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

As of September 2026, 3.00 to 4.99ct D I1 natural round diamonds typically cost $20,340 AUD to $76,282 AUD, with a median price of $39,658 AUD. There are currently 40 diamonds matching this specification available across retailers.

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

About 40% of these diamonds are available at multiple retailers, with an average price spread of 75%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct D I1 Natural Round

Quick answer

As of September 2026, there are 40 natural round diamonds with D colour and I1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $20,340 AUD to $76,282 AUD, with a median of $39,658 AUD. At least 20 retailers stock this exact specification, and 40% of the stones appear at more than one of them, with an average price spread of 75%. Half of all listings fall between $8,172 AUD and $17,209 AUD per carat. The same specification in lab grown form lists at a median of about $14,543 AUD per carat. Over the last 30 days the median price moved -21.6% and the number of listings moved -14.9%.

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

Lowest Price

$13,407 AUD

Highest Price

$129,733 AUD

Average Price

$44,909 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

39.6%

Price Spread

75.0%

30-Day Price Trend

-21.6%

30-Day Supply Change

-14.9%

Volatility (30d)

0.03

Price Range

Price per carat distribution across retailers

$8,641/ct

10th Percentile

$4,540

Median

$8,641

90th Percentile

$15,742

Score Distribution

40 diamonds scored across 4 quality tiers

Excellent

6 (15.0%)

Very Good

14 (35.0%)

Good

6 (15.0%)

Average

14 (35.0%)

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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