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

As of September 2026, 3.00 to 4.99ct H SI2 lab grown radiant diamonds typically cost HK$99,357 HKD to HK$480,235 HKD, with a median price of HK$381,542 HKD. There are currently 13 diamonds matching this specification available across retailers.

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

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

3.00 to 4.99ct H SI2 Lab Grown Radiant

Quick answer

As of September 2026, there are 13 lab grown radiant diamonds with H colour and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run HK$99,357 HKD to HK$480,235 HKD, with a median of HK$381,542 HKD. At least 3 retailers stock this exact specification. Half of all listings fall between HK$17,624 HKD and HK$115,518 HKD per carat. The same specification in natural form lists at a median of about HK$72,109 HKD 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. Radiant lab grown stones in the index: 473 USD per carat, -12.5% 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

HK$33,033 HKD

Highest Price

HK$563,137 HKD

Average Price

HK$347,513 HKD

Market Intelligence

Retailers Selling

Price Spread

105.0%

Price Range

Price per carat distribution across retailers

$11,882/ct

10th Percentile

$2,047

Median

$11,882

90th Percentile

$15,399

Score Distribution

13 diamonds scored across 2 quality tiers

Good

4 (30.8%)

Average

9 (69.2%)

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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