How much does a 0.75 to 0.99ct J SI2 natural heart diamond cost?

As of October 2026, 0.75 to 0.99ct J SI2 natural heart diamonds typically cost $1,052 AUD to $2,661 AUD, with a median price of $1,569 AUD. There are currently 48 diamonds matching this specification available across retailers.

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

About 32% of these diamonds are available at multiple retailers, with an average price spread of 55%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct J SI2 Natural Heart

Quick answer

As of October 2026, there are 48 natural heart diamonds with J colour and SI2 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run $1,052 AUD to $2,661 AUD, with a median of $1,569 AUD. At least 32 retailers stock this exact specification, and 32% of the stones appear at more than one of them, with an average price spread of 55%. Half of all listings fall between $1,563 AUD and $2,665 AUD per carat. Over the last 30 days the median price moved -0.3% and the number of listings moved +7.2%.

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. Heart natural stones in the index: 2,374 USD per carat, +9.8% 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

$723 AUD

Highest Price

$5,887 AUD

Average Price

$1,766 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

31.5%

Price Spread

55.2%

30-Day Price Trend

-0.3%

30-Day Supply Change

+7.2%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$1,403/ct

10th Percentile

$870

Median

$1,403

90th Percentile

$2,628

Score Distribution

160 diamonds scored across 4 quality tiers

Excellent

17 (10.6%)

Very Good

15 (9.4%)

Good

31 (19.4%)

Average

97 (60.6%)

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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