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

As of October 2026, 1.50 to 1.99ct H SI1 natural princess diamonds typically cost $3,948 USD to $11,663 USD, with a median price of $7,223 USD. There are currently 203 diamonds matching this specification available across retailers.

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

About 30% of these diamonds are available at multiple retailers, with an average price spread of 59%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct H SI1 Natural Princess

Quick answer

As of October 2026, there are 203 natural princess diamonds with H color and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $3,948 USD to $11,663 USD, with a median of $7,223 USD. At least 58 retailers stock this exact specification, and 30% of the stones appear at more than one of them, with an average price spread of 59%. Half of all listings fall between $2,937 USD and $5,148 USD per carat. The same specification in lab grown form lists at a median of about $862 USD per carat. Over the last 30 days the median price moved -2.3% and the number of listings moved +6.7%.

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

203

Lowest Price

$2,705 USD

Highest Price

$18,752 USD

Average Price

$7,588 USD

Market Intelligence

Retailers Selling

Cross Retailer %

29.8%

Price Spread

58.7%

30-Day Price Trend

-2.3%

30-Day Supply Change

+6.7%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$3,767/ct

10th Percentile

$2,440

Median

$3,767

90th Percentile

$6,382

Score Distribution

673 diamonds scored across 4 quality tiers

Excellent

73 (10.8%)

Very Good

95 (14.1%)

Good

129 (19.2%)

Average

376 (55.9%)

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Consider Instead

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

H SI2SI2 inclusions are not visible without magnification

Save 16%

Lab-Grown H SI1Same specifications, lab-grown origin

Save 77%

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