How much does a 5.00ct+ F SI1 natural oval diamond cost?

As of October 2026, 5.00ct+ F SI1 natural oval diamonds typically cost £58,769 GBP to £161,569 GBP, with a median price of £101,395 GBP. There are currently 20 diamonds matching this specification available across retailers.

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

Compare prices across retailers on Carat Hunter to see all your options.

5.00ct+ F SI1 Natural Oval

Quick answer

As of October 2026, there are 20 natural oval diamonds with F colour and SI1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run £58,769 GBP to £161,569 GBP, with a median of £101,395 GBP. The same specification in lab grown form lists at a median of about £218 GBP per carat.

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

Lowest Price

£54,061 GBP

Highest Price

£268,673 GBP

Average Price

£109,284 GBP

Score Distribution

71 diamonds scored across 4 quality tiers

Excellent

9 (12.7%)

Very Good

16 (22.5%)

Good

18 (25.4%)

Average

28 (39.4%)

Find Your Diamond

Search 20 F SI1 oval diamonds and compare prices.

Search Diamonds

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