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

As of September 2026, 3.00 to 4.99ct H SI2 lab grown round diamonds typically cost €905 EUR to €51,279 EUR, with a median price of €20,731 EUR. There are currently 70 diamonds matching this specification available across retailers.

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

Compare prices across retailers on Carat Hunter to see all your options.

3.00 to 4.99ct H SI2 Lab Grown Round

Quick answer

As of September 2026, there are 70 lab grown round diamonds with H colour and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run €905 EUR to €51,279 EUR, with a median of €20,731 EUR. At least 25 retailers stock this exact specification. Half of all listings fall between €2,981 EUR and €9,916 EUR per carat. The same specification in natural form lists at a median of about €8,807 EUR per carat.

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

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Round lab grown stones in the index: 438 USD per carat, -14.1% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

Lowest Price

€468 EUR

Highest Price

€87,889 EUR

Average Price

€24,877 EUR

Market Intelligence

Retailers Selling

Price Spread

99.3%

Price Range

Price per carat distribution across retailers

$8,094/ct

10th Percentile

$600

Median

$8,094

90th Percentile

$14,429

Score Distribution

70 diamonds scored across 4 quality tiers

Excellent

1 (1.4%)

Very Good

21 (30.0%)

Good

21 (30.0%)

Average

27 (38.6%)

Find Your Diamond

Search 70 H SI2 round diamonds and compare prices.

Search Diamonds

Consider Instead

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

H I1I1 inclusions are not visible without magnification

Save 49%

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