How much does a 0.20 to 0.49ct F SI1 natural heart diamond cost?

As of October 2026, 0.20 to 0.49ct F SI1 natural heart diamonds typically cost $492 AUD to $868 AUD, with a median price of $702 AUD. There are currently 340 diamonds matching this specification available across retailers.

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

About 39% of these diamonds are available at multiple retailers, with an average price spread of 25%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct F SI1 Natural Heart

Quick answer

As of October 2026, there are 340 natural heart diamonds with F colour and SI1 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run $492 AUD to $868 AUD, with a median of $702 AUD. At least 16 retailers stock this exact specification, and 39% of the stones appear at more than one of them, with an average price spread of 25%. Half of all listings fall between $1,856 AUD and $2,372 AUD per carat. Over the last 30 days the median price moved -5.8% and the number of listings moved -3.4%.

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. 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

340

Lowest Price

$297 AUD

Highest Price

$1,775 AUD

Average Price

$705 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

39.2%

Price Spread

24.5%

30-Day Price Trend

-5.8%

30-Day Supply Change

-3.4%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$1,479/ct

10th Percentile

$1,024

Median

$1,479

90th Percentile

$1,956

Score Distribution

719 diamonds scored across 4 quality tiers

Excellent

65 (9.0%)

Very Good

180 (25.0%)

Good

160 (22.3%)

Average

314 (43.7%)

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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