How much does a 1.50 to 1.99ct H SI2 natural cushion diamond cost?

As of October 2026, 1.50 to 1.99ct H SI2 natural cushion diamonds typically cost HK$22,864 HKD to HK$62,406 HKD, with a median price of HK$40,547 HKD. There are currently 313 diamonds matching this specification available across retailers.

Where can I find the best price on a H SI2 cushion diamond?

About 34% of these diamonds are available at multiple retailers, with an average price spread of 56%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct H SI2 Natural Cushion

Quick answer

As of October 2026, there are 313 natural cushion diamonds with H colour and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run HK$22,864 HKD to HK$62,406 HKD, with a median of HK$40,547 HKD. At least 54 retailers stock this exact specification, and 34% of the stones appear at more than one of them, with an average price spread of 56%. Half of all listings fall between HK$19,173 HKD and HK$33,201 HKD per carat. The same specification in lab grown form lists at a median of about HK$4,682 HKD per carat. Over the last 30 days the median price moved -1.7% and the number of listings moved +7.4%.

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. Cushion natural stones in the index: 2,948 USD per carat, +1.7% 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

313

Lowest Price

HK$11,933 HKD

Highest Price

HK$144,917 HKD

Average Price

HK$42,582 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

33.9%

Price Spread

55.6%

30-Day Price Trend

-1.7%

30-Day Supply Change

+7.4%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$3,215/ct

10th Percentile

$1,984

Median

$3,215

90th Percentile

$5,193

Score Distribution

883 diamonds scored across 4 quality tiers

Excellent

150 (17.0%)

Very Good

185 (21.0%)

Good

210 (23.8%)

Average

338 (38.3%)

Find Your Diamond

Search 313 H SI2 cushion diamonds and compare prices.

Search Diamonds

Consider Instead

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

H I1I1 inclusions are not visible without magnification

Save 5%

Lab-Grown H SI2Same specifications, lab-grown origin

Save 81%

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