How much does a 2.00 to 2.99ct I I1 natural round diamond cost?

As of October 2026, 2.00 to 2.99ct I I1 natural round diamonds typically cost £5,307 GBP to £15,783 GBP, with a median price of £9,290 GBP. There are currently 247 diamonds matching this specification available across retailers.

Where can I find the best price on a I I1 round diamond?

About 29% of these diamonds are available at multiple retailers, with an average price spread of 54%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct I I1 Natural Round

Quick answer

As of October 2026, there are 247 natural round diamonds with I colour and I1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run £5,307 GBP to £15,783 GBP, with a median of £9,290 GBP. At least 31 retailers stock this exact specification, and 29% of the stones appear at more than one of them, with an average price spread of 54%. Half of all listings fall between £2,756 GBP and £4,795 GBP per carat. The same specification in lab grown form lists at a median of about £1,965 GBP per carat. Over the last 30 days the median price moved -3.3% and the number of listings moved +7.1%.

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

247

Lowest Price

£1,878 GBP

Highest Price

£25,675 GBP

Average Price

£9,930 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

29.3%

Price Spread

53.8%

30-Day Price Trend

-3.3%

30-Day Supply Change

+7.1%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$5,080/ct

10th Percentile

$2,403

Median

$5,080

90th Percentile

$7,806

Score Distribution

750 diamonds scored across 4 quality tiers

Excellent

62 (8.3%)

Very Good

160 (21.3%)

Good

110 (14.7%)

Average

418 (55.7%)

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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