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 $1,856 NZD to $5,483 NZD, with a median price of $3,278 NZD. There are currently 612 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 612 natural cushion diamonds with J colour and SI2 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $1,856 NZD to $5,483 NZD, with a median of $3,278 NZD. At least 45 retailers stock this exact specification. Half of all listings fall between $2,142 NZD and $4,096 NZD per carat. The same specification in lab grown form lists at a median of about $3,145 NZD 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

612

Lowest Price

$1,304 NZD

Highest Price

$11,950 NZD

Average Price

$3,560 NZD

Market Intelligence

Retailers Selling

Price Spread

67.9%

Price Range

Price per carat distribution across retailers

$1,658/ct

10th Percentile

$958

Median

$1,658

90th Percentile

$2,858

Score Distribution

612 diamonds scored across 4 quality tiers

Excellent

41 (6.7%)

Very Good

114 (18.6%)

Good

201 (32.8%)

Average

256 (41.8%)

Find Your Diamond

Search 612 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 20%

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