How much does a 0.20 to 0.49ct I SI2 natural princess diamond cost?

As of October 2026, 0.20 to 0.49ct I SI2 natural princess diamonds typically cost $302 SGD to $593 SGD, with a median price of $391 SGD. There are currently 94 diamonds matching this specification available across retailers.

Where can I find the best price on a I SI2 princess diamond?

About 54% of these diamonds are available at multiple retailers, with an average price spread of 34%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct I SI2 Natural Princess

Quick answer

As of October 2026, there are 94 natural princess diamonds with I colour and SI2 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run $302 SGD to $593 SGD, with a median of $391 SGD. At least 12 retailers stock this exact specification, and 54% of the stones appear at more than one of them, with an average price spread of 34%. Half of all listings fall between $972 SGD and $1,375 SGD per carat. Over the last 30 days the median price moved -0.4% and the number of listings moved -18.7%.

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

Lowest Price

$179 SGD

Highest Price

$1,168 SGD

Average Price

$441 SGD

Market Intelligence

Retailers Selling

Cross Retailer %

53.9%

Price Spread

34.1%

30-Day Price Trend

-0.4%

30-Day Supply Change

-18.7%

Volatility (30d)

0.03

Price Range

Price per carat distribution across retailers

$923/ct

10th Percentile

$647

Median

$923

90th Percentile

$1,400

Score Distribution

212 diamonds scored across 4 quality tiers

Excellent

3 (1.4%)

Very Good

71 (33.5%)

Good

25 (11.8%)

Average

113 (53.3%)

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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