How much does a 3.00 to 4.99ct G SI2 lab grown heart diamond cost?

As of September 2026, 3.00 to 4.99ct G SI2 lab grown heart diamonds typically cost $722 NZD to $4,098 NZD, with a median price of $1,234 NZD. There are currently 8 diamonds matching this specification available across retailers.

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

Compare prices across retailers on Carat Hunter to see all your options.

3.00 to 4.99ct G SI2 Lab Grown Heart

Quick answer

As of September 2026, there are 8 lab grown heart diamonds with G colour and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $722 NZD to $4,098 NZD, with a median of $1,234 NZD. At least 13 retailers stock this exact specification. Half of all listings fall between $347 NZD and $632 NZD per carat. The same specification in natural form lists at a median of about $8,730 NZD 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 lab grown stones in the index: 440 USD per carat, -9.4% 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

Lowest Price

$689 NZD

Highest Price

$8,660 NZD

Average Price

$2,183 NZD

Market Intelligence

Retailers Selling

Price Spread

54.3%

Price Range

Price per carat distribution across retailers

$302/ct

10th Percentile

$161

Median

$302

90th Percentile

$1,136

Score Distribution

8 diamonds scored across 4 quality tiers

Excellent

3 (37.5%)

Very Good

1 (12.5%)

Good

1 (12.5%)

Average

3 (37.5%)

Find Your Diamond

Search 8 G SI2 heart diamonds and compare prices.

Search Diamonds

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