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

As of November 2026, 1.00 to 1.49ct J I1 natural cushion diamonds typically cost HK$9,648 HKD to HK$21,379 HKD, with a median price of HK$12,671 HKD. There are currently 27 diamonds matching this specification available across retailers.

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

About 10% of these diamonds are available at multiple retailers, with an average price spread of 17%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct J I1 Natural Cushion

Quick answer

As of November 2026, there are 27 natural cushion diamonds with J colour and I1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run HK$9,648 HKD to HK$21,379 HKD, with a median of HK$12,671 HKD. At least 20 retailers stock this exact specification, and 10% of the stones appear at more than one of them, with an average price spread of 17%. Half of all listings fall between HK$9,526 HKD and HK$11,248 HKD per carat. Over the last 30 days the median price moved -0.0% and the number of listings moved +2.7%.

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$7,276 HKD

Highest Price

HK$32,641 HKD

Average Price

HK$14,634 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

10.4%

Price Spread

16.8%

30-Day Price Trend

-0.0%

30-Day Supply Change

+2.7%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$1,310/ct

10th Percentile

$1,096

Median

$1,310

90th Percentile

$1,797

Score Distribution

165 diamonds scored across 4 quality tiers

Excellent

2 (1.2%)

Very Good

10 (6.1%)

Good

9 (5.5%)

Average

144 (87.3%)

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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