How much does a 1.00 to 1.49ct D SI1 natural princess diamond cost?

As of September 2026, 1.00 to 1.49ct D SI1 natural princess diamonds typically cost $1,924 USD to $5,304 USD, with a median price of $2,691 USD. There are currently 350 diamonds matching this specification available across retailers.

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

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1.00 to 1.49ct D SI1 Natural Princess

Quick answer

As of September 2026, there are 350 natural princess diamonds with D color and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $1,924 USD to $5,304 USD, with a median of $2,691 USD. At least 59 retailers stock this exact specification. Half of all listings fall between $2,102 USD and $3,302 USD per carat. The same specification in lab grown form lists at a median of about $390 USD per carat.

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

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Princess natural stones in the index: 2,073 USD per carat, -3.2% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

350

Lowest Price

$531 USD

Highest Price

$11,872 USD

Average Price

$3,253 USD

Market Intelligence

Retailers Selling

Price Spread

48.1%

Price Range

Price per carat distribution across retailers

$2,497/ct

10th Percentile

$1,883

Median

$2,497

90th Percentile

$4,631

Score Distribution

350 diamonds scored across 4 quality tiers

Excellent

58 (16.6%)

Very Good

79 (22.6%)

Good

121 (34.6%)

Average

92 (26.3%)

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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