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

As of October 2026, 1.00 to 1.49ct J SI2 natural princess diamonds typically cost €1,027 EUR to €3,034 EUR, with a median price of €1,823 EUR. There are currently 175 diamonds matching this specification available across retailers.

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

About 38% 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 J SI2 Natural Princess

Quick answer

As of October 2026, there are 175 natural princess diamonds with J colour and SI2 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run €1,027 EUR to €3,034 EUR, with a median of €1,823 EUR. At least 47 retailers stock this exact specification, and 38% of the stones appear at more than one of them, with an average price spread of 58%. Half of all listings fall between €1,018 EUR and €1,780 EUR per carat. Over the last 30 days the median price moved -0.8% and the number of listings moved +14.3%.

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

175

Lowest Price

€707 EUR

Highest Price

€6,077 EUR

Average Price

€1,952 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

37.6%

Price Spread

58.0%

30-Day Price Trend

-0.8%

30-Day Supply Change

+14.3%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,460/ct

10th Percentile

$965

Median

$1,460

90th Percentile

$2,780

Score Distribution

497 diamonds scored across 4 quality tiers

Excellent

56 (11.3%)

Very Good

105 (21.1%)

Good

85 (17.1%)

Average

251 (50.5%)

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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