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

As of October 2026, 3.00 to 4.99ct G I1 natural round diamonds typically cost $18,058 AUD to $84,039 AUD, with a median price of $50,972 AUD. There are currently 34 diamonds matching this specification available across retailers.

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

About 24% of these diamonds are available at multiple retailers, with an average price spread of 80%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct G I1 Natural Round

Quick answer

As of October 2026, there are 34 natural round diamonds with G colour and I1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $18,058 AUD to $84,039 AUD, with a median of $50,972 AUD. At least 27 retailers stock this exact specification, and 24% of the stones appear at more than one of them, with an average price spread of 80%. Half of all listings fall between $5,947 AUD and $13,843 AUD per carat. The same specification in lab grown form lists at a median of about $308 AUD per carat. Over the last 30 days the median price moved -3.5% and the number of listings moved +4.5%.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, September 2026: natural diamonds at 2,335 USD per carat and lab-grown at 443 USD per carat, a natural to lab ratio of 5.3 to 1. Round natural stones in the index: 2,248 USD per carat, +7.6% month on month. See the full index release

Figures come from current listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: October 2026

Available

Lowest Price

$5,566 AUD

Highest Price

$122,030 AUD

Average Price

$50,996 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

23.8%

Price Spread

80.0%

30-Day Price Trend

-3.5%

30-Day Supply Change

+4.5%

Volatility (30d)

0.04

Price Range

Price per carat distribution across retailers

$6,932/ct

10th Percentile

$2,644

Median

$6,932

90th Percentile

$13,137

Score Distribution

149 diamonds scored across 4 quality tiers

Excellent

10 (6.7%)

Very Good

28 (18.8%)

Good

10 (6.7%)

Average

101 (67.8%)

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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