How much does a 3.00 to 4.99ct H I1 natural radiant diamond cost?

As of November 2026, 3.00 to 4.99ct H I1 natural radiant diamonds typically cost £25,587 GBP to £75,347 GBP, with a median price of £36,322 GBP. There are currently 3 diamonds matching this specification available across retailers.

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

About 2% of these diamonds are available at multiple retailers, with an average price spread of 14%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct H I1 Natural Radiant

Quick answer

As of November 2026, there are 3 natural radiant diamonds with H colour and I1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £25,587 GBP to £75,347 GBP, with a median of £36,322 GBP. At least 13 retailers stock this exact specification, and 2% of the stones appear at more than one of them, with an average price spread of 14%. Half of all listings fall between £4,803 GBP and £5,567 GBP per carat. Over the last 30 days the median price moved -2.6% and the number of listings moved +16.8%.

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. Radiant natural stones in the index: 3,091 USD per carat, +13.2% 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: November 2026

Available

Lowest Price

£15,784 GBP

Highest Price

£100,954 GBP

Average Price

£48,497 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

1.8%

Price Spread

14.4%

30-Day Price Trend

-2.6%

30-Day Supply Change

+16.8%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$7,097/ct

10th Percentile

$6,145

Median

$7,097

90th Percentile

$10,133

Score Distribution

57 diamonds scored across 3 quality tiers

Very Good

3 (5.3%)

Good

1 (1.8%)

Average

53 (93.0%)

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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