How much does a 3.00 to 4.99ct F SI2 natural radiant diamond cost?

As of October 2026, 3.00 to 4.99ct F SI2 natural radiant diamonds typically cost £21,384 GBP to £91,874 GBP, with a median price of £36,450 GBP. There are currently 41 diamonds matching this specification available across retailers.

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

About 26% of these diamonds are available at multiple retailers, with an average price spread of 33%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct F SI2 Natural Radiant

Quick answer

As of October 2026, there are 41 natural radiant diamonds with F colour and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £21,384 GBP to £91,874 GBP, with a median of £36,450 GBP. At least 45 retailers stock this exact specification, and 26% of the stones appear at more than one of them, with an average price spread of 33%. Half of all listings fall between £6,625 GBP and £9,330 GBP per carat. The same specification in lab grown form lists at a median of about £348 GBP 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

£12,153 GBP

Highest Price

£111,461 GBP

Average Price

£41,805 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

25.9%

Price Spread

33.0%

30-Day Price Trend

-0.8%

30-Day Supply Change

+12.2%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$10,890/ct

10th Percentile

$6,691

Median

$10,890

90th Percentile

$13,941

Score Distribution

152 diamonds scored across 4 quality tiers

Excellent

34 (22.4%)

Very Good

14 (9.2%)

Good

12 (7.9%)

Average

92 (60.5%)

Find Your Diamond

Search 41 F SI2 radiant diamonds and compare prices.

Search Diamonds

Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

Lab-Grown F SI2Same 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