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

As of October 2026, 2.00 to 2.99ct H SI1 natural round diamonds typically cost £8,897 GBP to £22,469 GBP, with a median price of £14,276 GBP. There are currently 1,037 diamonds matching this specification available across retailers.

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

About 38% of these diamonds are available at multiple retailers, with an average price spread of 39%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct H SI1 Natural Round

Quick answer

As of October 2026, there are 1,037 natural round diamonds with H colour and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run £8,897 GBP to £22,469 GBP, with a median of £14,276 GBP. At least 64 retailers stock this exact specification, and 38% of the stones appear at more than one of them, with an average price spread of 39%. Half of all listings fall between £4,646 GBP and £6,814 GBP per carat. The same specification in lab grown form lists at a median of about £1,052 GBP per carat. Over the last 30 days the median price moved -1.4% and the number of listings moved +10.7%.

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. 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

1,037

Lowest Price

£4,500 GBP

Highest Price

£42,577 GBP

Average Price

£15,183 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

38.1%

Price Spread

38.6%

30-Day Price Trend

-1.4%

30-Day Supply Change

+10.7%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$7,531/ct

10th Percentile

$5,084

Median

$7,531

90th Percentile

$10,627

Score Distribution

2.5K diamonds scored across 4 quality tiers

Excellent

165 (6.7%)

Very Good

667 (27.1%)

Good

507 (20.6%)

Average

1,123 (45.6%)

Find Your Diamond

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Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

H SI2SI2 inclusions are not visible without magnification

Save 22%

Lab-Grown H SI1Same specifications, lab-grown origin

Save 80%

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