How much does a 0.50 to 0.74ct F SI1 natural heart diamond cost?

As of October 2026, 0.50 to 0.74ct F SI1 natural heart diamonds typically cost $630 AUD to $1,461 AUD, with a median price of $917 AUD. There are currently 621 diamonds matching this specification available across retailers.

Where can I find the best price on a F SI1 heart diamond?

About 34% of these diamonds are available at multiple retailers, with an average price spread of 34%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct F SI1 Natural Heart

Quick answer

As of October 2026, there are 621 natural heart diamonds with F colour and SI1 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run $630 AUD to $1,461 AUD, with a median of $917 AUD. At least 59 retailers stock this exact specification, and 34% of the stones appear at more than one of them, with an average price spread of 34%. Half of all listings fall between $1,346 AUD and $1,900 AUD per carat. The same specification in lab grown form lists at a median of about $755 AUD per carat. Over the last 30 days the median price moved -1.6% and the number of listings moved +3.7%.

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

621

Lowest Price

$538 AUD

Highest Price

$2,884 AUD

Average Price

$990 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

34.1%

Price Spread

34.5%

30-Day Price Trend

-1.6%

30-Day Supply Change

+3.7%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$1,130/ct

10th Percentile

$850

Median

$1,130

90th Percentile

$1,846

Score Distribution

1.5K diamonds scored across 4 quality tiers

Excellent

304 (20.6%)

Very Good

198 (13.4%)

Good

455 (30.8%)

Average

520 (35.2%)

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Consider Instead

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

F SI2SI2 inclusions are not visible without magnification

Save 6%

Lab-Grown F SI1Same specifications, lab-grown origin

Save 53%

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