How much does a 3.00 to 4.99ct H SI1 natural round diamond cost?

As of September 2026, 3.00 to 4.99ct H SI1 natural round diamonds typically cost HK$174,804 HKD to HK$549,492 HKD, with a median price of HK$318,871 HKD. There are currently 851 diamonds matching this specification available across retailers.

Where can I find the best price on a H SI1 round diamond?

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

3.00 to 4.99ct H SI1 Natural Round

Quick answer

As of September 2026, there are 851 natural round diamonds with H colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run HK$174,804 HKD to HK$549,492 HKD, with a median of HK$318,871 HKD. At least 56 retailers stock this exact specification. Half of all listings fall between HK$78,861 HKD and HK$107,869 HKD per carat. The same specification in lab grown form lists at a median of about HK$11,085 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. Round natural stones in the index: 2,094 USD per carat, -3.8% 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

851

Lowest Price

HK$94,586 HKD

Highest Price

HK$3,883,137 HKD

Average Price

HK$347,161 HKD

Market Intelligence

Retailers Selling

Price Spread

31.0%

Price Range

Price per carat distribution across retailers

$11,921/ct

10th Percentile

$7,630

Median

$11,921

90th Percentile

$15,462

Score Distribution

851 diamonds scored across 4 quality tiers

Excellent

140 (16.5%)

Very Good

221 (26.0%)

Good

286 (33.6%)

Average

204 (24.0%)

Find Your Diamond

Search 851 H SI1 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 SI2SI2 inclusions are not visible without magnification

Save 24%

Lab-Grown H SI1Same specifications, lab-grown origin

Save 86%

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