How much does a 1.00 to 1.49ct I I1 natural cushion diamond cost?

As of November 2026, 1.00 to 1.49ct I I1 natural cushion diamonds typically cost HK$9,806 HKD to HK$26,503 HKD, with a median price of HK$14,343 HKD. There are currently 47 diamonds matching this specification available across retailers.

Where can I find the best price on a I I1 cushion diamond?

About 18% of these diamonds are available at multiple retailers, with an average price spread of 44%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct I I1 Natural Cushion

Quick answer

As of November 2026, there are 47 natural cushion diamonds with I colour and I1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run HK$9,806 HKD to HK$26,503 HKD, with a median of HK$14,343 HKD. At least 26 retailers stock this exact specification, and 18% of the stones appear at more than one of them, with an average price spread of 44%. Half of all listings fall between HK$10,118 HKD and HK$15,514 HKD per carat. Over the last 30 days the median price moved -3.0% and the number of listings moved +7.5%.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Cushion natural stones in the index: 2,881 USD per carat, -2.5% 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$6,073 HKD

Highest Price

HK$37,139 HKD

Average Price

HK$17,158 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

18.2%

Price Spread

43.9%

30-Day Price Trend

-3.0%

30-Day Supply Change

+7.5%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,567/ct

10th Percentile

$980

Median

$1,567

90th Percentile

$2,743

Score Distribution

183 diamonds scored across 4 quality tiers

Excellent

3 (1.6%)

Very Good

13 (7.1%)

Good

13 (7.1%)

Average

154 (84.2%)

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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