How much does a 1.00 to 1.49ct F SI2 natural princess diamond cost?

As of October 2026, 1.00 to 1.49ct F SI2 natural princess diamonds typically cost £1,032 GBP to £3,395 GBP, with a median price of £1,682 GBP. There are currently 297 diamonds matching this specification available across retailers.

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

About 35% of these diamonds are available at multiple retailers, with an average price spread of 58%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct F SI2 Natural Princess

Quick answer

As of October 2026, there are 297 natural princess diamonds with F colour and SI2 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £1,032 GBP to £3,395 GBP, with a median of £1,682 GBP. 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 58%. Half of all listings fall between £1,247 GBP and £2,161 GBP per carat. The same specification in lab grown form lists at a median of about £298 GBP per carat. Over the last 30 days the median price moved -1.3% and the number of listings moved +6.8%.

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

297

Lowest Price

£682 GBP

Highest Price

£6,718 GBP

Average Price

£2,000 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

34.9%

Price Spread

58.2%

30-Day Price Trend

-1.3%

30-Day Supply Change

+6.8%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$2,105/ct

10th Percentile

$1,390

Median

$2,105

90th Percentile

$4,069

Score Distribution

677 diamonds scored across 4 quality tiers

Excellent

129 (19.1%)

Very Good

169 (25.0%)

Good

126 (18.6%)

Average

253 (37.4%)

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Consider Instead

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

F I1I1 inclusions are not visible without magnification

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Lab-Grown F SI2Same specifications, lab-grown origin

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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