How much does a 3.00 to 4.99ct F SI1 natural radiant diamond cost?

As of October 2026, 3.00 to 4.99ct F SI1 natural radiant diamonds typically cost $55,130 AUD to $125,415 AUD, with a median price of $80,025 AUD. There are currently 75 diamonds matching this specification available across retailers.

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

About 28% of these diamonds are available at multiple retailers, with an average price spread of 26%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct F SI1 Natural Radiant

Quick answer

As of October 2026, there are 75 natural radiant diamonds with F colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $55,130 AUD to $125,415 AUD, with a median of $80,025 AUD. At least 52 retailers stock this exact specification, and 28% of the stones appear at more than one of them, with an average price spread of 26%. Half of all listings fall between $17,667 AUD and $22,924 AUD per carat. The same specification in lab grown form lists at a median of about $546 AUD per carat. Over the last 30 days the median price moved -0.8% and the number of listings moved +12.2%.

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. Radiant natural stones in the index: 3,091 USD per carat, +13.2% 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

Lowest Price

$36,660 AUD

Highest Price

$210,813 AUD

Average Price

$88,678 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

28.4%

Price Spread

26.0%

30-Day Price Trend

-0.8%

30-Day Supply Change

+12.2%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$14,206/ct

10th Percentile

$10,941

Median

$14,206

90th Percentile

$18,050

Score Distribution

234 diamonds scored across 4 quality tiers

Excellent

25 (10.7%)

Very Good

55 (23.5%)

Good

38 (16.2%)

Average

116 (49.6%)

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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 23%

Lab-Grown F SI1Same specifications, lab-grown origin

Save 97%

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