How much does a 0.20 to 0.49ct G SI2 natural heart diamond cost?

As of October 2026, 0.20 to 0.49ct G SI2 natural heart diamonds typically cost $532 NZD to $1,014 NZD, with a median price of $799 NZD. There are currently 156 diamonds matching this specification available across retailers.

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

About 27% of these diamonds are available at multiple retailers, with an average price spread of 28%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct G SI2 Natural Heart

Quick answer

As of October 2026, there are 156 natural heart diamonds with G colour and SI2 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run $532 NZD to $1,014 NZD, with a median of $799 NZD. At least 12 retailers stock this exact specification, and 27% of the stones appear at more than one of them, with an average price spread of 28%. Half of all listings fall between $2,120 NZD and $2,784 NZD per carat. Over the last 30 days the median price moved -5.1% and the number of listings moved -11.1%.

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

156

Lowest Price

$327 NZD

Highest Price

$1,987 NZD

Average Price

$784 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

26.9%

Price Spread

27.5%

30-Day Price Trend

-5.1%

30-Day Supply Change

-11.1%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,361/ct

10th Percentile

$1,013

Median

$1,361

90th Percentile

$1,836

Score Distribution

354 diamonds scored across 4 quality tiers

Excellent

42 (11.9%)

Very Good

92 (26.0%)

Good

61 (17.2%)

Average

159 (44.9%)

Find Your Diamond

Search 156 G SI2 heart diamonds and compare prices.

Search Diamonds

Consider Instead

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

H SI2H colour is visually identical to G to the naked eye

Save 14%

G I1I1 inclusions are not visible without magnification

Save 21%

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