How much does a 3.00 to 4.99ct J SI2 natural cushion diamond cost?

As of November 2026, 3.00 to 4.99ct J SI2 natural cushion diamonds typically cost $27,993 NZD to $113,865 NZD, with a median price of $48,858 NZD. There are currently 94 diamonds matching this specification available across retailers.

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

About 43% of these diamonds are available at multiple retailers, with an average price spread of 48%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct J SI2 Natural Cushion

Quick answer

As of November 2026, there are 94 natural cushion diamonds with J colour and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $27,993 NZD to $113,865 NZD, with a median of $48,858 NZD. At least 43 retailers stock this exact specification, and 43% of the stones appear at more than one of them, with an average price spread of 48%. Half of all listings fall between $9,042 NZD and $14,737 NZD per carat. Over the last 30 days the median price moved +0.8% and the number of listings moved +15.7%.

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

Caratlytics Diamond Price Index, September 2026: natural diamonds at 2,335 USD per carat and lab-grown at 443 USD per carat, a natural to lab ratio of 5.3 to 1. Cushion natural stones in the index: 2,948 USD per carat, +1.7% 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

$18,681 NZD

Highest Price

$199,809 NZD

Average Price

$61,838 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

43.2%

Price Spread

48.0%

30-Day Price Trend

+0.8%

30-Day Supply Change

+15.7%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$6,683/ct

10th Percentile

$4,145

Median

$6,683

90th Percentile

$9,656

Score Distribution

216 diamonds scored across 4 quality tiers

Excellent

22 (10.2%)

Very Good

57 (26.4%)

Good

42 (19.4%)

Average

95 (44.0%)

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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