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 $22,266 USD to $69,709 USD, with a median price of $40,415 USD. There are currently 844 diamonds matching this specification available across retailers.

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

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3.00 to 4.99ct H SI1 Natural Round

Quick answer

As of September 2026, there are 844 natural round diamonds with H color and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $22,266 USD to $69,709 USD, with a median of $40,415 USD. At least 56 retailers stock this exact specification. Half of all listings fall between $10,066 USD and $13,764 USD per carat. The same specification in lab grown form lists at a median of about $1,721 USD 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

844

Lowest Price

$12,058 USD

Highest Price

$495,014 USD

Average Price

$44,113 USD

Market Intelligence

Retailers Selling

Price Spread

30.9%

Price Range

Price per carat distribution across retailers

$11,956/ct

10th Percentile

$7,630

Median

$11,956

90th Percentile

$15,461

Score Distribution

844 diamonds scored across 4 quality tiers

Excellent

137 (16.2%)

Very Good

224 (26.5%)

Good

286 (33.9%)

Average

197 (23.3%)

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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