How much does a 1.50 to 1.99ct J I1 natural princess diamond cost?

As of October 2026, 1.50 to 1.99ct J I1 natural princess diamonds typically cost £2,136 GBP to £4,625 GBP, with a median price of £3,287 GBP. There are currently 27 diamonds matching this specification available across retailers.

Where can I find the best price on a J I1 princess diamond?

About 12% of these diamonds are available at multiple retailers, with an average price spread of 39%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct J I1 Natural Princess

Quick answer

As of October 2026, there are 27 natural princess diamonds with J colour and I1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run £2,136 GBP to £4,625 GBP, with a median of £3,287 GBP. At least 25 retailers stock this exact specification, and 12% of the stones appear at more than one of them, with an average price spread of 39%. Half of all listings fall between £1,449 GBP and £2,172 GBP per carat. The same specification in lab grown form lists at a median of about £712 GBP per carat. Over the last 30 days the median price moved -0.2% and the number of listings moved -2.3%.

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

£748 GBP

Highest Price

£8,342 GBP

Average Price

£3,335 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

11.7%

Price Spread

39.5%

30-Day Price Trend

-0.2%

30-Day Supply Change

-2.3%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$2,457/ct

10th Percentile

$1,511

Median

$2,457

90th Percentile

$3,373

Score Distribution

157 diamonds scored across 4 quality tiers

Excellent

2 (1.3%)

Very Good

22 (14.0%)

Good

5 (3.2%)

Average

128 (81.5%)

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Consider Instead

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

Lab-Grown J I1Same 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