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

As of November 2026, 1.00 to 1.49ct I FL natural radiant diamonds typically cost £1,466 GBP to £2,111 GBP, with a median price of £2,007 GBP. There are currently 3 diamonds matching this specification available across retailers.

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

About 15% of these diamonds are available at multiple retailers, with an average price spread of 30%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct I FL Natural Radiant

Quick answer

As of November 2026, there are 3 natural radiant diamonds with I colour and FL clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £1,466 GBP to £2,111 GBP, with a median of £2,007 GBP. At least 12 retailers stock this exact specification, and 15% of the stones appear at more than one of them, with an average price spread of 30%. Half of all listings fall between £1,477 GBP and £1,997 GBP per carat. Over the last 30 days the median price moved +1.7% and the number of listings moved +17.1%.

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: November 2026

Available

Lowest Price

£1,403 GBP

Highest Price

£2,374 GBP

Average Price

£1,897 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

15.0%

Price Spread

30.2%

30-Day Price Trend

+1.7%

30-Day Supply Change

+17.1%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$2,303/ct

10th Percentile

$1,939

Median

$2,303

90th Percentile

$2,973

Score Distribution

14 diamonds scored across 3 quality tiers

Excellent

5 (35.7%)

Very Good

8 (57.1%)

Good

1 (7.1%)

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J FLJ colour is visually identical to I to the naked eye

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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