How much does a 0.20 to 0.49ct H I1 natural round diamond cost?

As of October 2026, 0.20 to 0.49ct H I1 natural round diamonds typically cost $249 AUD to $974 AUD, with a median price of $647 AUD. There are currently 735 diamonds matching this specification available across retailers.

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

About 23% of these diamonds are available at multiple retailers, with an average price spread of 81%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct H I1 Natural Round

Quick answer

As of October 2026, there are 735 natural round diamonds with H colour and I1 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run $249 AUD to $974 AUD, with a median of $647 AUD. At least 17 retailers stock this exact specification, and 23% of the stones appear at more than one of them, with an average price spread of 81%. Half of all listings fall between $902 AUD and $1,999 AUD per carat. The same specification in lab grown form lists at a median of about $727 AUD per carat. Over the last 30 days the median price moved 0.0% and the number of listings moved -2.2%.

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

735

Lowest Price

$67 AUD

Highest Price

$2,450 AUD

Average Price

$655 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

22.6%

Price Spread

81.4%

30-Day Price Trend

0.0%

30-Day Supply Change

-2.2%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$946/ct

10th Percentile

$406

Median

$946

90th Percentile

$1,836

Score Distribution

1.3K diamonds scored across 4 quality tiers

Excellent

128 (9.6%)

Very Good

217 (16.3%)

Good

302 (22.7%)

Average

681 (51.3%)

Find Your Diamond

Search 735 H I1 round diamonds and compare prices.

Search Diamonds

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