How much does a 0.20 to 0.49ct H SI1 lab grown princess diamond cost?

As of October 2026, 0.20 to 0.49ct H SI1 lab grown princess diamonds typically cost $637 USD to $921 USD, with a median price of $804 USD. There are currently 1 diamonds matching this specification available across retailers.

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

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0.20 to 0.49ct H SI1 Lab Grown Princess

Quick answer

As of October 2026, there are 1 lab grown princess diamonds with H color and SI1 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run $637 USD to $921 USD, with a median of $804 USD. The same specification in natural form lists at a median of about $1,082 USD per carat.

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

0.43ct Princess H SI1, GIA, grade B+, from $950 USD

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 lab grown stones in the index: 461 USD per carat, -4.8% 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

$595 USD

Highest Price

$950 USD

Average Price

$783 USD

Score Distribution

3 diamonds scored across 3 quality tiers

Very Good

1 (33.3%)

Good

1 (33.3%)

Average

1 (33.3%)

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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