How much does a 5.00ct+ G SI1 lab grown princess diamond cost?

As of October 2026, 5.00ct+ G SI1 lab grown princess diamonds typically cost HK$5,416 HKD to HK$22,512 HKD, with a median price of HK$9,649 HKD. There are currently 12 diamonds matching this specification available across retailers.

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

About 29% of these diamonds are available at multiple retailers, with an average price spread of 77%. A comparison tool like Carat Hunter lets you see all the prices side by side.

5.00ct+ G SI1 Lab Grown Princess

Quick answer

As of October 2026, there are 12 lab grown princess diamonds with G colour and SI1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run HK$5,416 HKD to HK$22,512 HKD, with a median of HK$9,649 HKD. At least 15 retailers stock this exact specification, and 29% of the stones appear at more than one of them, with an average price spread of 77%. Half of all listings fall between HK$1,314 HKD and HK$2,643 HKD per carat. The same specification in natural form lists at a median of about HK$145,313 HKD per carat.

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 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

HK$4,315 HKD

Highest Price

HK$59,701 HKD

Average Price

HK$12,344 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

28.6%

Price Spread

77.2%

Price Range

Price per carat distribution across retailers

$220/ct

10th Percentile

$140

Median

$220

90th Percentile

$685

Score Distribution

19 diamonds scored across 4 quality tiers

Excellent

7 (36.8%)

Very Good

5 (26.3%)

Good

2 (10.5%)

Average

5 (26.3%)

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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