How much does a 1.00 to 1.49ct G SI2 natural heart diamond cost?

As of September 2026, 1.00 to 1.49ct G SI2 natural heart diamonds typically cost $1,775 AUD to $5,446 AUD, with a median price of $2,699 AUD. There are currently 1,112 diamonds matching this specification available across retailers.

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1.00 to 1.49ct G SI2 Natural Heart

Quick answer

As of September 2026, there are 1,112 natural heart diamonds with G colour and SI2 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $1,775 AUD to $5,446 AUD, with a median of $2,699 AUD. At least 49 retailers stock this exact specification. Half of all listings fall between $2,195 AUD and $3,285 AUD per carat. The same specification in lab grown form lists at a median of about $2,960 AUD per carat.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Heart natural stones in the index: 2,261 USD per carat, +1.7% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

1,112

Lowest Price

$552 AUD

Highest Price

$11,140 AUD

Average Price

$3,173 AUD

Market Intelligence

Retailers Selling

Price Spread

41.5%

Price Range

Price per carat distribution across retailers

$1,873/ct

10th Percentile

$1,343

Median

$1,873

90th Percentile

$3,146

Score Distribution

1.1K diamonds scored across 4 quality tiers

Excellent

184 (16.5%)

Very Good

333 (29.9%)

Good

333 (29.9%)

Average

262 (23.6%)

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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