How much does a 3.00 to 4.99ct I I1 natural round diamond cost?

As of September 2026, 3.00 to 4.99ct I I1 natural round diamonds typically cost $12,037 USD to $40,889 USD, with a median price of $21,173 USD. There are currently 127 diamonds matching this specification available across retailers.

Where can I find the best price on a I I1 round diamond?

About 47% of these diamonds are available at multiple retailers, with an average price spread of 79%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct I I1 Natural Round

Quick answer

As of September 2026, there are 127 natural round diamonds with I color and I1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $12,037 USD to $40,889 USD, with a median of $21,173 USD. At least 23 retailers stock this exact specification, and 47% of the stones appear at more than one of them, with an average price spread of 79%. Half of all listings fall between $4,571 USD and $10,256 USD per carat. The same specification in lab grown form lists at a median of about $5,160 USD per carat. Over the last 30 days the median price moved -12.9% and the number of listings moved -16.0%.

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

127

Lowest Price

$5,283 USD

Highest Price

$83,334 USD

Average Price

$24,446 USD

Market Intelligence

Retailers Selling

Cross Retailer %

47.3%

Price Spread

78.7%

30-Day Price Trend

-12.9%

30-Day Supply Change

-16.0%

Volatility (30d)

0.03

Price Range

Price per carat distribution across retailers

$7,226/ct

10th Percentile

$2,714

Median

$7,226

90th Percentile

$12,210

Score Distribution

127 diamonds scored across 4 quality tiers

Excellent

11 (8.7%)

Very Good

47 (37.0%)

Good

26 (20.5%)

Average

43 (33.9%)

Find Your Diamond

Search 127 I I1 round diamonds and compare prices.

Search Diamonds

Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

Lab-Grown I I1Same specifications, lab-grown origin

Save 43%

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