How much does a 3.00 to 4.99ct D I1 natural round diamond cost?

As of October 2026, 3.00 to 4.99ct D I1 natural round diamonds typically cost £14,341 GBP to £54,872 GBP, with a median price of £28,677 GBP. There are currently 18 diamonds matching this specification available across retailers.

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

About 17% of these diamonds are available at multiple retailers, with an average price spread of 69%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct D I1 Natural Round

Quick answer

As of October 2026, there are 18 natural round diamonds with D colour and I1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £14,341 GBP to £54,872 GBP, with a median of £28,677 GBP. At least 23 retailers stock this exact specification, and 17% of the stones appear at more than one of them, with an average price spread of 69%. Half of all listings fall between £5,390 GBP and £10,835 GBP per carat. Over the last 30 days the median price moved +3.6% and the number of listings moved -7.9%.

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

Lowest Price

£10,871 GBP

Highest Price

£69,876 GBP

Average Price

£31,099 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

16.8%

Price Spread

68.5%

30-Day Price Trend

+3.6%

30-Day Supply Change

-7.9%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$10,584/ct

10th Percentile

$5,755

Median

$10,584

90th Percentile

$18,960

Score Distribution

49 diamonds scored across 4 quality tiers

Excellent

4 (8.2%)

Very Good

11 (22.4%)

Good

5 (10.2%)

Average

29 (59.2%)

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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