How much does a 3.00 to 4.99ct H IF lab grown radiant diamond cost?

As of October 2026, 3.00 to 4.99ct H IF lab grown radiant diamonds typically cost £1,467 GBP to £7,881 GBP, with a median price of £4,393 GBP. There are currently 5 diamonds matching this specification available across retailers.

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

About 33% of these diamonds are available at multiple retailers, with an average price spread of 61%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct H IF Lab Grown Radiant

Quick answer

As of October 2026, there are 5 lab grown radiant diamonds with H colour and IF clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £1,467 GBP to £7,881 GBP, with a median of £4,393 GBP. At least 21 retailers stock this exact specification, and 33% of the stones appear at more than one of them, with an average price spread of 61%. Half of all listings fall between £750 GBP and £1,380 GBP per carat. Over the last 30 days the median price moved -5.5% and the number of listings moved +24.3%.

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 lab grown stones in the index: 474 USD per carat, -2.1% 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

£1,048 GBP

Highest Price

£16,479 GBP

Average Price

£4,711 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

33.3%

Price Spread

61.2%

30-Day Price Trend

-5.5%

30-Day Supply Change

+24.3%

Volatility (30d)

0.04

Price Range

Price per carat distribution across retailers

$1,381/ct

10th Percentile

$665

Median

$1,381

90th Percentile

$2,719

Score Distribution

15 diamonds scored across 4 quality tiers

Excellent

4 (26.7%)

Very Good

3 (20.0%)

Good

3 (20.0%)

Average

5 (33.3%)

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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