How much does a 0.50 to 0.74ct G SI2 natural heart diamond cost?

As of October 2026, 0.50 to 0.74ct G SI2 natural heart diamonds typically cost $684 NZD to $1,889 NZD, with a median price of $1,039 NZD. There are currently 220 diamonds matching this specification available across retailers.

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

About 31% of these diamonds are available at multiple retailers, with an average price spread of 35%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct G SI2 Natural Heart

Quick answer

As of October 2026, there are 220 natural heart diamonds with G colour and SI2 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run $684 NZD to $1,889 NZD, with a median of $1,039 NZD. At least 49 retailers stock this exact specification, and 31% of the stones appear at more than one of them, with an average price spread of 35%. Half of all listings fall between $1,579 NZD and $2,233 NZD per carat. Over the last 30 days the median price moved -1.7% and the number of listings moved +1.8%.

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

220

Lowest Price

$539 NZD

Highest Price

$3,459 NZD

Average Price

$1,187 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

30.9%

Price Spread

34.7%

30-Day Price Trend

-1.7%

30-Day Supply Change

+1.8%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$1,063/ct

10th Percentile

$766

Median

$1,063

90th Percentile

$1,800

Score Distribution

535 diamonds scored across 4 quality tiers

Excellent

110 (20.6%)

Very Good

73 (13.6%)

Good

153 (28.6%)

Average

199 (37.2%)

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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