How much does a 1.00 to 1.49ct I SI2 lab grown princess diamond cost?

As of September 2026, 1.00 to 1.49ct I SI2 lab grown princess diamonds typically cost HK$7,607 HKD to HK$28,128 HKD, with a median price of HK$14,335 HKD. There are currently 31 diamonds matching this specification available across retailers.

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

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1.00 to 1.49ct I SI2 Lab Grown Princess

Quick answer

As of September 2026, there are 31 lab grown princess diamonds with I colour and SI2 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run HK$7,607 HKD to HK$28,128 HKD, with a median of HK$14,335 HKD. At least 10 retailers stock this exact specification. Half of all listings fall between HK$11,242 HKD and HK$16,503 HKD per carat. The same specification in natural form lists at a median of about HK$17,047 HKD 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 lab grown stones in the index: 481 USD per carat, -7.3% 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

Lowest Price

HK$3,662 HKD

Highest Price

HK$39,557 HKD

Average Price

HK$16,344 HKD

Market Intelligence

Retailers Selling

Price Spread

39.4%

Price Range

Price per carat distribution across retailers

$1,701/ct

10th Percentile

$1,006

Median

$1,701

90th Percentile

$2,938

Score Distribution

31 diamonds scored across 3 quality tiers

Excellent

2 (6.5%)

Very Good

4 (12.9%)

Average

25 (80.6%)

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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