How much does a 1.00 to 1.49ct K SI2 natural princess diamond cost?

As of November 6, 2026, 1.00 to 1.49ct K SI2 natural princess diamonds typically cost $873 USD to $2,614 USD, with a median price of $1,256 USD. There are currently 220 diamonds matching this specification available across retailers.

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

About 47% of these diamonds are available at multiple retailers, with an average price spread of 66%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct K SI2 Natural Princess

Quick answer

As of November 6, 2026, there are 220 natural princess diamonds with K color and SI2 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $873 USD to $2,614 USD, with a median of $1,256 USD. Half of all listings fall between $919 USD and $1,718 USD per carat. The same specification in lab grown form lists at a median of about $845 USD per carat. Over the last 30 days the median price moved -0.8% and the number of listings moved +12.8%.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Princess natural stones in the index: 1,991 USD per carat, -8.2% month on month. See the full index release

Figures come from current listings across more than 125 retailers. The index is a monthly release.

Last updated: November 6, 2026

Available

220

Lowest Price

$665 USD

Highest Price

$4,754 USD

Average Price

$1,556 USD

Market Intelligence

Cross Retailer %

46.8%

Price Spread

66.4%

30-Day Price Trend

-0.8%

30-Day Supply Change

+12.8%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,202/ct

10th Percentile

$858

Median

$1,202

90th Percentile

$2,432

Score Distribution

220 diamonds scored across 4 quality tiers

Excellent

33 (15.0%)

Very Good

71 (32.3%)

Good

53 (24.1%)

Average

63 (28.6%)

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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