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

As of November 2026, 5.00ct+ G SI1 lab grown heart diamonds typically cost HK$6,989 HKD to HK$97,969 HKD, with a median price of HK$31,367 HKD. There are currently 15 diamonds matching this specification available across retailers.

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

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5.00ct+ G SI1 Lab Grown Heart

Quick answer

As of November 2026, there are 15 lab grown heart diamonds with G colour and SI1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run HK$6,989 HKD to HK$97,969 HKD, with a median of HK$31,367 HKD.

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. Heart lab grown stones in the index: 421 USD per carat, -1.8% 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: November 2026

Available

Lowest Price

HK$5,304 HKD

Highest Price

HK$296,763 HKD

Average Price

HK$44,723 HKD

Score Distribution

19 diamonds scored across 4 quality tiers

Excellent

5 (26.3%)

Very Good

7 (36.8%)

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