How much does a 1.00 to 1.49ct F SI2 natural round diamond cost?

As of September 2026, 1.00 to 1.49ct F SI2 natural round diamonds typically cost £1,246 GBP to £3,134 GBP, with a median price of £1,858 GBP. There are currently 6,895 diamonds matching this specification available across retailers.

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

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

1.00 to 1.49ct F SI2 Natural Round

Quick answer

As of September 2026, there are 6,895 natural round diamonds with F colour and SI2 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £1,246 GBP to £3,134 GBP, with a median of £1,858 GBP. At least 57 retailers stock this exact specification. Half of all listings fall between £1,569 GBP and £2,221 GBP per carat. The same specification in lab grown form lists at a median of about £1,972 GBP per carat.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Round natural stones in the index: 2,094 USD per carat, -3.8% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

6,895

Lowest Price

£353 GBP

Highest Price

£16,592 GBP

Average Price

£2,072 GBP

Market Intelligence

Retailers Selling

Price Spread

34.8%

Price Range

Price per carat distribution across retailers

$2,529/ct

10th Percentile

$1,800

Median

$2,529

90th Percentile

$3,715

Score Distribution

6.9K diamonds scored across 4 quality tiers

Excellent

1,620 (23.5%)

Very Good

2,141 (31.1%)

Good

1,760 (25.5%)

Average

1,374 (19.9%)

Find Your Diamond

Search 6,895 F SI2 round diamonds and compare prices.

Search Diamonds

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

Save 13%

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