How much does a 3.00 to 4.99ct H SI2 lab grown radiant diamond cost?

As of November 2026, 3.00 to 4.99ct H SI2 lab grown radiant diamonds typically cost €2,558 EUR to €3,794 EUR, with a median price of €3,067 EUR. There are currently 1 diamonds matching this specification available across retailers.

Where can I find the best price on a H SI2 radiant diamond?

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3.00 to 4.99ct H SI2 Lab Grown Radiant

Quick answer

As of November 2026, there are 1 lab grown radiant diamonds with H color and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run €2,558 EUR to €3,794 EUR, with a median of €3,067 EUR. The same specification in natural form lists at a median of about €7,736 EUR per carat.

Three of the best scored stones at this specification right now:

4.00ct Radiant H SI2, IGI, grade B, from €2,430 EUR

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: November 2026

Available

Lowest Price

€2,430 EUR

Highest Price

€3,975 EUR

Average Price

€3,158 EUR

Score Distribution

3 diamonds scored across 2 quality tiers

Good

1 (33.3%)

Average

2 (66.7%)

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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