How much does a 0.20 to 0.49ct F SI2 natural radiant diamond cost?

As of October 2026, 0.20 to 0.49ct F SI2 natural radiant diamonds typically cost €235 EUR to €737 EUR, with a median price of €450 EUR. There are currently 30 diamonds matching this specification available across retailers.

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

About 19% of these diamonds are available at multiple retailers, with an average price spread of 40%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct F SI2 Natural Radiant

Quick answer

As of October 2026, there are 30 natural radiant diamonds with F colour and SI2 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run €235 EUR to €737 EUR, with a median of €450 EUR. At least 33 retailers stock this exact specification, and 19% of the stones appear at more than one of them, with an average price spread of 40%. Half of all listings fall between €1,036 EUR and €1,541 EUR per carat. The same specification in lab grown form lists at a median of about €693 EUR per carat. Over the last 30 days the median price moved -2.0% and the number of listings moved -0.9%.

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

€196 EUR

Highest Price

€1,267 EUR

Average Price

€481 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

18.8%

Price Spread

40.3%

30-Day Price Trend

-2.0%

30-Day Supply Change

-0.9%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$1,395/ct

10th Percentile

$941

Median

$1,395

90th Percentile

$2,215

Score Distribution

84 diamonds scored across 4 quality tiers

Excellent

11 (13.1%)

Very Good

12 (14.3%)

Good

17 (20.2%)

Average

44 (52.4%)

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Consider Instead

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

F I1I1 inclusions are not visible without magnification

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Lab-Grown F SI2Same specifications, lab-grown origin

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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