How much does a 1.00 to 1.49ct I FL natural radiant diamond cost?

As of September 2026, 1.00 to 1.49ct I FL natural radiant diamonds typically cost $3,114 AUD to $4,449 AUD, with a median price of $4,224 AUD. There are currently 17 diamonds matching this specification available across retailers.

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

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1.00 to 1.49ct I FL Natural Radiant

Quick answer

As of September 2026, there are 17 natural radiant diamonds with I colour and FL clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $3,114 AUD to $4,449 AUD, with a median of $4,224 AUD. At least 11 retailers stock this exact specification. Half of all listings fall between $3,183 AUD and $4,219 AUD per carat.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Radiant natural stones in the index: 2,765 USD per carat, +6.0% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

Lowest Price

$2,666 AUD

Highest Price

$5,125 AUD

Average Price

$3,992 AUD

Market Intelligence

Retailers Selling

Price Spread

28.2%

Price Range

Price per carat distribution across retailers

$2,640/ct

10th Percentile

$2,210

Median

$2,640

90th Percentile

$3,232

Score Distribution

17 diamonds scored across 3 quality tiers

Excellent

3 (17.6%)

Very Good

3 (17.6%)

Good

11 (64.7%)

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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