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

As of October 2026, 1.50 to 1.99ct J SI1 natural princess diamonds typically cost $2,778 USD to $7,512 USD, with a median price of $4,620 USD. There are currently 178 diamonds matching this specification available across retailers.

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

About 35% of these diamonds are available at multiple retailers, with an average price spread of 49%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct J SI1 Natural Princess

Quick answer

As of October 2026, there are 178 natural princess diamonds with J color and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $2,778 USD to $7,512 USD, with a median of $4,620 USD. At least 55 retailers stock this exact specification, and 35% of the stones appear at more than one of them, with an average price spread of 49%. Half of all listings fall between $2,048 USD and $3,284 USD per carat. The same specification in lab grown form lists at a median of about $1,110 USD 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

178

Lowest Price

$1,959 USD

Highest Price

$12,246 USD

Average Price

$4,922 USD

Market Intelligence

Retailers Selling

Cross Retailer %

34.7%

Price Spread

48.8%

30-Day Price Trend

-2.7%

30-Day Supply Change

+14.1%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$2,532/ct

10th Percentile

$1,707

Median

$2,532

90th Percentile

$4,115

Score Distribution

546 diamonds scored across 4 quality tiers

Excellent

74 (13.6%)

Very Good

90 (16.5%)

Good

109 (20.0%)

Average

273 (50.0%)

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Consider Instead

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

J SI2SI2 inclusions are not visible without magnification

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Lab-Grown J 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