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

As of September 2026, 3.00 to 4.99ct H SI2 natural round diamonds typically cost $15,470 USD to $48,947 USD, with a median price of $25,409 USD. There are currently 1,101 diamonds matching this specification available across retailers.

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3.00 to 4.99ct H SI2 Natural Round

Quick answer

As of September 2026, there are 1,101 natural round diamonds with H color and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $15,470 USD to $48,947 USD, with a median of $25,409 USD. At least 47 retailers stock this exact specification. Half of all listings fall between $6,424 USD and $11,208 USD per carat. The same specification in lab grown form lists at a median of about $9,805 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

1,101

Lowest Price

$8,738 USD

Highest Price

$112,317 USD

Average Price

$29,567 USD

Market Intelligence

Retailers Selling

Price Spread

52.6%

Price Range

Price per carat distribution across retailers

$9,088/ct

10th Percentile

$5,160

Median

$9,088

90th Percentile

$13,084

Score Distribution

1.1K diamonds scored across 4 quality tiers

Excellent

288 (26.2%)

Very Good

391 (35.5%)

Good

257 (23.3%)

Average

165 (15.0%)

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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