How much does a 3.00 to 4.99ct G SI1 natural oval diamond cost?

As of October 2026, 3.00 to 4.99ct G SI1 natural oval diamonds typically cost £26,075 GBP to £71,095 GBP, with a median price of £39,539 GBP. There are currently 126 diamonds matching this specification available across retailers.

Where can I find the best price on a G SI1 oval diamond?

About 31% of these diamonds are available at multiple retailers, with an average price spread of 24%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct G SI1 Natural Oval

Quick answer

As of October 2026, there are 126 natural oval diamonds with G colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £26,075 GBP to £71,095 GBP, with a median of £39,539 GBP. At least 55 retailers stock this exact specification, and 31% of the stones appear at more than one of them, with an average price spread of 24%. Half of all listings fall between £10,306 GBP and £13,024 GBP per carat. The same specification in lab grown form lists at a median of about £303 GBP per carat. Over the last 30 days the median price moved +1.5% and the number of listings moved +9.7%.

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. Oval natural stones in the index: 2,655 USD per carat, +10.2% 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

126

Lowest Price

£15,315 GBP

Highest Price

£120,269 GBP

Average Price

£45,578 GBP