How much does a 2.00 to 2.99ct H SI1 natural round diamond cost?

As of October 2026, 2.00 to 2.99ct H SI1 natural round diamonds typically cost $17,020 AUD to $42,852 AUD, with a median price of $27,272 AUD. There are currently 1,032 diamonds matching this specification available across retailers.

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

About 39% of these diamonds are available at multiple retailers, with an average price spread of 39%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct H SI1 Natural Round

Quick answer

As of October 2026, there are 1,032 natural round diamonds with H colour and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run $17,020 AUD to $42,852 AUD, with a median of $27,272 AUD. At least 65 retailers stock this exact specification, and 39% of the stones appear at more than one of them, with an average price spread of 39%. Half of all listings fall between $8,854 AUD and $12,986 AUD per carat. The same specification in lab grown form lists at a median of about $2,006 AUD per carat. Over the last 30 days the median price moved -1.7% and the number of listings moved +11.4%.

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

1,032

Lowest Price

$8,582 AUD

Highest Price

$81,203 AUD

Average Price

$29,021 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

38.5%

Price Spread

38.6%

30-Day Price Trend

-1.7%

30-Day Supply Change

+11.4%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$7,521/ct

10th Percentile

$5,082

Median

$7,521

90th Percentile

$10,626

Score Distribution

2.4K diamonds scored across 4 quality tiers

Excellent

156 (6.4%)

Very Good

664 (27.1%)

Good

508 (20.7%)

Average

1,121 (45.8%)

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Consider Instead

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

H SI2SI2 inclusions are not visible without magnification

Save 22%

Lab-Grown H SI1Same specifications, lab-grown origin

Save 80%

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