How much does a 1.50 to 1.99ct F SI2 natural cushion diamond cost?

As of October 2026, 1.50 to 1.99ct F SI2 natural cushion diamonds typically cost $5,601 NZD to $17,142 NZD, with a median price of $10,432 NZD. There are currently 197 diamonds matching this specification available across retailers.

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

About 32% of these diamonds are available at multiple retailers, with an average price spread of 55%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct F SI2 Natural Cushion

Quick answer

As of October 2026, there are 197 natural cushion diamonds with F colour and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $5,601 NZD to $17,142 NZD, with a median of $10,432 NZD. At least 54 retailers stock this exact specification, and 32% of the stones appear at more than one of them, with an average price spread of 55%. Half of all listings fall between $4,772 NZD and $8,176 NZD per carat. The same specification in lab grown form lists at a median of about $937 NZD per carat. Over the last 30 days the median price moved -2.6% and the number of listings moved +5.3%.

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: October 2026

Available

197

Lowest Price

$3,020 NZD

Highest Price

$35,553 NZD

Average Price

$11,136 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

31.6%

Price Spread

54.8%

30-Day Price Trend

-2.6%

30-Day Supply Change

+5.3%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$3,487/ct

10th Percentile

$2,187

Median

$3,487

90th Percentile

$5,749

Score Distribution

524 diamonds scored across 4 quality tiers

Excellent

106 (20.2%)

Very Good

122 (23.3%)

Good

116 (22.1%)

Average

180 (34.4%)

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Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

Lab-Grown F SI2Same specifications, lab-grown origin

Save 85%

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