How much does a 1.50 to 1.99ct I IF natural princess diamond cost?

As of October 2026, 1.50 to 1.99ct I IF natural princess diamonds typically cost £3,165 GBP to £10,349 GBP, with a median price of £4,743 GBP. There are currently 17 diamonds matching this specification available across retailers.

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

About 43% of these diamonds are available at multiple retailers, with an average price spread of 38%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct I IF Natural Princess

Quick answer

As of October 2026, there are 17 natural princess diamonds with I colour and IF clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run £3,165 GBP to £10,349 GBP, with a median of £4,743 GBP. At least 48 retailers stock this exact specification, and 43% of the stones appear at more than one of them, with an average price spread of 38%. Half of all listings fall between £2,827 GBP and £4,083 GBP per carat. Over the last 30 days the median price moved -4.9% and the number of listings moved +14.1%.

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

£2,578 GBP

Highest Price

£12,868 GBP

Average Price

£6,124 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

42.6%

Price Spread

37.6%

30-Day Price Trend

-4.9%

30-Day Supply Change

+14.1%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$4,450/ct

10th Percentile

$3,257

Median

$4,450

90th Percentile

$7,055

Score Distribution

40 diamonds scored across 4 quality tiers

Excellent

12 (30.0%)

Very Good

6 (15.0%)

Good

7 (17.5%)

Average

15 (37.5%)

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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