How much does a 3.00 to 4.99ct G SI1 lab grown heart diamond cost?

As of November 2026, 3.00 to 4.99ct G SI1 lab grown heart diamonds typically cost $799 NZD to $5,313 NZD, with a median price of $2,460 NZD. There are currently 9 diamonds matching this specification available across retailers.

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

About 43% of these diamonds are available at multiple retailers, with an average price spread of 89%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct G SI1 Lab Grown Heart

Quick answer

As of November 2026, there are 9 lab grown heart diamonds with G colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $799 NZD to $5,313 NZD, with a median of $2,460 NZD. At least 34 retailers stock this exact specification, and 43% of the stones appear at more than one of them, with an average price spread of 89%. Half of all listings fall between $461 NZD and $1,188 NZD per carat. The same specification in natural form lists at a median of about $18,828 NZD per carat. Over the last 30 days the median price moved +11.7% and the number of listings moved +8.5%.

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

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Heart lab grown stones in the index: 428 USD per carat, +1.4% 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: November 2026

Available

Lowest Price

$677 NZD

Highest Price

$15,399 NZD

Average Price

$2,805 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

42.6%

Price Spread

89.1%

30-Day Price Trend

+11.7%

30-Day Supply Change

+8.5%

Volatility (30d)

0.05

Price Range

Price per carat distribution across retailers

$458/ct

10th Percentile

$159

Median

$458

90th Percentile

$1,017

Score Distribution

27 diamonds scored across 4 quality tiers

Excellent

7 (25.9%)

Very Good

4 (14.8%)

Good

3 (11.1%)

Average

13 (48.1%)

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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