How much does a 1.00 to 1.49ct J SI2 natural cushion diamond cost?

As of September 2026, 1.00 to 1.49ct J SI2 natural cushion diamonds typically cost HK$8,321 HKD to HK$24,727 HKD, with a median price of HK$14,673 HKD. There are currently 610 diamonds matching this specification available across retailers.

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

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1.00 to 1.49ct J SI2 Natural Cushion

Quick answer

As of September 2026, there are 610 natural cushion diamonds with J colour and SI2 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run HK$8,321 HKD to HK$24,727 HKD, with a median of HK$14,673 HKD. At least 45 retailers stock this exact specification. Half of all listings fall between HK$9,708 HKD and HK$18,657 HKD per carat. The same specification in lab grown form lists at a median of about HK$14,203 HKD per carat.

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

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Cushion natural stones in the index: 2,792 USD per carat, +1.1% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

610

Lowest Price

HK$5,891 HKD

Highest Price

HK$53,970 HKD

Average Price

HK$16,034 HKD

Market Intelligence

Retailers Selling

Price Spread

68.7%

Price Range

Price per carat distribution across retailers

$1,660/ct

10th Percentile

$956

Median

$1,660

90th Percentile

$2,865

Score Distribution

610 diamonds scored across 4 quality tiers

Excellent

37 (6.1%)

Very Good

121 (19.8%)

Good

202 (33.1%)

Average

250 (41.0%)

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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