How much does a 1.00 - 1.49ct I SI2 natural round diamond cost?

As of April 2026, 1.00 - 1.49ct I SI2 natural round diamonds are available from $92 AUD to $1,274,029 AUD, with an average price of $10,162 AUD. There are currently 17,098 diamonds matching this specification available across retailers.

Where can I find the best price on a I SI2 round diamond?

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1.00 - 1.49ct I SI2 Natural Round

As of April 2026, there are 17,098 natural round diamonds with I color and SI2 clarity in the 1.00 - 1.49ct range available across retailers worldwide. Prices range from $92 AUD to $1,274,029 AUD, with an average of $10,162 AUD.

Last updated: April 2026

Available

17,098

Lowest Price

$92 AUD

Highest Price

$1,274,029 AUD

Average Price

$10,162 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

N/A

Price Spread

44.4%

30-Day Price Trend

N/A

30-Day Supply Change

N/A

Volatility (30d)

N/A

Price Range

Price per carat distribution across retailers

$2,390/ct

10th Percentile

$1,639

Median

$2,390

90th Percentile

$3,852

Score Distribution

17.1K diamonds scored across 4 quality tiers

Excellent

3,637 (21.3%)

Very Good

6,774 (39.7%)

Good

4,018 (23.5%)

Average

2,646 (15.5%)

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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