How much does a 0.20 to 0.49ct G I1 natural radiant diamond cost?

As of October 2026, 0.20 to 0.49ct G I1 natural radiant diamonds typically cost £290 GBP to £488 GBP, with a median price of £377 GBP. There are currently 3 diamonds matching this specification available across retailers.

Where can I find the best price on a G I1 radiant diamond?

About 3% of these diamonds are available at multiple retailers, with an average price spread of 27%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct G I1 Natural Radiant

Quick answer

As of October 2026, there are 3 natural radiant diamonds with G colour and I1 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run £290 GBP to £488 GBP, with a median of £377 GBP. At least 14 retailers stock this exact specification, and 3% of the stones appear at more than one of them, with an average price spread of 27%. Half of all listings fall between £857 GBP and £1,122 GBP per carat. Over the last 30 days the median price moved 0.0% and the number of listings moved -5.3%.

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

£114 GBP

Highest Price

£658 GBP

Average Price

£376 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

2.7%

Price Spread

26.7%

30-Day Price Trend

0.0%

30-Day Supply Change

-5.3%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$1,329/ct

10th Percentile

$985

Median

$1,329

90th Percentile

$1,644

Score Distribution

33 diamonds scored across 4 quality tiers

Excellent

1 (3.0%)

Very Good

2 (6.1%)

Good

4 (12.1%)

Average

26 (78.8%)

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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