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

As of October 2026, 0.20 to 0.49ct D SI1 natural heart diamonds typically cost $463 AUD to $1,304 AUD, with a median price of $746 AUD. There are currently 227 diamonds matching this specification available across retailers.

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

About 47% of these diamonds are available at multiple retailers, with an average price spread of 24%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct D SI1 Natural Heart

Quick answer

As of October 2026, there are 227 natural heart diamonds with D colour and SI1 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run $463 AUD to $1,304 AUD, with a median of $746 AUD. At least 21 retailers stock this exact specification, and 47% of the stones appear at more than one of them, with an average price spread of 24%. Half of all listings fall between $2,049 AUD and $2,582 AUD per carat. The same specification in lab grown form lists at a median of about $653 AUD per carat. Over the last 30 days the median price moved -6.9% and the number of listings moved -1.0%.

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

227

Lowest Price

$269 AUD

Highest Price

$2,424 AUD

Average Price

$807 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

47.1%

Price Spread

23.6%

30-Day Price Trend

-6.9%

30-Day Supply Change

-1.0%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$1,590/ct

10th Percentile

$1,165

Median

$1,590

90th Percentile

$2,027

Score Distribution

556 diamonds scored across 4 quality tiers

Excellent

83 (14.9%)

Very Good

124 (22.3%)

Good

131 (23.6%)

Average

218 (39.2%)

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Consider Instead

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D SI2SI2 inclusions are not visible without magnification

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Lab-Grown D SI1Same specifications, lab-grown origin

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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