How much does a 0.50 to 0.74ct F SI1 natural cushion diamond cost?

As of October 2026, 0.50 to 0.74ct F SI1 natural cushion diamonds typically cost $676 AUD to $2,430 AUD, with a median price of $1,079 AUD. There are currently 212 diamonds matching this specification available across retailers.

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

About 28% of these diamonds are available at multiple retailers, with an average price spread of 85%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct F SI1 Natural Cushion

Quick answer

As of October 2026, there are 212 natural cushion diamonds with F colour and SI1 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run $676 AUD to $2,430 AUD, with a median of $1,079 AUD. At least 54 retailers stock this exact specification, and 28% of the stones appear at more than one of them, with an average price spread of 85%. Half of all listings fall between $1,374 AUD and $2,886 AUD per carat. The same specification in lab grown form lists at a median of about $982 AUD per carat. Over the last 30 days the median price moved -1.1% and the number of listings moved -0.8%.

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

212

Lowest Price

$450 AUD

Highest Price

$5,070 AUD

Average Price

$1,326 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

28.1%

Price Spread

85.0%

30-Day Price Trend

-1.1%

30-Day Supply Change

-0.8%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,249/ct

10th Percentile

$783

Median

$1,249

90th Percentile

$2,786

Score Distribution

554 diamonds scored across 4 quality tiers

Excellent

82 (14.8%)

Very Good

81 (14.6%)

Good

204 (36.8%)

Average

187 (33.8%)

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Consider Instead

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

F SI2SI2 inclusions are not visible without magnification

Save 10%

Lab-Grown F SI1Same specifications, lab-grown origin

Save 45%

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