How much does a 0.20 to 0.49ct F SI1 natural cushion diamond cost?

As of October 2026, 0.20 to 0.49ct F SI1 natural cushion diamonds typically cost $510 NZD to $1,313 NZD, with a median price of $798 NZD. There are currently 110 diamonds matching this specification available across retailers.

Where can I find the best price on a F SI1 cushion diamond?

About 38% of these diamonds are available at multiple retailers, with an average price spread of 40%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct F SI1 Natural Cushion

Quick answer

As of October 2026, there are 110 natural cushion diamonds with F colour and SI1 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run $510 NZD to $1,313 NZD, with a median of $798 NZD. At least 11 retailers stock this exact specification, and 38% of the stones appear at more than one of them, with an average price spread of 40%. Half of all listings fall between $2,192 NZD and $3,158 NZD per carat. Over the last 30 days the median price moved -0.5% and the number of listings moved +0.6%.

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

110

Lowest Price

$327 NZD

Highest Price

$2,942 NZD

Average Price

$862 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

37.5%

Price Spread

40.0%

30-Day Price Trend

-0.5%

30-Day Supply Change

+0.6%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,360/ct

10th Percentile

$894

Median

$1,360

90th Percentile

$2,221

Score Distribution

266 diamonds scored across 4 quality tiers

Excellent

62 (23.3%)

Very Good

39 (14.7%)

Good

106 (39.8%)

Average

59 (22.2%)

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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