How much does a 0.50 to 0.74ct F SI2 natural cushion diamond cost?

As of October 2026, 0.50 to 0.74ct F SI2 natural cushion diamonds typically cost $554 AUD to $2,138 AUD, with a median price of $912 AUD. There are currently 145 diamonds matching this specification available across retailers.

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

About 28% of these diamonds are available at multiple retailers, with an average price spread of 78%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct F SI2 Natural Cushion

Quick answer

As of October 2026, there are 145 natural cushion diamonds with F colour and SI2 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run $554 AUD to $2,138 AUD, with a median of $912 AUD. At least 44 retailers stock this exact specification, and 28% of the stones appear at more than one of them, with an average price spread of 78%. Half of all listings fall between $1,236 AUD and $2,481 AUD per carat. The same specification in lab grown form lists at a median of about $1,157 AUD per carat. Over the last 30 days the median price moved -1.0% 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

145

Lowest Price

$444 AUD

Highest Price

$4,738 AUD

Average Price

$1,144 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

28.1%

Price Spread

77.7%

30-Day Price Trend

-1.0%

30-Day Supply Change

-0.8%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,125/ct

10th Percentile

$677

Median

$1,125

90th Percentile

$2,357

Score Distribution

375 diamonds scored across 4 quality tiers

Excellent

55 (14.7%)

Very Good

88 (23.5%)

Good

121 (32.3%)

Average

111 (29.6%)

Find Your Diamond

Search 145 F 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.

F I1I1 inclusions are not visible without magnification

Save 12%

Lab-Grown F SI2Same specifications, lab-grown origin

Save 28%

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