How much does a 0.75 to 0.99ct G SI1 lab grown heart diamond cost?

As of October 2026, 0.75 to 0.99ct G SI1 lab grown heart diamonds typically cost HK$2,385 HKD to HK$2,385 HKD, with a median price of HK$2,385 HKD. There are currently 1 diamonds matching this specification available across retailers.

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

About 45% of these diamonds are available at multiple retailers, with an average price spread of 85%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct G SI1 Lab Grown Heart

Quick answer

As of October 2026, there are 1 lab grown heart diamonds with G colour and SI1 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run HK$2,385 HKD to HK$2,385 HKD, with a median of HK$2,385 HKD. At least 21 retailers stock this exact specification, and 45% of the stones appear at more than one of them, with an average price spread of 85%. Half of all listings fall between HK$2,383 HKD and HK$5,206 HKD per carat. The same specification in natural form lists at a median of about HK$13,983 HKD per carat. Over the last 30 days the median price moved -18.9% and the number of listings moved -11.9%.

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: October 2026

Available

Lowest Price

HK$2,385 HKD

Highest Price

HK$9,500 HKD

Average Price

HK$2,385 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

45.5%

Price Spread

84.8%

30-Day Price Trend

-18.9%

30-Day Supply Change

-11.9%

Volatility (30d)

0.05

Price Range

Price per carat distribution across retailers

$424/ct

10th Percentile

$240

Median

$424

90th Percentile

$964

Score Distribution

2 diamonds scored across 1 quality tiers

Very Good

2 (100.0%)

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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