How much does a 1.50 to 1.99ct J SI2 natural princess diamond cost?

As of October 2026, 1.50 to 1.99ct J SI2 natural princess diamonds typically cost £1,889 GBP to £4,996 GBP, with a median price of £3,249 GBP. There are currently 132 diamonds matching this specification available across retailers.

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

About 36% of these diamonds are available at multiple retailers, with an average price spread of 55%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct J SI2 Natural Princess

Quick answer

As of October 2026, there are 132 natural princess diamonds with J colour and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run £1,889 GBP to £4,996 GBP, with a median of £3,249 GBP. At least 48 retailers stock this exact specification, and 36% of the stones appear at more than one of them, with an average price spread of 55%. Half of all listings fall between £1,342 GBP and £2,268 GBP per carat. The same specification in lab grown form lists at a median of about £987 GBP per carat. Over the last 30 days the median price moved -2.7% 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

132

Lowest Price

£1,292 GBP

Highest Price

£9,078 GBP

Average Price

£3,406 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

35.7%

Price Spread

54.7%

30-Day Price Trend

-2.7%

30-Day Supply Change

+14.1%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$2,254/ct

10th Percentile

$1,528

Median

$2,254

90th Percentile

$3,910

Score Distribution

399 diamonds scored across 4 quality tiers

Excellent

47 (11.8%)

Very Good

65 (16.3%)

Good

81 (20.3%)

Average

206 (51.6%)

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Consider Instead

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

Lab-Grown J 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