How much does a 1.50 to 1.99ct H SI1 lab grown radiant diamond cost?

As of October 2026, 1.50 to 1.99ct H SI1 lab grown radiant diamonds typically cost HK$4,101 HKD to HK$21,809 HKD, with a median price of HK$7,606 HKD. There are currently 36 diamonds matching this specification available across retailers.

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

About 20% of these diamonds are available at multiple retailers, with an average price spread of 90%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct H SI1 Lab Grown Radiant

Quick answer

As of October 2026, there are 36 lab grown radiant diamonds with H colour and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run HK$4,101 HKD to HK$21,809 HKD, with a median of HK$7,606 HKD. At least 21 retailers stock this exact specification, and 20% of the stones appear at more than one of them, with an average price spread of 90%. Half of all listings fall between HK$5,202 HKD and HK$12,725 HKD per carat. The same specification in natural form lists at a median of about HK$35,094 HKD per carat. Over the last 30 days the median price moved +1.4% and the number of listings moved +7.1%.

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. Radiant lab grown stones in the index: 474 USD per carat, -2.1% 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$2,785 HKD

Highest Price

HK$48,766 HKD

Average Price

HK$10,831 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

20.0%

Price Spread

90.0%

30-Day Price Trend

+1.4%

30-Day Supply Change

+7.1%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,065/ct

10th Percentile

$402

Median

$1,065

90th Percentile

$2,070

Score Distribution

78 diamonds scored across 4 quality tiers

Excellent

14 (17.9%)

Very Good

23 (29.5%)

Good

24 (30.8%)

Average

17 (21.8%)

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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