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

As of September 2026, 3.00 to 4.99ct J SI1 natural round diamonds typically cost $16,907 USD to $50,793 USD, with a median price of $28,676 USD. There are currently 1,198 diamonds matching this specification available across retailers.

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

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

3.00 to 4.99ct J SI1 Natural Round

Quick answer

As of September 2026, there are 1,198 natural round diamonds with J color and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $16,907 USD to $50,793 USD, with a median of $28,676 USD. At least 51 retailers stock this exact specification. Half of all listings fall between $6,818 USD and $10,246 USD per carat. The same specification in lab grown form lists at a median of about $6,541 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

1,198

Lowest Price

$3,433 USD

Highest Price

$138,125 USD

Average Price

$31,787 USD

Market Intelligence

Retailers Selling

Price Spread

40.4%

Price Range

Price per carat distribution across retailers

$8,479/ct

10th Percentile

$5,474

Median

$8,479

90th Percentile

$11,939

Score Distribution

1.2K diamonds scored across 4 quality tiers

Excellent

170 (14.2%)

Very Good

363 (30.3%)

Good

365 (30.5%)

Average

300 (25.0%)

Find Your Diamond

Search 1,198 J 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.

J SI2SI2 inclusions are not visible without magnification

Save 10%

Lab-Grown J SI1Same specifications, lab-grown origin

Save 74%

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