How much does a 1.50 to 1.99ct H SI1 natural round diamond cost?

As of October 2026, 1.50 to 1.99ct H SI1 natural round diamonds typically cost HK$39,468 HKD to HK$113,153 HKD, with a median price of HK$65,063 HKD. There are currently 1,982 diamonds matching this specification available across retailers.

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

About 40% of these diamonds are available at multiple retailers, with an average price spread of 47%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct H SI1 Natural Round

Quick answer

As of October 2026, there are 1,982 natural round diamonds with H colour and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run HK$39,468 HKD to HK$113,153 HKD, with a median of HK$65,063 HKD. At least 68 retailers stock this exact specification, and 40% of the stones appear at more than one of them, with an average price spread of 47%. Half of all listings fall between HK$29,224 HKD and HK$46,509 HKD per carat. The same specification in lab grown form lists at a median of about HK$8,260 HKD per carat. Over the last 30 days the median price moved -2.2% and the number of listings moved +17.0%.

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. Round natural stones in the index: 2,248 USD per carat, +7.6% 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

1,982

Lowest Price

HK$21,760 HKD

Highest Price

HK$182,364 HKD

Average Price

HK$71,326 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

40.4%

Price Spread

47.0%

30-Day Price Trend

-2.2%

30-Day Supply Change

+17.0%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$4,692/ct

10th Percentile

$3,006

Median

$4,692

90th Percentile

$7,503

Score Distribution

4.4K diamonds scored across 4 quality tiers

Excellent

474 (10.9%)

Very Good

1,180 (27.0%)

Good

1,012 (23.2%)

Average

1,697 (38.9%)

Find Your Diamond

Search 1,982 H SI1 round diamonds and compare prices.

Search Diamonds

Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

H SI2SI2 inclusions are not visible without magnification

Save 20%

Lab-Grown H SI1Same specifications, lab-grown origin

Save 78%

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