How much does a 2.00 to 2.99ct F SI1 natural round diamond cost?

As of October 2026, 2.00 to 2.99ct F SI1 natural round diamonds typically cost £11,491 GBP to £27,789 GBP, with a median price of £18,064 GBP. There are currently 477 diamonds matching this specification available across retailers.

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

About 33% of these diamonds are available at multiple retailers, with an average price spread of 33%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct F SI1 Natural Round

Quick answer

As of October 2026, there are 477 natural round diamonds with F colour and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run £11,491 GBP to £27,789 GBP, with a median of £18,064 GBP. At least 66 retailers stock this exact specification, and 33% of the stones appear at more than one of them, with an average price spread of 33%. Half of all listings fall between £6,059 GBP and £8,378 GBP per carat. The same specification in lab grown form lists at a median of about £273 GBP per carat. Over the last 30 days the median price moved -1.9% and the number of listings moved +12.6%.

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. Round natural stones in the index: 2,248 USD per carat, +7.6% 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

477

Lowest Price

£4,358 GBP

Highest Price

£48,121 GBP

Average Price

£18,745 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

32.7%

Price Spread

32.7%

30-Day Price Trend

-1.9%

30-Day Supply Change

+12.6%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$9,443/ct

10th Percentile

$6,910

Median

$9,443

90th Percentile

$12,985

Score Distribution

1.3K diamonds scored across 4 quality tiers

Excellent

71 (5.4%)

Very Good

322 (24.6%)

Good

268 (20.5%)

Average

648 (49.5%)

Find Your Diamond

Search 477 F SI1 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 SI2SI2 inclusions are not visible without magnification

Save 32%

Lab-Grown F SI1Same specifications, lab-grown origin

Save 96%

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