Find Your Diamond

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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 21%

Lab-Grown F SI1Same specifications, lab-grown origin

Save 99%

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