How much does a 0.50 to 0.74ct G SI2 natural radiant diamond cost?

As of October 2026, 0.50 to 0.74ct G SI2 natural radiant diamonds typically cost £398 GBP to £1,078 GBP, with a median price of £688 GBP. There are currently 59 diamonds matching this specification available across retailers.

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

About 26% of these diamonds are available at multiple retailers, with an average price spread of 59%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct G SI2 Natural Radiant

Quick answer

As of October 2026, there are 59 natural radiant diamonds with G colour and SI2 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run £398 GBP to £1,078 GBP, with a median of £688 GBP. At least 51 retailers stock this exact specification, and 26% of the stones appear at more than one of them, with an average price spread of 59%. Half of all listings fall between £913 GBP and £1,583 GBP per carat. The same specification in lab grown form lists at a median of about £407 GBP per carat. Over the last 30 days the median price moved -0.1% and the number of listings moved +8.8%.

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

£213 GBP

Highest Price

£2,302 GBP

Average Price

£711 GBP