How much does a 0.50 to 0.74ct D SI1 natural princess diamond cost?

As of October 2026, 0.50 to 0.74ct D SI1 natural princess diamonds typically cost $771 AUD to $1,921 AUD, with a median price of $1,179 AUD. There are currently 421 diamonds matching this specification available across retailers.

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

About 40% of these diamonds are available at multiple retailers, with an average price spread of 32%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct D SI1 Natural Princess

Quick answer

As of October 2026, there are 421 natural princess diamonds with D colour and SI1 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run $771 AUD to $1,921 AUD, with a median of $1,179 AUD. At least 57 retailers stock this exact specification, and 40% of the stones appear at more than one of them, with an average price spread of 32%. Half of all listings fall between $1,632 AUD and $2,220 AUD per carat. The same specification in lab grown form lists at a median of about $766 AUD per carat. Over the last 30 days the median price moved -2.1% and the number of listings moved +42.4%.

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

421

Lowest Price

$555 AUD

Highest Price

$3,168 AUD

Average Price

$1,303 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

39.7%

Price Spread

31.9%

30-Day Price Trend

-2.1%

30-Day Supply Change

+42.4%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$1,297/ct

10th Percentile

$1,033

Median

$1,297

90th Percentile

$2,131

Score Distribution

957 diamonds scored across 4 quality tiers

Excellent

123 (12.9%)

Very Good

242 (25.3%)

Good

151 (15.8%)

Average

441 (46.1%)

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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

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Lab-Grown D 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