How much does a 0.75 to 0.99ct J SI1 natural princess diamond cost?

As of October 2026, 0.75 to 0.99ct J SI1 natural princess diamonds typically cost $711 USD to $2,292 USD, with a median price of $1,078 USD. There are currently 136 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 65%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct J SI1 Natural Princess

Quick answer

As of October 2026, there are 136 natural princess diamonds with J color and SI1 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run $711 USD to $2,292 USD, with a median of $1,078 USD. At least 53 retailers stock this exact specification, and 35% of the stones appear at more than one of them, with an average price spread of 65%. Half of all listings fall between $952 USD and $1,732 USD per carat. The same specification in lab grown form lists at a median of about $646 USD per carat. Over the last 30 days the median price moved -4.8% and the number of listings moved +12.2%.

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

136

Lowest Price

$512 USD

Highest Price

$3,808 USD

Average Price

$1,267 USD

Market Intelligence

Retailers Selling

Cross Retailer %

35.0%

Price Spread

65.0%

30-Day Price Trend

-4.8%

30-Day Supply Change

+12.2%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,199/ct

10th Percentile

$828

Median

$1,199

90th Percentile

$2,552

Score Distribution

375 diamonds scored across 4 quality tiers

Excellent

43 (11.5%)

Very Good

67 (17.9%)

Good

104 (27.7%)

Average

161 (42.9%)

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Consider Instead

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

Lab-Grown J SI1Same specifications, lab-grown origin

Save 46%

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