How much does a 1.00 to 1.49ct F SI1 natural cushion diamond cost?

As of November 2026, 1.00 to 1.49ct F SI1 natural cushion diamonds typically cost $2,260 AUD to $7,110 AUD, with a median price of $4,076 AUD. There are currently 495 diamonds matching this specification available across retailers.

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

About 34% of these diamonds are available at multiple retailers, with an average price spread of 60%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct F SI1 Natural Cushion

Quick answer

As of November 2026, there are 495 natural cushion diamonds with F colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $2,260 AUD to $7,110 AUD, with a median of $4,076 AUD. At least 62 retailers stock this exact specification, and 34% of the stones appear at more than one of them, with an average price spread of 60%. Half of all listings fall between $2,702 AUD and $4,895 AUD per carat. The same specification in lab grown form lists at a median of about $688 AUD per carat. Over the last 30 days the median price moved -1.0% and the number of listings moved +6.6%.

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: November 2026

Available

495

Lowest Price

$1,622 AUD

Highest Price

$14,796 AUD

Average Price

$4,468 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

34.0%

Price Spread

59.6%

30-Day Price Trend

-1.0%

30-Day Supply Change

+6.6%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$2,586/ct

10th Percentile

$1,578

Median

$2,586

90th Percentile

$4,472

Score Distribution

1.1K diamonds scored across 4 quality tiers

Excellent

199 (18.1%)

Very Good

248 (22.5%)

Good

233 (21.1%)

Average

422 (38.3%)

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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 15%

Lab-Grown F SI1Same specifications, lab-grown origin

Save 82%

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