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

As of October 2026, 0.75 to 0.99ct D SI1 natural princess diamonds typically cost $1,529 AUD to $4,952 AUD, with a median price of $2,675 AUD. There are currently 117 diamonds matching this specification available across retailers.

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

About 35% of these diamonds are available at multiple retailers, with an average price spread of 80%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct D SI1 Natural Princess

Quick answer

As of October 2026, there are 117 natural princess diamonds with D colour and SI1 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run $1,529 AUD to $4,952 AUD, with a median of $2,675 AUD. At least 62 retailers stock this exact specification, and 35% of the stones appear at more than one of them, with an average price spread of 80%. Half of all listings fall between $1,977 AUD and $4,086 AUD per carat. The same specification in lab grown form lists at a median of about $517 AUD per carat. Over the last 30 days the median price moved -8.1% and the number of listings moved +14.4%.

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

117

Lowest Price

$1,245 AUD

Highest Price

$8,586 AUD

Average Price

$3,016 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

35.1%

Price Spread

80.4%

30-Day Price Trend

-8.1%

30-Day Supply Change

+14.4%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$1,843/ct

10th Percentile

$1,227

Median

$1,843

90th Percentile

$3,950

Score Distribution

313 diamonds scored across 4 quality tiers

Excellent

46 (14.7%)

Very Good

45 (14.4%)

Good

92 (29.4%)

Average

130 (41.5%)

Find Your Diamond

Search 117 D SI1 princess diamonds and compare prices.

Search Diamonds

Consider Instead

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

D SI2SI2 inclusions are not visible without magnification

Save 15%

Lab-Grown D SI1Same specifications, lab-grown origin

Save 80%

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