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$8,320 HKD to HK$24,729 HKD, with a median price of HK$14,673 HKD. There are currently 608 diamonds matching this specification available across retailers.

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

Compare prices across retailers on Carat Hunter to see all your options.

1.00 to 1.49ct J SI2 Natural Cushion

Quick answer

As of September 2026, there are 608 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$8,320 HKD to HK$24,729 HKD, with a median of HK$14,673 HKD. At least 45 retailers stock this exact specification. Half of all listings fall between HK$9,884 HKD and HK$18,889 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

608

Lowest Price

HK$5,891 HKD

Highest Price

HK$53,970 HKD

Average Price

HK$16,038 HKD

Market Intelligence

Retailers Selling

Price Spread

67.8%

Price Range

Price per carat distribution across retailers

$1,694/ct

10th Percentile

$998

Median

$1,694

90th Percentile

$2,884

Score Distribution

608 diamonds scored across 4 quality tiers

Excellent

37 (6.1%)

Very Good

121 (19.9%)

Good

200 (32.9%)

Average

250 (41.1%)

Find Your Diamond

Search 608 J 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.

J I1I1 inclusions are not visible without magnification

Save 21%

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