How much does a 1.50 to 1.99ct E SI1 natural princess diamond cost?

As of October 2026, 1.50 to 1.99ct E SI1 natural princess diamonds typically cost €3,866 EUR to €12,778 EUR, with a median price of €6,077 EUR. There are currently 165 diamonds matching this specification available across retailers.

Where can I find the best price on a E SI1 princess diamond?

About 37% of these diamonds are available at multiple retailers, with an average price spread of 71%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct E SI1 Natural Princess

Quick answer

As of October 2026, there are 165 natural princess diamonds with E colour and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run €3,866 EUR to €12,778 EUR, with a median of €6,077 EUR. At least 57 retailers stock this exact specification, and 37% of the stones appear at more than one of them, with an average price spread of 71%. Half of all listings fall between €3,163 EUR and €6,187 EUR per carat. The same specification in lab grown form lists at a median of about €331 EUR per carat. Over the last 30 days the median price moved -5.5% and the number of listings moved +6.9%.

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

165

Lowest Price

€2,942 EUR

Highest Price

€22,506 EUR

Average Price

€7,495 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

36.6%

Price Spread

70.8%

30-Day Price Trend

-5.5%

30-Day Supply Change

+6.9%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$4,757/ct

10th Percentile

$3,047

Median

$4,757

90th Percentile

$8,926

Score Distribution

439 diamonds scored across 4 quality tiers

Excellent

69 (15.7%)

Very Good

102 (23.2%)

Good

126 (28.7%)

Average

142 (32.3%)

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Consider Instead

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

E SI2SI2 inclusions are not visible without magnification

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Lab-Grown E SI1Same 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